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 hydrocarbon and moisture dewpoints 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.