Leadership
Leadership Team
Steve Kelley
President and Chief Executive Officer
Steve Kelley
President and Chief Executive Officer
Prior to Advanced Energy, Kelley served as president and chief executive officer of Amkor Technology, Inc., a leading semiconductor package and test company, leading its financial transformation by prioritizing strong revenue growth, efficiency gains, and a culture of continuous quality improvement. Kelley also held executive leadership roles at various semiconductor manufacturing companies including Cree, Texas Instruments, and Philips Semiconductors (now NXP Semiconductors), where he focused primarily on revenue growth through the timely development of new products and services.
Kelley holds a Bachelor of Science degree in chemical engineering from the Massachusetts Institute of Technology and a Juris Doctor (J.D.) from Santa Clara University.
Paul Oldham
Executive Vice President and Chief Financial Officer
Paul Oldham
Executive Vice President and Chief Financial Officer
Oldham brings 30 years of experience in finance and administration. Previously, he was the chief financial officer of Electro Scientific Industries, Inc. (ESI), a leading developer and manufacturer of laser-based production equipment. He also served as the senior vice president of administration and corporate secretary. Oldham helped lead ESI through a significant multi-year transformation that resulted in strong revenue growth and profitability.
Prior to joining ESI, Oldham held several senior leadership positions, including vice president of finance and corporate controller, vice president treasurer, as well as investor relations and European operations controller at Tektronix, Inc., a test, measurement, and monitoring company.
Oldham holds a Bachelor of Science degree in accounting and a Master of Business Administration in accounting and finance from Brigham Young University.
Eduardo Bernal
Executive Vice President and Chief Operations Officer
Eduardo Bernal
Executive Vice President and Chief Operations Officer
Bernal has more than 30 years of experience managing global operations in the semiconductor industry and has successfully led large, complex, global organizations through phases of significant growth and transformation. He joined Advanced Energy from NXP Semiconductors, where he was senior vice president of assembly and test operations, responsible for a global footprint of multiple factories with a team of 12,000 employees. Prior to this, Bernal was with Texas Instruments, where he held various leadership roles in operations, manufacturing, planning, and quality.
Bernal holds a Bachelor of Science degree in Industrial Engineering from the Technological Institute of Aguascalientes in Mexico, and is a graduate of the Leading Organization & Change program from the Massachusetts Institute of Technology.
Elizabeth K. Vonne
Executive Vice President, General Counsel and Corporate Secretary
Elizabeth K. Vonne
Executive Vice President, General Counsel and Corporate Secretary
Vonne has more than 20 years of experience in the legal field. She joined Advanced Energy from Mesa Laboratories, Inc., a multinational manufacturer of critical quality control solutions and life science tools, where she served as vice president, legal, general counsel and secretary. Prior to this, Vonne was a partner at Davis, Graham & Stubbs LLP, a leading law firm that focuses on corporate transactions, complex litigation and regulatory compliance. Previously, she was an associate attorney with Clearly Gottlieb Steen & Hamilton LLP in New York City.
Vonne received her Juris Doctor from Columbia Law School, her Bachelor of Arts from Amherst College and studied law at The University of Tokyo.
John Donaghey
Executive Vice President and Global Head of Sales
John Donaghey
Executive Vice President and Global Head of Sales
Donaghey has 30 years of experience in the electronics manufacturing industry. Before joining Advanced Energy, he spent seven years in senior sales and business leadership roles at Amkor Technology, most recently as global leader of sales. Prior to this, Donaghey spent 23 years with Texas Instruments in various leadership, sales, and marketing roles.
Donaghey holds a Bachelor of Science degree in electrical engineering from Texas A&M University and a Master of Business Administration from Southern Methodist University.
Rory O’Byrne
Senior Vice President and Chief People Officer
Rory O’Byrne
Senior Vice President and Chief People Officer
O’Byrne has more than 25 years of global and international human resources experience with leading public and private equity-backed companies in the technology, energy, industrial, and services sectors. Before joining Advanced Energy, he served as executive vice president and chief human resources officer for Jonah Energy LLC, one of the largest privately held natural gas producers in the U.S. Prior to this, O’Byrne served as senior vice president and chief human resources officer for MRC Global, the world’s leading global supplier of industrial products and services to the energy industry. He held global and international human resources leadership roles at BG Group, McDermott International, Hess Corporation, and BHP.
O’Byrne holds a bachelor’s degree in human resources and industrial relations from the University of Western Australia in Perth, Western Australia, and is a graduate of the Program for Leadership Development at Harvard Business School.
Randy Heckman
Senior Vice President and Chief Technology Officer
Randy Heckman
Senior Vice President and Chief Technology Officer
Heckman brings over 30 years of experience in RF and DC power systems research and design, delivering advanced power technology solutions for semiconductor, industrial, medical, and life science applications. He started his career with Continental Electronics, a former division of Varian Associates, developing high power transmitters for commercial and military applications.
Heckman holds a Bachelor of Science degree in electrical engineering from the University of Arkansas and has several U.S. and international patents.
Juergen Braun
Senior Vice President, Plasma Power Products
Juergen Braun
Senior Vice President, Plasma Power Products
Braun brings over 20 years of experience in semiconductor manufacturing with a successful record of implementing strategic business plans, leading cross-functional international teams, as well as delivering revenue and market share growth.
Braun holds a Diploma in chemistry from the University of Ulm, Baden-Württemberg, Germany, where he also completed his Ph.D. thesis on CVD growth of silicon and germanium on Si.
Shrinidhi (Shri) Chandrasekharan
Senior Vice President, Medical Power Products
Shrinidhi (Shri) Chandrasekharan
Senior Vice President, Medical Power Products
Chandrasekharan has more than 20 years of experience in the electronics and industrial manufacturing sectors. He joined Advanced Energy through the acquisition of SL Power, where he served as Acting President and held senior leadership and product management roles. Prior to this, Chandrasekharan held leadership, operations and technical roles with Eaton Corporation, Dayton Lamina Corporation, Anomatic Corporation and the National Science Foundation.
Chandrasekharan holds a Master of Business Administration from the University of Michigan, a Master of Product Design and Development from Northwestern University, a Master of Science in Industrial Engineering from Ohio State University and a Bachelor of Engineering degree in mechanical engineering from the University of Madras.
Maria Cortez
Senior Vice President, Industrial Power Products
Maria Cortez
Senior Vice President, Industrial Power Products
Cortez has more than 25 years of experience in the electronics manufacturing sector. She joined Advanced Energy from Texas Instruments, where she led the Integrated Power Management business. Prior to this, Cortez held leadership, product marketing and technical roles with NXP Semiconductor and Motorola.
Maria holds a Bachelor of Science degree in electrical engineering from the University of Texas.
Kevin Fairbairn
Senior Vice President, Corporate Development
Kevin Fairbairn
Senior Vice President, Corporate Development
Fairbairn has more than 30 years of experience in high technology processing equipment addressing semiconductors, photovoltaics, flat panel, and hard drive disks application markets. Prior to Advanced Energy, Fairbairn was chief executive officer and president of Intevac, Inc. and held senior leadership roles at Applied Materials, where he was instrumental in the development of multiple new products and process applications including ion implant, SACVD, HDPCVD, PECVD, low k films, lithography films, integrated metrology, conductor etch, and mask etch.
Fairbairn holds a Master of Arts in engineering sciences from Cambridge University in England and has more than 50 patents.
Peter Gillespie
Senior Vice President, Corporate Marketing & Strategy
Peter Gillespie
Senior Vice President, Corporate Marketing & Strategy
Between positions at Advanced Energy, Gillespie was chief marketing officer at SEMI, the global industry association representing the electronics manufacturing and design supply chain. Prior to his first tenure at Advanced Energy, Gillespie was president of Tevet Process Control Technologies (acquired by Onto Innovation) and held leadership positions at KLA, Boxer Cross (acquired by Applied Materials), Fusion Semiconductor (now Axcelis), and Intertek.
Gillespie serves on SEMI’s Board of Industry Leaders and on California Polytechnic (Cal Poly) State University College of Engineering Advisory Board. He holds a Bachelor of Science in mechanical engineering from Cal Poly State University – San Luis Obispo and has completed post-graduate courses in marketing, innovation, and finance at Stanford University.
Emdrem Tan
Senior Vice President, High Volume Products
Emdrem Tan
Senior Vice President, High Volume Products
Tan brings over 40 years of experience in the semiconductor industry with leadership roles in sales, marketing, manufacturing, and business development in Asia and the U.S. An experienced global business leader, he has a successful record of delivering revenue growth, market share gain, as well as successful development of new products. Prior to joining Advanced Energy, he held senior leadership positions at Amkor Technology, Inc., Diodes, Inc., and Texas Instruments.
Tan holds a Master of Business Administration from Brunel University in London.
Board of Directors
Frederick A. Ball
Director since 2008
Frederick A. Ball
Director since 2008
Chair of the Compensation Committee
Member of the Pricing Committee
Grant H. Beard
Chairman since 2016 and Director since 2014
Grant H. Beard
Chairman since 2016 and Director since 2014
Chair of the Pricing Committee
Anne DelSanto
Director since 2020
Anne DelSanto
Director since 2020
Member of the Compensation Committee
Member of the Nominating, Governance, and Sustainability Committee
Tina M. Donikowski
Director since 2018
Tina M. Donikowski
Director since 2018
Chair of the Nominating, Governance, and Sustainability Committee
Member of the Audit and Finance Committee
Ronald C. Foster
Director since 2014
Ronald C. Foster
Director since 2014
Chair of the Audit and Finance Committee
Member of the Pricing Committee
Steve Kelley
Director since 2021
Steve Kelley
Director since 2021
Lanesha Minnix
Director since 2020
Lanesha Minnix
Director since 2020
Member of the Nominating, Governance, and Sustainability Committee
Member of the Audit and Finance Committee
David Reed
Director since 2022
David Reed
Director since 2022
Member of the Compensation Committee
John A. Roush
Director since 2016
John A. Roush
Director since 2016
John A. Roush currently serves as an operating executive advisor to ACON Investments, LLC, a private equity firm. Mr. Roush serves on the board of two privately held ACON portfolio companies: (1) Pine Environmental LLC, a provider of test equipment and services for environmental consultants; and (2) Novipax LLC, a producer of absorbent pads for the poultry industry. Mr. Roush also serves as a director of Lemaitre Vascular, Inc. (LMAT), a publicly traded global provider of medical devices and implants for the treatment of peripheral vascular disease, and he is a member of its Audit and Compensation Committees. Mr. Roush also serves as a director of Targan, Inc. (formerly Applied Life Sciences & Systems), a privately held company that is developing automated vaccine delivery technology for the poultry industry. Mr. Roush previously served as chief executive officer and a director of Novanta Inc., (formerly, GSI Group Inc.), a leading global supplier of precision photonic components and subsystems to original equipment manufacturers in the medical and industrial technology markets, from December 2010 to September 2016. Mr. Roush joined Novanta after a twelve-year career with PerkinElmer, Inc., a provider of technology and services to the diagnostics, research, environmental, safety and security, industrial and laboratory services markets, where he was a corporate officer and served in several leadership positions. Prior to joining PerkinElmer, Mr. Roush held management positions with Outboard Marine Corporation, AlliedSignal, Inc., (now Honeywell International), McKinsey & Company Inc. and General Electric Company.
Member of the Compensation Committee
Member of the Nominating, Governance, and Sustainability Committee
Brian Shirley
Director since 2022
Brian Shirley
Director since 2022
Brian Shirley retired from Micron Technology, Inc., a global corporation that produces various forms of semiconductor devices, as senior vice president DRAM and Emerging Memory Engineering in December 2019. He joined Micron as a product engineer in 1988, and held positions of increasing responsibility across product design, engineering, and business unit management. Mr. Shirley is listed as an inventor on 82 U.S. patents and helped drive Micron’s expansion into specialized memory for servers, mobile and networking solutions, in addition to maintaining a focus on cost leadership and power reduction. After retirement from Micron, Mr. Shirley consulted for various U.S. government departments, advising on the semiconductor geopolitical landscape, supply chain resilience, and national security. Mr. Shirley holds a Bachelor of Science degree in electrical engineering from Stanford University.
Member of the Audit and Finance Committee