Sue Weisenburger has over twenty-five years of experience as a Process Engineer completing projects from the conceptual phase through to construction, start-up and commissioning. Sue has worked on or led the process engineering and design for multiple upstream oil and gas, midstream and refining facilities including wellpads, gathering systems, central processing plants, terminals, tank 

farms, compressor stations, gas plants, NGL recovery, turbo-expanders, fractionation, condensate stabilization and gas treating. Her key project experience includes the development of innovative designs for standard well pad and compressor stations; a 35,000 bpd fractionation plant; a 150 MMSCFD gas plant expansion; and two 400 MMSCFD turbo-expander plants. She has extensive knowledge of ASME, NFPA, API, ANSI and other common industry codes and standards. 


He was an accomplished golfer and has been recognized in the Book of Golf for his many holes-in-one.​  He was a World War II B-17G pilot and flew several bombing missions over Germany before being shot down and captured as a POW.  After 13 months as a POW, he was freed by General Patton.  He was awarded a purple heart.  More details on his war experiences are available by request.

​Bart Carpenter has 40 years of process engineering, consulting and management expertise in petroleum refining, gas processing, and industrial biotechnology.  His downstream experience ranges from chief process engineer to corporate roles in operations planning and strategic management.  He is also well versed in a variety of biofuel technologies.  ​Mr. Carpenter has extensive optimization

George Denavit, P.E. , has over 35 years experience in the design and purchase of mechanical equipment for the process industry. He is a recognized specialist in heat transfer engineering and coordinates engineering requirements with other engineering disciplines. He interfaces with clients and subcontractors to ensure quality product and service from initial specification through fabrication and field checkout.

In God We Trust -- quite simply, on the outside looking in, we chose likely the worst time in the last 30 years to start an engineering/consulting firm. The decision was not made lightly and it took a struggle of walking in faith versus having the security of a paycheck. In the midst of the worst downturn in over 30 years (2nd quarter of 2016), we followed His leading and I decided to voluntarily quit my job to start this endeavor. Melissa said it best, "God's got this."  She was right. We're thankful and continue to say "In God We Trust", because we do.

​Braedy Tanner graduated from Colorado School of Mines in 2020 with a MS in Engineering and Technology Management. He holds a BS in Chemical Engineering from the same institution. Braedy spent two years during his undergraduate studies as a researcher with the Center for Hydrate Research, focusing on the rheology of low-pressure clathrate hydrate systems.  During this time, he 

developed an innovative visual rheometer cell, allowing for visualization of hydrate development in rheological systems. 

​Eric Parvin, PE, Owner/President, began his career in 1997, primarily as a contracting engineer in his hometown of Baton Rouge, Louisiana. After a client-request to relocate to Denver in 2009, he became a Senior Process Consultant and later Process Engineering Department Manager.   

(View resume here).

experience and is skilled at combining business needs with technology to create high-value projects.  He continues to support the University of Colorado​ by mentoring students and serving on the Advisory Board for the Dept. of Chemical and Biological Engineering.  (View resume here).

Where we've done work or currently working:

Eric’s leadership at Parv Process Consulting & Engineering brings expertise in refining, midstream, upstream, salt domes as well as feasibility studies, detailed design and independent technical reviews.  He offers creative ideas for improving plant performance using sound engineering principles through energy optimization, capital cost reduction, and reduced operating costs.  

Eric also served as an adjunct professor at Colorado School of Mines in Golden, CO, instructing on fractionation train design. Eric has a passion for equipping the next generation of chemical engineers. Parv Consulting is proud to offer training services, from informal lunch-and-learns to interactive seminars in topics like refining, distillation and unit operation designs.  

Jackson Dostie is recent graduate of the University of Colorado-Boulder with a BS in Chemical Engineering. Jackson has process engineering experience in high-speed manufacturing environments as well as design of gas processing and carbon capture facilities. He is passionate about delivering dynamic, sustainable solutions to challenges within the oil and gas market. 

​Our Namesake

S. A. Parvin, "Parv", was my grandfather.  A man who stood for honesty, loyalty, friendship, integrity, and perseverance.  He always strived to earn and keep a good reputation by treating others fairly and with respect.  He always made you feel like the most important person in the room.  It is those same values that we aim to uphold within Parv Consulting.