Our Leadership Team

Leon de Bruyn is the President and Chief Executive Officer for Lummus Technology, where he is responsible for the strategic direction of the company and leading all aspects Lummus’ global performance. He also serves on the board of directors of Chevron Lummus Global, a joint venture between Chevron and Lummus.

de Bruyn joined Lummus in 1993. During this career with the company, he has built executive experience in the downstream refining and petrochemicals industry, through technology development and licensing, catalyst supply and engineering, procurement and construction activities. 

Prior to his current role as CEO, de Bruyn led the transformation of the Lummus Technology business from a subsidiary of McDermott International to a standalone company under the ownership of The Chatterjee Group and Rhône Capital.  

Previously, he was Managing Director of Chevron Lummus Global, a joint venture with Chevron, where he was responsible for the company strategy, P&L, sales and operations for the supply of technologies, engineering services and catalysts to refineries. 

de Bruyn holds a master’s degree in business administration from Duke University’s Fuqua School of Business, and a master’s degree in chemical engineering from Eindhoven University for Technology in The Netherlands. He has lived and worked in eight countries.

Edosa Obayagbona was named Executive Vice President and Chief Financial Officer for Lummus Technology in 2024. In this role, he is responsible for leading all aspects of Lummus’ financial management, including the Accounting, Reporting, Audit, Tax, Treasury, and Investor Relations functions.

Obayagbona brings a wealth of experience and global leadership in financial management, capital markets, strategy and risk management. Most recently, he served as the CFO for Univation Technologies, a fully owned subsidiary of Dow Inc. (Dow).

Prior to Univation, Obayagbona served as CFO for Dow Latin America, Managing Director for Dow West Africa and CFO for the Dow India sub-continent region. He also served on the boards of directors for several of Dow’s joint ventures/portfolio companies. Before joining Dow, Obayagbona held global leadership roles of increasing responsibility in financial management at Koch Industries Inc.

Obayagbona holds a master’s degree in business administration from Clark Atlanta University in Atlanta, Georgia, and a bachelor’s degree in chemical engineering from London South Bank University in London, United Kingdom. He is also a Chartered Financial Analyst (CFA).

Norby ‘Buck’ Foss is the Chief Legal Officer for Lummus Technology, where he is responsible for overseeing all legal matters for the company.
 
Foss has more than 25 years of legal experience. Prior to his current role, he served as General Counsel for McDermott’s Lummus Technology business. He also served as CB&I’s Chief Intellectual Property Counsel, where he managed IP for all CB&I companies, negotiated and performed legal functions for all investment and divestment of intellectual property assets.

Foss is licensed to practice law in Illinois, New Jersey, Texas and before the United States Patent and Trademark Office. Prior to his legal career he served as an officer in the U.S. Navy.
 
He holds a bachelor’s degree in chemical engineering from Rice University in Houston, Texas, and a juris doctor from Chicago-Kent School of Law in Chicago, Illinois.

Ajay Gami is Lummus' Chief Commercial Officer. In this role, Gami is responsible for leading all aspects of sales, business development and portfolio expansion for the company. This includes developing and implmenting commerical strategy, growing the company's revenue, leading the global sales organization and overseeing investment, partnership and acquisition opportunities. Prior to this role, he served as Lummus' Chief Development Officer. 

Gami spent nearly 30 years with Lummus, from 1990 to 2018. During this time, he served in several technical and commercial roles and developed a deep understanding of Lummus’ technology portfolio. Prior to rejoining Lummus in 2022, Gami served as a Director and Board Member of INEOS U.S. Chemicals Co. where he was responsible for developing long-term business growth strategies focusing on potential collaborations, mergers and acquisitions. 

He holds a master’s degree in business administration from Rutgers University, a master’s degree in chemical engineering from the New Jersey Institute of Technology, and a bachelor’s degree in chemical engineering from the University of Baroda. He is also a registered professional engineer in Pennsylvania and holds three U.S. patents. 

Deepak Martin was named Chief Human Resources Officer for Lummus Technology in 2024. In this role, he is responsible for leading all aspects of Lummus' human resources, including talent management, global human resources operations, recruiting, learning and development, and compensation and benefits.

Martin has extensive global experience in talent management, culture transformation and organizational design. Prior to Lummus, he led human resources for the Dover Corporation's Clean Energy & Fueling segment, which included support for 6,000 employees in 30 countries.

Throughout his career, Martin has served in human resources leadership roles around the world and has gained experience integrating organizational culture, processes and systems, and designing people strategies to match business objectives and plans.

Martin holds a bachelor's degree from Baldwin Methodist College, and a master's degree in business administration and human resources from the University of Wales.

Ujjal Mukherjee is Lummus’ Chief Technology Officer (CTO). He is responsible for driving cross-company initiatives to enhance and grow Lummus’ existing portfolio and champion the company’s technology solutions to strategic customers. Mukherjee also leads the development of advanced technology solutions that place Lummus at the forefront of our industry, the energy transition and digitalization. Additionally, he serves as a Lummus Fellow, a distinguished role in which he helps lead the organization’s knowledge transfer and development initiatives in key technology areas.

Prior to being appointed CTO, Mukherjee served as Vice President and Managing Director of Chevron Lummus Global, a joint venture between Chevron and Lummus. He began his career with Lummus in 1990, and has developed expertise in clean fuels, petrochemicals and emerging technologies. He has 49 issued U.S. patents and many of the processes he invented have been successfully commercialized, including LC-MAX technology and integrated hydrocracking.

Mukherjee holds a bachelor’s degree in Chemical Engineering from National Institute of Technology in India, a master’s degree in Chemical and Petroleum Engineering from ENSPM in France, and a master’s degree in business administration from Rutgers University in the U.S.

Helion Sardina is the Senior Vice President of Emerging Technologies for Lummus Technology. In this role, he is responsible for supporting the sales and revenue growth for Lummus' emerging technology portfolio. Sardina has spent his entire career with the company, and most recently, served in executive sales and business development roles for Lummus. 
 
Through a series of positions with increasing responsibilities, he has developed functional expertise in technology evaluation, operations, sales and marketing, contracting, strategic planning, negotiating skills and general management. His previous roles included Vice President, Operations and Vice President, Petrochemicals Business Group.
 
Sardina holds a master’s degree in chemical engineering from the New Jersey Institute of Technology. He also holds two patents for Lummus technologies.

Lemoine spent eight years with Lummus, where he focused primarily on research and development, technology development and commercialization. He also held various R&D roles at ExxonMobil Chemical, Rentech and Sasol. Prior to rejoining Lummus in 2022, Lemoine served as Executive Vice President of Technology and Technology Support at Axens.   

Lemoine holds a Doctor of Philosophy degree in chemical engineering from the University of Pittsburgh and a diplome d’ingenieur in chemical engineering from ENSCL in France.