Leadership Teams

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Mary Quaney

Group Chief Executive Officer

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Mary Quaney

Group Chief Executive Officer

Mary was appointed Group Chief Executive Officer in August 2020. She joined Mainstream in 2009 and she held the role of Group Chief Financial Officer since 2017.

Mary has graduate and post-graduate qualifications from UCD and is a Fellow Chartered Accountant (FCA) and Chartered Tax Adviser (CTA). She is an advocate and spokesperson on gender diversity and participated was a mentor for the Global Wind Energy Council’s (GWEC) Women in Wind programme.

Prior to joining Mainstream, Mary held senior-level positions in finance and corporate tax in PricewaterhouseCoopers and Trinity Biotech Plc.

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Julie Berg

Chief Financial Officer

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Julie Berg

Chief Financial Officer

Julie brings over 27 years of experience within finance and internal control and is an experienced leader with focus on promoting diversity in the workplace.

She has held the role as Audit Partner for several years, during which time she has supported many large, listed entities in Norway and has worked closely with Aker for many years.

Originally from the UK, she has extensive international experience within the energy and industrial sectors. Julie is a State Authorised Public Accountant.

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Paul Corrigan

Commercial Director

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Paul Corrigan

Commercial Director

Paul was appointed to the role of Commercial Director in May 2024. He joined Mainstream in 2008 and has been a part of Mainstream’s management team and a director of a number of Mainstream group companies since 2014.

Previously, he led Mainstream’s corporate finance division responsible for managing company strategy and the funding of Mainstream’s global activities principally through raising equity and debt amounts at the holding company and project company levels working with large international financial institutions and smaller retail or High Net Worth investors in Ireland and the UK.

Paul has executed multiple transactions with a value of c.€2.0bn, in project finance, mezzanine finance, trade finance, corporate debt, M&A etc across multiple jurisdictions.

Prior to joining Mainstream, he worked in IBI Corporate Finance and KPMG, qualifying as an Associate of both the Irish Taxation Institute and a Fellow of the Institute of Chartered Accountants. He holds a Master’s degree in Finance and Economics from the London School of Economics.

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Bart Doyle

Investment Director - Strategic Partnerships & Special Projects

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Bart Doyle

Investment Director - Strategic Partnerships & Special Projects

Bart has responsibility for overseeing the governance and management of Mainstream’s strategic partnerships and joint ventures globally. He was Group Chief Operating Officer from 2017 to 2024 and prior to that he was General Manager for the Company’s Chilean business for three years.

He has decades of experience in the global energy sector having worked for Airtricity and Schlumberger Oilfield Services.

Bart graduated as an Electronic and Electrical Engineer from Trinity College Dublin (TCD), he holds an MBA from University College Dublin, several certifications from the PMI and a Higher Diploma in Construction Law and Contract Administration from TCD.

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Elaine Quinlan

Global Head of Human Resources

Elaine Quinlan

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Elaine Quinlan

Global Head of Human Resources

Elaine joined Mainstream in 2008 and has 20 years of diverse Human Resources experience in the renewable energy industry. She and her team are responsible for providing a comprehensive and commercially focused HR service for the Mainstream Group.

She successfully established and grew the Human Resources department where her team has supported the establishment of offices and recruitment of staff across 6 continents. She is part of Mainstream’s Sustainability Committee.

Prior to joining Mainstream, Elaine worked at Airtricity as Senior HR Executive.

Elaine earned her Bachelor of Arts degree in Spanish and Economics from University College Cork and a Bachelor’s Degree in Human Resource Management from the National College of Ireland. She is a Chartered member of CIPD.

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Hein Reyneke

General Manager, Africa

Hein Reyneke

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Hein Reyneke

General Manager, Africa

Hein assumed the position of General Manager in 2016. He has direct responsibility for projects in development, construction and operations including taking the lead on Mainstream’s Africa initiatives late in 2016.

Since Hein joined Mainstream, his roles have included project and business development through to construction. Having worked in renewable energy since 2008, Hein has vast knowledge and experience in the industry.

Hein trained as a mechanical engineer and built a successful career in delivering complex projects and new business initiatives leading multi-disciplinary teams of professionals. His experience covers rewarding enterprises in the automotive, rail, marine and energy industries. He has been one of the pioneers of the South African renewable energy industry and a board member of the South African Wind Energy Association (SAWEA) from 2014 to 2018.

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Manuel Tagle

General Manager, LATAM

Manuel Tagle

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Manuel Tagle

General Manager, LATAM

Manuel Tagle stepped into the role as General Manager of Mainstream’s LatAm business in April of 2018.

He has extensive experience in the energy industry, particularly in renewables. Prior to joining Mainstream, Manuel was CEO of SunPower and Commercial Manager of Sociedad GNL Mejillones.

Manuel has a degree in civil industrial engineering and an MBA from the Universidad de Desarrollo, Chile. He is currently the Treasury Director of ACERA, the Chilean Association of Renewable Energy.

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Tove Røskaft

Head of Offshore Wind

Tove Røskaft

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Tove Røskaft

Head of Offshore Wind

Tove was appointed Head of Offshore Wind in 2022 and holds responsibility for the Offshore Wind center of excellence including development, projects, partnerships and technology.

Her appointment follows the integration of Aker Offshore Wind where she held the role of Chief Operating Officer. Tove joined Aker Offshore Wind in 2021 and has extensive global leadership experience. Her previous leadership experience at Aker includes roles such as Executive Vice President, Country Manager, Chief Communication Officer as well as leading large transformation projects in Aker Solutions.

In addition, she has held several other leadership roles within project management, manufacturing, and engineering. Through her over 25 years of experience in the energy industry, Ms. Røskaft has demonstrated the ability to inspire and motivate teams to deliver high performance and results.

Ms. Røskaft holds a M.Sc. in Marine Hydrodynamics from NTNU, the Norwegian University of Science and Technology.

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Eduardo Karlin

General Manager, APAC

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Eduardo Karlin

General Manager, APAC

Eduardo joined the Asia Pacific team in 2020 and took up his current role, with responsibility for Mainstream’s business development and expansion in the region, in June 2021.

Previously, he was part of the Group’s Central Commercial team.

He has worked in the renewable energy sector since 2010, with a focus on business development and project finance transactions in emerging markets.

To date, he has closed more than 4,000 MW (gross), with cumulative deal values in excess of USD 1 billion in South America, Southern Africa and Southeast Asia.

Before joining Mainstream in 2017, he worked with FBP Investments, leading market entry in Indonesia in 2011 and developing the country’s first utility-scale solar PV project, and spent time as a Senior Consultant with KPMG Advisory in Rio de Janeiro, Brazil, with a focus on the energy sector.

Eduardo holds a BSc in International Economics from Universita’ Bocconi (Italy), an MA in International Studies from the University of Vienna (Austria) and is fluent in English, Italian, Portuguese, Spanish and French.

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Bryan O’Shaughnessy

Group Chief Operating Officer

Bryan O’Shaughnessy

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Bryan O’Shaughnessy

Group Chief Operating Officer

Bryan was appointed Group COO of Mainstream in June 2024. He joined Mainstream in June, 2022 as COO for Latam and has over 30 years’ experience leading multinational energy projects. Prior to his arrival at Mainstream, he was Operations Director at Prime Energía. Given his background, he has a strong understanding of engineering disciplines, including mechanical, automation and electrical, with a methodical and structured approach to project engineering.

Bryan has a Bachelors degree in Engineering (honours) from University of Limerick.

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Birgitte Karlsen

General Counsel

Birgitte Karlsen

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Birgitte Karlsen

General Counsel

Birgitte was appointed General Counsel at Mainstream in October 2022 where she has responsibility for the legal and compliance functions across the Group.

She joined Mainstream from the position of General Counsel at Aker Offshore Wind following the company’s combination with Mainstream in August 2022.

She has worked in private practice within the energy sector for most of her career and since 2013 as a partner in the law firm Wikborg Rein.

Birgitte graduated with a law degree from the University of Bergen in 2002.

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Patrick Warren

Chief Technical Officer

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Patrick Warren

Chief Technical Officer

In June 2021, Patrick was appointed Chief Technical Officer for Mainstream with an immediate focus on digitalisation and identifying and deploying new technology to enable Mainstream to develop, construct and operate renewable projects more efficiently at a lower cost.

Having joined Mainstream in 2011, he previously led the procurement, engineering, EAG, construction, operations and development activities centrally within the Mainstream group.

Patrick has worked in engineering, procurement and project management roles for 18 years in the energy industry, the majority of which has been spent in renewables. Patrick commenced his career in ESB International before working for six years with Kirby Group Engineering.

Patrick holds an first-class honours degree in Electrical Engineering from University College Dublin. Patrick is a member of the Institute of Engineers Ireland and the Institute of Engineering and Technology in the UK.

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Titania Stefanus Zincke

Chief Operating Officer, South Africa

Titania Stefanus Zincke

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Titania Stefanus Zincke

Chief Operating Officer, South Africa

Titania was appointed as Chief Operating Officer, South Africa, in January 2024 and holds the responsibility for Mainstream’s health and safety, construction, engineering and operational activities in the country. 

Titania’s appointment followed her role as Mainstream Asset Management South Africa General Manager, where she led MAMSA in successfully operating 610MW of wind farm projects.  Titania joined Mainstream in April 2019, when she led the Economic Development and Socio-Economic Development function for South Africa. 

Prior to joining Mainstream, she worked 19 years for the largest JSE listed fishing company in Africa in a variety of roles, such as Group Sustainability Manager, Environmental & Social Risk Director, Human Resource Manager, SHER Manager and Fishmeal & Oil Plant Manager.  Before this, Titana worked as Process and Plant engineer in the fertiliser industry. 

She holds an MTech degree in Business Administration and a BTech degree in Chemical Engineering. She is Certified Director and a member of the Institute of Directors in South Africa. 

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Lindsay Burgess

Head of HR and Business Services, South Africa

Lindsay Burgess

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Lindsay Burgess

Head of HR and Business Services, South Africa

Lindsay joined the Mainstream team in October 2018.  Her core function is supporting all employees in the South African business to ensure HR best practice. Previously, she consulted to Mainstream as a Recruitment Manager from 2012 to 2018. 

Lindsay has over 18 years’ experience in the recruitment and executive search consulting profession and developed core skills in interviewing, assessments, business consulting, research and project management. 

She holds a Certificate in Human Resource Management from the University of Cape Town and a Diploma in Public Relations and Business Communication from Damelin College, Cape Town. 

Lindsay is currently studying a Social Sciences degree, majoring in Psychology and HR at the South African College of Applied Psychology. 

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Gesie Theron

Gesie Theron

Head of Development, South Africa

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Gesie Theron

Gesie Theron

Head of Development, South Africa

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Matthew Simpson

Head of Growth, Africa

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Matthew Simpson

Head of Growth, Africa

Matthew joined Mainstream in 2021 as Head of Commercial, Africa. In this role, Matthew led the commercial function to secure PPA’s for wind and solar PV projects, involving tendering, structuring, negotiation, due diligence and ultimately close. In 2023, Matt was promoted to Head of Growth, Africa, continuing to lead the Commercial team into the next phase of Mainstream’s strategy of growing our presence in the private market, and energy trading.

Before Mainstream, Matthew worked at Eaglestone Capital Advisory, a project finance advisory boutique. During this period, Matthew advised several power and infrastructure clients on several corporate and project finance transactions across Africa. Previously, he was employed by Macquarie Capital Johannesburg, as part of the infrastructure sector team specialising in financial modelling, transaction and debt and equity procurement advisory.

Matthew is a Chartered Accountant, and a member of the South African Institute of Chartered Accountants; having completed his articles at KPMG Johannesburg in the financial services sector, bank audit.

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Candice McDonald

Head of Finance, South Africa

Candice McDonald

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Candice McDonald

Head of Finance, South Africa

Candice joined Mainstream in April 2014 as Financial Accountant responsible for managing the finances of the Round 3 projects through the construction phase from financial close into operations.

She was promoted to Finance Manager in April 2020 during which time she looked after the full finance function of the Round 4 projects, assisting with the financial close process and taking them through construction to commercial operation in late 2020. 

She started her career in London working for a Music Publishing Company followed by an internal finance role at PricewaterhouseCoopers before relocating back to South Africa and joining Mainstream. 

Candice studied a Bachelor of Commerce degree in Financial Accounting at the University of Stellenbosch and gained her CIMA qualification in 2011.

Melvin Naina

Melvin Naina

Head of Engineering & Analytics, South Africa

Melvin Naina

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Melvin Naina

Melvin Naina

Head of Engineering & Analytics, South Africa

Melvin Naina holds a graduate Diploma in Manufacturing Management and an MBA Degree. 

He was a Product Development and Validation Manager (Quality Engineering) at Johnson & Johnson Consumer, South Africa, for a number of years before moving to Eskom, where he held the role of Project Portfolio Manager for 14 years.  

Melvin joined Mainstream in 2022 and was appointed as Head of Engineering and Analytics in 2023, bringing with him a wealth of knowledge in construction and project management, having successfully commissioned a number of substations, sub-transmission lines and MV/LV networks throughout the Eastern Cape.  

He led a team that successfully delivered a number of IPP WEF and upstream strengthening projects relating to IPPs. 

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Christo Loots

Head of Construction, South Africa

Christo Loots

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Christo Loots

Head of Construction, South Africa

Christo joined Mainstream as Construction Programme Manager in 2018, his current role being Head of Construction, South Africa.

Having previously worked with SMEC, Christo had consulted to Mainstream as Site Manager on the Jeffreys Bay Wind Farm (138MW) and Noupoort Wind Farm (80MW) construction projects from 2012 to 2016. After this, he acted as Project Manager on the Loeriesfontein 2 Wind Farm (138MW) construction project. As Programme Manager Christo lead the Construction team during the construction pahases of the Kangnas Wind Farm (140MW) and Perdekraal East Wind Farm (110MW) projects.

Christo holds a Bachelor of Engineering (Civil) from University of Stellenbosch and is also a registered Project Management Professional with PMI.

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Garth La Fleur

Head of MAMSA

Garth La Fleur

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Garth La Fleur

Head of MAMSA

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Grace Foo

Head of Human Resources, APAC

Grace Foo

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Grace Foo

Head of Human Resources, APAC

Grace joined Mainstream at the end of 2019 and has 13 years of generalist human resources start-up experience, of which nine years was gained in the renewable energy industry.

She is responsible for setting up and managing the core HR operational functions for multiple entities within the Asia pacific region and plays a vital role in supporting the senior management team in developing HR strategies in line with organizational objectives.

Prior to joining Mainstream, Grace worked with Vestas and also held positions at Conergy and Juwi.

Grace graduated with a Bachelor of Arts from the National University of Singapore. 

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Kieron Kane

Head of Business Development, APAC

Kieron Kane

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Kieron Kane

Head of Business Development, APAC

Kieron became Head of Business Development as of March 1st, 2023. Kieron joined Mainstream as Head of Commercial Solar in 2017 where, during this period, he spent considerable time in APAC working closely with local colleagues jointly sourcing and assessing co-development opportunities. Kieron moved to PMO in 2019 when he took the role of Head of Central Development with responsibility for Mainstream’s Global Development Standard.

Kieron has worked in the renewables industry since 2008 and, prior to joining Mainstream, worked in a variety of roles including Business Development for a European EPC and Head of Development for a Tier 1 Module Supplier.

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Mainstream-Renewable-Power-Brian-Barry-Director-Development-APAC-and-Country-Manager-Vietnam

Brian Barry

Director Development APAC and Country Manager Vietnam

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Brian Barry

Director Development APAC and Country Manager Vietnam

Brian has spent 17 years working as a wind energy developer and consultant in Europe, Africa and Southeast Asia.

He has primarily focused on onshore utility-scale wind development, construction, and asset management, but also on offshore wind and solar PV.

He is responsible for Mainstream’s wind development in APAC.

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Randal Barker

Head of Legal, APAC

Randal Barker

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Randal Barker

Head of Legal, APAC

Randal Barker joined Mainstream in Singapore as Head of Legal, APAC in March 2023. He is responsible for Legal, Compliance and Governance across the region, and is a member of the APAC Senior Team.

Randal has lived and worked internationally in Vancouver, Tokyo, London and Perth (Australia). Previous senior roles were at Lightsource BP, where he was General Counsel, and BHP where he also held General Counsel roles in different business units. Earlier in his career, he worked in private practice with international law firms Hogan Lovells and Norton Rose Fulbright as an M&A and IPO lawyer. Working on the energy transition and action on climate change are increasingly important to Randal as a Quaker and from growing up in rural Canada.

Randal is a graduate of Harvard University and the McGill University Faculty of Law, and he completed the Advanced Management Programme at INSEAD. He is admitted to practice law in the USA, Canada, the UK and Australia.

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Emmet Curley

Head of Communications and Positioning

Emmet Curley

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Emmet Curley

Head of Communications and Positioning

Emmet has 20 years’ experience leading the Marketing and Communications functions for global renewable energy companies. He has led Mainstream’s communications since the company was founded in 2008 and previous to that was Group Marketing Manager at Airtricity.

Emmet has responsibility for Mainstream’s communications function globally and is focused on maintaining, monitoring and enhancing the company’s reputation across all jurisdictions. A core part of his role is the strategic positioning of the Mainstream brand across five continents.

Prior to Airtricity, Emmet held a number of marketing positions in the telecommunications sector in Ireland and France and was Brand Marketing Manager for telephony and internet products at BT Ireland.

He is a graduate of the Marketing Institute of Ireland. 

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Aidan Guinan

Chief Financial Officer, Offshore

Aidan Guinan

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Aidan Guinan

Chief Financial Officer, Offshore

Aidan Guinan was appointed to the role of Chief Financial Officer, Offshore in March 2023 having led the merger and integration of Aker Offshore Wind into Mainstream in 2022.

Aidan has held several positions in Mainstream since he joined in 2014 most recently as Group Head of Investment Risk, Legal and Governance where he was responsible for reviewing new investment opportunities, assessing capital allocation and diversification of risk across the group. Prior to that Aidan was Group Head of Commercial supporting the regions in commercial and project finance transactions and Project Director where he led the disposal of Mainstream’s Neart na Gaoithe 450 MW offshore wind project to EDF in 2018.

Prior to joining Mainstream, Aidan worked for an Irish infrastructure developer where he led numerous M&A transactions and raised over US $1.25bn of project finance debt for two toll road PPP transactions in Ireland. Aidan trained with PwC Ireland and is a Fellow of the Institute of Chartered Accountants in Ireland.

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Simon Counsell

Head of Group Finance

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Simon Counsell

Head of Group Finance

Simon joined Mainstream as Group Head of Finance in January 2020, with responsibility for group reporting, tax, FP&A and treasury and insurance functions. His key focus has been on the digitalisation of finance processes and broader transformation of both group and regional finance functions.

Simon has spent more than 15 years in the power industry in Europe, both in finance leadership and general management roles.

Simon has a degree in Mathematics from Bristol University and is a qualified chartered accountant with the ICAEW.

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Euan Donaldson

Head of Legal, Offshore

Euan Donaldson

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Euan Donaldson

Head of Legal, Offshore

Euan joined Mainstream as Head of Offshore Legal in January 2022. As a member of the Leadership Team he is first point of contact to provide legal and commercial advice on offshore investments, M&A, private equity, fundraisings and structuring at project and corporate level. His main focus has been to support bid and project teams globally.

Euan has experience in the construction & engineering and oil & gas sectors in legal leadership roles.

He has a law degree from Strathclyde University and is an accredited Mediator.

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Nicole Herbert

Head of HR & Business Facilities, Americas

Nicole Herbert

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Nicole Herbert

Head of HR & Business Facilities, Americas

Nicole Herbert is Head of HR & Business Facilities for the Americas region and has held this position for over 10 years.

Nicole joined Mainstream US in 2008 to hire a team of developers to work on wind energy projects in North America.

Prior to joining Mainstream, Nicole worked for four years in the global renewable energy company, Airtricity Inc. and has over 16 years of experience working in the renewable energy sector in Ireland, the United States and Chile.

Nicole has a business degree from Portobello College, Dublin.

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Mariangel Mandiola

Legal & Compliance Manager, LATAM

Mariangel Mandiola

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Mariangel Mandiola

Legal & Compliance Manager, LATAM

Mariangel is a lawyer from the Pontificia Universidad Católica of Chile, with studies in International Business from the University of London, UK. After twelve years of experience in the energy and mining sector as Regional Legal Manager for LATAM at Vestas, lawyer at AES Andes, Freeport McMoran in Madrid and standing out as part of the 3rd Generation of Women in Energy Chile 2021 of WEC-Chile; she joined Mainstream in March 2022 to lead the Legal area providing important results in actions of modernisation of contracts, review of management and corporate structure, transparency and contribution in policies of greater order, availability of information for shareholders, among others.

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Ana María Argandoña

Head of External Affairs, Communications and Communities, LATAM

Ana María Argandoña

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Ana María Argandoña

Head of External Affairs, Communications and Communities, LATAM

Ana María Argandoña joined Mainstream Renewable Power Chile as Head of External Affairs, Communications and Communities in December of 2019.

Ana María is a communications specialist with a Masters in Corporate Communications Management from the Universidad Politécnica de Cataluña in Barcelona.

She has over 15 years of experience in the public and private sectors, particularly in the mining, water and energy industries.

Ana María has also held various roles in the Ministry of Internal Affairs and the Ministry for Health. Ana María is highly experienced in communications management, community development, crisis management and conflict resolution, institutional relations, social corporate responsibility and public affairs, among others.

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Geir Ove Karlsen

Senior Vice President, Offshore Corporate Affairs

Geir Ove Karlsen

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Geir Ove Karlsen

Senior Vice President, Offshore Corporate Affairs

Geir Ove Karlsen heads up Offshore Corporate Affairs in Mainstream Renewable Power. He has extensive leadership experience from roles as Managing Director at Benestad Solutions (an Aker Solutions’ Company) and leadership roles in Aker Offshore Wind. He represents MRP on several industry committees on offshore wind and renewable energy. Geir Ove holds a M.Sc. in Business and Economics from BI Norwegian Business School and an MBA in Strategic Management from NHH Norwegian School of Economics.

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