Partial Client List

  • Air Products
  • Amerada Hess
  • Anadarko Petroleum Co.
  • ARCO Chemical Co.
  • B.F. Goodrich
  • Baker Hughes
  • Baker Petrolite
  • Bharat Petroleum Corporation Ltd.
  • BP
  • Braven Environmental, LLC
  • Brown & Root
  • Chinese National Petroleum Company
  • Cooper Energy Services
  • Delek US
  • Dolphin Energy
  • Drilex
  • Dynegy
  • Ecopetrol
  • Enichem Elastomers
  • Fina Oil & Chemical Co.
  • Formosa Plastics
  • Fugro-McClelland
  • G.E. Lighting
  • GNI Group, Inc.
  • Goulds Pumps
  • Hoffman Engineering
  • Houston Integrity
  • I.Q. Products
  • International Specialty Products
  • John Brown
  • Johnson Controls
  • Kilpatrick
  • Lubrizol Petroleum Chemicals Co.
  • Lyondell Petrochemical Co.
  • Lyondell-Citgo Refining Co.
  • Mannesmann Pipe and Steel Enterprise Transportation
  • Nalco-Exxon Energy Chemicals
  • Pathfinder
  • Procycle Oil
  • PumpWorks Industrial
  • Rhodia Co.
  • RVS Services
  • Sandoz Agro, Inc.
  • Schenectady Chemical Co.
  • Shell
  • Simpson Paper Company
  • Solvay Polymer Corporation
  • Stone & Webster
  • Texas Steel Conversion
  • TRC Services
  • Westlake Polymer Corporation
  • Zubair



Naddir Patel

Sinclair Oil Corporation
I just used your HTHA calculator yesterday, and the graphs and calculations were excellent.
March 10, 2022

Boyd McKay

I have worked with David on a number of engineering and inspection projects in the oil, gas and chemical industries. David has a very broad and deep materials, corrosion and failure analysis experience. This knowledge and experience, combined with David's ability to deliver, has provided exceptional value to clients.
January 24, 2013

Dane DeRouen

David is very knowledgeable and experienced in metallurgy and failure analysis. Plus, he has experience in operating plants. David drills down into the root cause and offers practical recommendations for corrective actions. I have used The Hendrix Group for a number of analyses and have been pleased with the results.
November 14, 2012

Gurudeep Rao

I worked David for development of Corrosion Control Documents for a Refinery here in India. We ran into a few problems with the schedule and data requirements considering the age of the Unit. David conducted a Corrosion workshop at the client site and was able to deliver the Corrosion Control Documents without any delay. David would not allow any compromises on the quality of the delivery and stressed a lot on organizing the work. His in depth knowledge of the subject enabled us to foresee potential issues and come up with effective resolutions. He is a strong believer in knowledge sharing and can be an excellent mentor. Last but not the least, his cool temperament helped us convert a "red hot" client to a satisfied customer.
July 31, 2012

Srivandana "Sri" Vuppala

Mustang Engineering
David is great to work with on Risk Based Inspection. Technically, he is very competent in RBI and has a great working knowledge of damage mechanisms and problems that typically occur within the Refinery Industry. He is also personable, knowledgeable, and honest. I thoroughly enjoyed working with him.
July 5, 2012

Vipin Nair

I've known David for two months. We are associated with each other for a project on CCD for an Indian client. The first and foremost attribute of David is the confident way he approaches the project. The project in which I was involved with him was a very tightly scheduled one, but his approach was remarkable. He can stand on his feet and deliver in front of the client which shows his depth in technical knowledge. Also, to mention is the quality of his report. It is very detailed and contains a lot of process and operating parameters. I should also comment on his amicable sense of humor, which enables him to make any tense environment into a pretty light one. We hope to work on future projects too.
June 24, 2012

Steven DeVillier

Inspection Consultant
David work with me as materials consultant where he provided support. He was both accommodating and flexible with the project scope. He would also spend time explaining and teaching the project team when requested in regards to his area of expertise. Very open minded in listening to others for improvements.
January 5, 2012

Leslie A. Ward, PMP

Top Qualities: Personable, Expert, Good Value
“David has worked for me and / or my company (Siemens) as a sub-contractor on multiple projects that deal with mechanical integrity, corrosion and metallurgy. He is very experienced in the areas of failure analysis and Risk Based Inspection (RBI). David is willing to travel on short notice and / or to international locations. We have similar philosophies on how to implement a successful mechanical integrity program for fixed equipment in the refining and petrochemical industry. David is great to work with as he is always willing to share his knowledge with others.”

February 2011

Michael Carter

Top qualities: Great Results, Personable, Expert
“The Hendrix Group provides exceptional services in the area of petrochemical mechanical integrity, failure analysis, and corrosion engineering.”

January 14, 2011

John Tischuk

Houston Integrity
Top qualities: Great Results, Expert, High Integrity
“David is a highly professional engineer who always produces excellent results.”

January 14, 2011

Loyd Taylor

WH Laboratories
Top qualities: Great Results, Personable, Expert
“David works with us as a professional engineer, failure analyst, materials/corrosion engineer and consultant. His knowledge, experience and insight provides him with the ability to grasp complex situations and to quickly and accurately identify the root cause of a problem and recommend appropriate solutions.”

March 23, 2009

Norman Ritchie

Ritchie & Partners, LLC
David is technically expert, able to handle large and complex projects with multiple partners, accurate and trustworthy in handling litigation support activities.

March 19, 2009

Stacey Moore

Top qualities: Great Results, Expert, High Integrity
“David supported my team on several projects. His work is exceptional, and when he's involved, you can count on a finished product that is second to none! I highly recommend The Hendrix Group.”

March 11, 2009


Contact Us

If you have questions or need our depth of experience to help with your issues...

Call us: 713-993-7007

Email us:


With a little delay, our Calculation of Ammonium Salt Deposition more
Our sulfidic corrosion calculators are now available at more

Stay Current

Sign up for our quarterly newsletter

covering updates on corrosion

Sign Up