Executive Team About Us



Gregory Hallahan – Chief Executive Officer  

Greg has over 16 years of experience in the oil and gas industry. Before joining ProSep, Greg worked with Schlumberger Oilfield Services and rose to the Field Service Manager position, overseeing 3 Well Services crews and 80 employees with over 100MM USD of yearly revenue. Greg started as the Product Development Manager for ProSep, leading the innovation of ProSep’s proprietary technologies out into the market place. Before becoming CEO, Greg was responsible for Business Development and Operations as COO. Greg has a B.S. in Chemical Engineering from the University of Pennsylvania.

John Sabey – Chief Technical Officer 

John has a strong technical background with over 26 years of experience in the upstream oil & gas industry. John has held management and executive positions at Kvaerner Process Systems, Baker Hughes and ProSep prior to its acquisition. 

Karima Sundrani – Director of Finance and Accounting 

Karima is the Director of Finance and Accounting at ProSep and is responsible for providing financial leadership to achieve strategic goals and objectives of the company.  In this capacity, she ensures sound financial planning, financial statement integrity and compliance using best practices for the company. Prior to joining ProSep in 2019, Karima worked in finance leadership positions for growth and multinational companies. Karima’s experience includes financial planning and analysis and various controllership roles at General Electric from 2008 – 2015. Before joining General Electric, Karima did SEC reporting at Halliburton and led financial statement audits at PricewaterhouseCoopers.   Karima holds an MBA from Rice University and a BBA from the University of Texas at Austin.   

Raul Gonzalo – Director of Sales and Operations 

Raul joined ProSep in 2014. He has over 5 years of experience in the oil & gas industry where he has served as Project Engineer, Project Manager and Field Service Engineer in process solution equipment and manufacturing facilities. Raul also has extensive knowledge in project management, engineering mechanical design, process design and field service start-up/commissioning in onshore and offshore oil & gas production equipment. With a BA in Mechanical Engineering, Raul is also fluent in English, Spanish, and Portuguese. 

Caleb Smathers – Director of Product 

Caleb joined ProSep in 2012 and has more than 10 years professional experience. Specializing in product development and product to market strategy and execution for ProSep Caleb has a track record for developing and field testing process separation technologies within the oil and gas sector. Caleb has a Bachelors in Chemistry and Biology, from Westminster College. 

Mahesh Konduru – Chair (Non-Executive) of the Board of Directors 

Mahesh has 16+ years of experience in the energy sector, previously serving as ProSep’s Head of Operations, Chief Financial Officer, and Chief Operating Officer. Mahesh’s experience includes Corporate Governance, Capital Raising, Partnership Development, Financial Operations, Public-to-Private Acquisition Transactions, Commercial Resolutions, Engineering Operations, Private Equity Investing, and Product Development. Prior to ProSep, Mahesh was Principal at the Potomac Energy Fund. He has also worked at Johnson Matthey, Braemar Energy Ventures, and at the Loan Guarantee Program of the US Department of Energy. Mahesh holds an MBA from the MIT Sloan School of Management and a Ph.D. in Chemical Engineering from the University of Akron. 


ProSep’s board of directors consists of individuals with significant background and successful experience in the energy industry. The directors are responsible for instituting and ensuring compliance with best in class corporate governance framework at ProSep.  The corporate governance framework includes the Audit Committee, Compensation Committee, and the Intellectual Property Committee.


  • Greg Hallahan, CEO, ProSep 
  • Mahesh Konduru – Chair (Non-Executive) of the Board of Directors, ProSep
  • Einar Gamman, Senior Partner, EVPE 
  • Shantanu Agarwal, Founder and President, Susteon 








If you have any questions or would like to inquire about our products or services, please use this button to contact us.

Contact Us

Subscribe to our mailing list for news & updates about ProSep and our new era of process separation solutions.

Sign up now