About Us

Experts in Water Dewpoint Measurement and Hyrdocarbon Dewpoint Measurement

ZEGAZ Instruments is an advanced technology firm located in Ijamsville, Maryland. Its focus is the development of next-generation of advanced diagnostic systems for the natural gas industry to measure moisture in natural gas.


Sohrab Zarrabian, Ph.D., CEO
Dr. Zarrabian has over 25 years of technical and business management experience. Before founding ZEGAZ Instruments, he was the CEO of Maxion Lasers (Acquired by Physical Sciences). Prior to joining Maxion, he was the CEO at YAS Photonics, Inc., an early stage startup focusing on optical diagnostics. Previously, he was Senior Director of Product Management at the Newport Corporation where he led product management activities at the Advanced Photonics and Automation Division. His experience also includes senior technical and business management positions at JDSU and BOC group (now part of Linde). Dr. Zarrabian conducted academic research in the areas of molecular interactions and optical spectroscopy before embarking on his industrial career.

He is the author of numerous scientific papers and conference presentations. He also holds several patents.

Dr. Zarrabian received an MBA degree from Columbia University in New York and a Ph.D. degree from University of Florida.

John Hamilton, VP of Engineering
Throughout his career, Mr. Hamilton has held a variety of managerial positions in engineering at various companies including Exxon, ADP, Cray Communications, and Advanced IC Engineering. Currently, he is the CEO and Chief Engineer of Advanced IC Engineering. He has worked with ZEGAZ Instruments as a consultant since 2006. He was named Vice President of Engineering in 2012.

Mr. Hamilton brings together a unique blend of experience that covers all aspects critical to a new product from the design to the field maintenance to the customer.

Originally from Harrisonburg, Virginia, John Hamilton holds a B.Sc. in electrical engineering from Virginia Polytechnic Institute and State University (Virginia Tech).

Maryam Zavar, VP of Sales and Marketing
Ms. Zavar has over 20 years of experience in various roles including sales and marketing management as well as research and development. Prior to joining ZEGAZ Instruments, she was the Proteomics Specialist at Thermo-Fisher Scientific. Her previous experience includes sales and marketing roles at Sigma-Aldrich and Quantum Biotechnologies. She started her career as a molecular biologist conducting breast cancer research.

She holds an M.Sc. From Georgetown University and a B.Sc. from University of Maryland.

Additional Members of Board of Directors

Kazem Kazempour, Ph.D.
Dr. Kazempour is the president and co-Founder of Amarex Clinical research. He brings more than 30 years experience in research and development, and management. Prior to founding Amarex, he served as Global Senior Director for an international pharmaceutical company. While in this position, he was responsible for the global standardization of biostatistics, scientific programming, and data management procedures.

Dr. Kazempour has received multiple recognition awards from the FDA for his contributions in drug approval process, in particular for HIV and AIDs trials. He has been active in the biomedical research community throughout his career as an organizer, a panel discussion member, and presenter at national and international meetings. He has made presentations to FDA, and FDA advisory committees on more than 30 different drugs. Dr. Kazempour has authored numerous published articles and technical reports.

He holds a Ph.D. in Statistics from Colorado State University.

Board of Advisers

Dawson Horn, J.D.
Mr. Horn is an experienced attorney with a law firm and in house career. He has a background in litigation as well as transactional matters. Most recently he was Senior Litigation Counsel at Tyco International where he managed large toxic tort/product liability docket, insurance recovery docket and complex litigation docket. At Altria (Philip Morris), he successfully managed its defense in the multi-billion dollar RICO case brought by the Department of Justice. At Scott Paper he managed the company’s defense in breast implant class action litigation and navigated its related insurance issues. Mr. Horn’s litigation training began at the well respected Pepper Hamilton firm where he gained first chair trial experience and worked primarily on insurance and antitrust cases. This extensive litigation background causes him to keep current on a range of related issues, such as the evolving law of discovery, internal investigations and a recent focus on risk management/compliance issues.

With regard to transactional matters, Mr. Horn performed M&A responsibilities at a publicly traded start up (United Auto Group) and served as procurement counsel for Scott Paper and Campbell Soup.

His law degree is from Duke University School of Law and his undergraduate degree (Public Policy and Political Science) is also from Duke.