Petroleum Service & Calibration, Inc. was founded in May of 2000 by Jeff and Jean McCrary. 

Jeff began his petroleum career at the age of 16 shoveling pea gravel on the construction side of the business.  His curiosity into the testing standards, in 1986; moved him yet again to further his career.  Jeff’s knowledge of testing regulations; laws, rules and requirements has grown tremendously and tank owners depend on him on a daily basis.   Jeff currently serves on multiple boards and committees which write testing regulations.

Jean brought the office knowledge and business know-how to build a company where clients receive quality customer service.   Her background and education in Human resources and business administration allowed for PS&C to build a support staff that makes PS&C the place to work in a home atmosphere; while being in a corporate office

With a desire to move Petroleum Service & Calibration into the next level from small business to national capacity; Jeff and Jean McCrary were introduced to Bo Sasnett of D & H United in June of 2022.  Jeff and Jean had been courted by many companies over the past 3 years that tried to purchase our outstanding company.   However, the McCrarys were determined to find the piece of the puzzle that fit perfectly.  On December 1 2022; PS&C merged with D & H United and the puzzle was now complete.