Siemens Gamesa management: One team for global leadership


Executives at Siemens Gamesa

One team for global leadership
At Siemens Gamesa, we're constantly working on better solutions for renewables – to provide cleaner, more reliable and more affordable energy to society, and to create lasting value for all stakeholders. See who is responsible in our company.
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Andreas Nauen - CEO

Andreas Nauen was appointed as CEO of Siemens Gamesa Renewable Energy in June 2020.

A mechanical engineer who also holds an MBA, Mr. Nauen has a strong track record in the renewables industry with over 11 years as CEO of Siemens Wind Power as well as REpower/Senvion.

Prior to accepting his current position of CEO, Mr. Nauen was CEO of the Offshore Business Unit and member of the global Executive Committee at Siemens Gamesa Renewable Energy. He has held these positions since 2017. He additionally served as the Managing Director of Siemens Gamesa’s legal entity in Denmark.

His career within the power generation industry began in 1991 with Siemens, where over the course of a decade he operated in branches worldwide in diverse and key roles. 

He served as the first CEO of the global wind turbines business of Siemens from 2004 to 2010, leading the integration of the newly acquired company Bonus Energy A/S.

He then accepted the position of CEO for the global wind turbines business at REpower/Senvion, where he oversaw substantial market, employee, and service business revenue growth for the company from 2010 to 2015.

Mr. Nauen has served on a number of supervisory boards and is currently on the board of NKT A/S (Cables) in Copenhagen, Denmark and Semco Maritime (Wind and Oil and Gas Business) in Esbjerg, Denmark.

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Business Units

Juan P. Gutierrez is the Chief Executive Officer of the global Service Business Unit at Siemens Gamesa Renewable Energy. He has held this position since August 2020.

Prior to his current position, Juan was the CEO of Service Americas. He came to Siemens Gamesa in early 2020 after leading the Global Marketing and Sales Operations for Power Generation Services at Siemens Energy, Inc. His focus was implementing long-term program methodologies globally, optimizing sales processes and improving marketing activities to increase hit rate and drive sales growth.

From 2008 to 2016, Juan served in various capacities in Siemens Wind Power, including Head of Latin America, Head of Global Onshore Product Lifecycle Management and Director of Business Development for the Americas Region.
Prior to 2008, he held several positions of increasing responsibility at Siemens Energy, Inc. in the Energy Solutions organization as a thermal cycle engineer.

Juan earned a bachelor's degree in Mechanical Engineering from Universidad de los Andes in Bogota, Colombia, a master’s degree in Mechanical Engineering from the University of Illinois and a Master of Business Administration from Rollins College.

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Corporate Functions

Christoph Wollny was appointed Chief Operating Officer (COO) of Siemens Gamesa Renewable Energy in December 2018. With 25 years of international experience in different industries – such as Automotive, Engineering and Construction, Energy & Power Generation and Communication – he joined Siemens Gamesa from a position as Chief Procurement Officer at Siemens’ Power & Gas Division. He combines vast experience in procurement, productivity programs, and IT with controlling expertise in industrial contexts.

Christoph Wollny assumed the position as Chief Procurement Officer at Siemens Power & Gas in 2015. Among other topics, he was responsible for the entire supply chain management including quality, operational purchasing, logistics, productivity program, and IT strategy.

Before joining Siemens, Christoph Wollny held various positions in finance and controlling in an industrial environment between 1997 and 2015, e.g. setting up a controlling system for a manufacturing network, asset management and capacity planning.

From 1986 to 1996, he held several assignments in purchasing and successfully ran multiple cross-functional productivity programs focusing on procurement, manufacturing and R&D. He completed a vocational training at Siemens AG as Industry Commercial and completed a Master of Business Administration (Dipl.-Kaufmann) at the Technical University Berlin between 1984 to 1992.

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Jürgen Bartl was nominated General Secretary and General Counsel of Siemens Gamesa Renewable Energy on October 20, 2017. Prior to accepting this position, he served as General Counsel of the Wind Power and Renewables Division of Siemens AG.

Jürgen Bartl has more than 15 years of experience in advising energy and power generation businesses, with over 10 years with respect to the renewable energy industry.

Mr. Bartl started his professional career in the year 2000 as an in-house antitrust attorney at Siemens in Munich. He moved to his first management position in 2006 by becoming the General Counsel of Siemens S.A/N.V., the Siemens regional company in Brussels, Belgium. In 2008, Jürgen Bartl moved to Erlangen as General Counsel of the newly created Renewable Energy Division. The Division was subsequently split into Wind Power and Solar & Hydro, and Jürgen Bartl continued to be in charge of both Divisions as General Counsel. In 2013 he became the General Counsel of the Wind Power and Renewables Division of Siemens AG.

Jürgen Bartl has studied law in Würzburg, Germany, Louvain-la-Neuve, Belgium, and Chicago, USA. He holds a doctoral degree (doctor iuris) from the University of Würzburg and a Master of Laws degree (LL.M.) from the Chicago-Kent College of law. He is admitted to the Bar in Munich.

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Carlos Albi is Siemens Gamesa Renewable Energy´s Managing Director of Corporate Development and Strategy since December 1, 2018. In addition, Carlos Albi coordinates Siemens Gamesa solar activities and is Board member of regional subsidiaries of Siemens Gamesa and of the Joint Venture NEM Solutions.

Prior to his appointment, he was heading the Corporate Development department of Siemens Gamesa and led the execution of the merger between Gamesa and Siemens Wind Power, the integration of both companies and the company’s transformation plan under the L3AD 2020 program.  

Before joining the company, he spent more than 10 years at Bank of America Merrill Lynch in London and Madrid, where he served as director of investment banking, strategy and corporate finance advice for large companies across different sectors and in transactions totaling more than €50bn. 

Carlos Albi holds a degree in Business Administration from the ICADE business school.

Marc Immink has served as Siemens Gamesa Renewable Energy´s Internal Audit Director since April 1, 2020.

He has a professional career spanning over 20 years in auditing and has a wealth of experience in both external auditing (PwC) and internal auditing in listed companies including BAT, Teva Pharmaceuticals and Corbion.

Marc holds a Master´s degree in Business Administration from ESADE (Barcelona). He is also a Certified Public Accountant (CPA) from the American Institute of Certified Public Accountants and a Certified Internal Auditor (CIA) from the Institute of Internal Auditors.

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Dietmar Dresp is Siemens Gamesa Renewable Energy´s Chief Procurement Officer.


He has over 20 years’ experience in procurement and has served as Chief Procurement Officer in various international companies. Dietmar has a wealth of experience in building successful global procurement organizations.


Before joining Siemens Gamesa in January 2020, he worked in the aerospace and automotive industry as Chief Procurement Officer at ARCONIC (USA) setting up a new procurement organization across 12 countries and over 150 plants.


Antonio de la Torre is the Chief Technology Officer (CTO) at Siemens Gamesa Renewable Energy (SGRE), a position he has held since June 2017. He is defining and monitoring the new company’s technology and R&D strategy and leads the digital transformation of SGRE.

Antonio de la Torre has an extensive professional career with more than 28 years of experience in the world of engineering and technology. Since 2008, he has been leading the product development at Gamesa, a position he left to become the combined company’s new CTO. Before joining Gamesa, he built his career in several technical executive positions in aerospace companies, participating on either civil or military European programs.

Mr. de la Torre has a MS Engineering in Aeronautics from the Polytechnic University of Madrid and holds a Master in Business Administration for Technological and Industrial Companies from the public Business School of Industrial Organization (EOI). He also completed IESE Business School’s Executive Development Program.

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Ben Hunt is Global Head of Corporate Affairs leading the Corporate Communications & Public Affairs departments from Madrid. He joined Siemens Gamesa in September 2019.

Prior to this role, Ben was Group Communications Director for technology giant Amadeus Group from January 2013-August 2019. There, he led an international team, drove thought leadership articles, and steered successful communication campaigns of the group’s M&A activity, including the acquisitions of Navitaire and TravelClick.

Ben has also held other high-profile roles including as Head of External Communications for Nokia Siemens Networks. In this time, he was responsible for its communications strategy and execution, and covered a number of major corporate events such as its €1.2bn acquisition of Motorola wireless.

Before that time, he occupied the position of Director of Corfin Public Relations in London where he advised on the financial and corporate communications strategies for several London-listed companies.

His roles in corporate communications were preceded by assignments in the political sector, and for seven years as a journalist for the Financial Times covering technology, media and telecoms. During his time with the FT he also worked as an editor for, as IT correspondent and was launch editor for the FT’s Digital Business supplement.

Ben brings a wealth of experience to his new role as a journalist, as a leader in corporate and financial communications from media relations to internal communications, and in executive speech writing.


Javier Fernandez Combarro was appointed to the position of Human Resources Director at Siemens Gamesa Renewable Energy in November 2017.

Mr. Combarro has decades of global HR management and leadership experience across 130 countries, driving outstanding results, change, and transformation in different industries and business markets.

Prior to accepting his current position, Mr. Combarro served as global head of HR Transformation and HR Operations at Maersk Line, A.P. Moller Group, from 2014 to 2017. While there he led the transformation of HR globally, implemented a new service delivery model, and optimized HR processes.
Having been with A.P. Moller since 2008, he also served as the West and Central Asia Human Resources Director, before which he was the Iberia Cluster Human Resources Director.

Mr. Combarro was with SITEL Worldwide from 1992 to 2007, starting as HR Director: Teleaction and moving within the company to the positions of Human Resources Director Spain and Portugal, Vice President of Human Resources, Senior Vice President (Latin America), and finally as Global Human Resources Vice President from 2004 to 2007.

Mr. Combarro studied law at the Complutense University of Madrid and achieved his master’s degree in tax and legal advice from the Technical University of Madrid in 1992.

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Alan Feeley was appointed CIO of Siemens Gamesa Renewable Energy in April 2017. He was subsequently also nominated as the Chief Cyber Security Officer in September 2017.

Alan Feeley has over 30 years of senior management experience after a career of diverse regional & corporate CIO and Shared Services Managing Director roles. Prior to accepting these roles at Siemens Gamesa, he held a European CIO Role within Siemens AG, whilst also managing a Global Transformation Program aimed at introducing modern and digital working environments impacting all aspects of people and technologies.

Mr. Feeley has a clear vision for Information Technology & Cyber Security at Siemens Gamesa, a vision built around the reality of any modern tier one industry leading business: modern, cloud based, data driven, mobile, scalable and affordable.

His extensive change management and transformation experience, together with a strong process understanding will support a clear Information & Cyber Security Roadmap development for our company.

Alan Feeley began his professional career in Dublin, Ireland as a computer programmer before making his first international experience in 1987 with Nixdorf Computer AG in Paderborn, Germany. He subsequently joined Siemens AG in Munich and has benefited through his career from many different locations and cultures as a consequence of career moves over time.

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Gregorio Acero was appointed to the position of Global Head of QM&HSE of Siemens Gamesa in April 2017. He serves a dual role as Head of Corporate QM&HSE as well as Head of QM&HSE for the Offshore Business Unit.

Mr. Acero has more than 15 years of experience in executive positions in leading companies, with assignments in quality, HSE, CSR, supply chain, manufacturing, engineering, R&D and more. This includes vital industry expertise, such as his most recent position prior to his current, Head of QM&HSE at Siemens Wind Power; as well as top positions in other wind industry organizations, such as Global Senior Director of Advanced Quality Assurance at Vestas and as Director of Methods and Processes at LM Windpower.

He also has considerable experience in a variety of other industries, for instance as Head of Quality for Western Europe, Middle East and Africa at the rail transportation market leader, Bombardier Transportation.

His extensive working experience is supported by his qualifications, which include an MBA from the EAE Business School, a Masters of Occupational Health and Safety from the University Complutense of Madrid, a MSc. in Physics from the University of Salamanca, and the Diplome d’études approffondie in optics, optoelectronics and microwaves at the Institut National Polytechnique de Grenoble.

Among other relevant activities, he served as co-chairman of the Board of Directors of APQP4Wind; as a member of the panel for development of the Quality Profession at the Chartered Quality Institute and held multiple chairs for the Spanish Wind Energy Association, including chairman for the 1st European Meeting on Risk Prevention in the Wind Power Industry.

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Sérgio Filipe is the Chief Compliance Officer of Siemens Gamesa since July 2020.

Mr. Filipe began his career with the Siemens group in Portugal in 1991, where he held the most varied positions within Management, Marketing and Sales. Afterwards, he continued his professional path with Siemens group in Germany, the United Kingdom and the United States of America. In the latter assuming the role of Industrial Solution Manager at Infineon in Detroit.

Before assuming the position of Chief Compliance Officer in Siemens Gamesa, Mr. Filipe was the CEO of Siemens Angola for 5 years. Earlier, he was nominated as the Compliance Officer of Siemens Portugal, responsible for several European countries.

In addition, Mr. Filipe also played a prominent role as Vice-President of the German School of Lisbon and was a member of the Executive Board of the “Association International Society of Automation” (A.I.S.A.) in Portugal.

Mr. Filipe holds a degree in Change Management and a MBA from the Open University Business School.

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