Meet the Team

Jeff Headshot

Jeffrey D. McCrary


From 1984 he began building gas stations at the young age of 16; shoveling pea gravel on construction sites. His curiosity into the testing standards in 1986 moved him yet again to further his UST testing career. Once again in the 1990’s he found another great leap into the management of a UST company. These skills are what have made PS&C a company he is proud to call his own.

Jeff’s knowledge of testing regulations, laws, rules and requirements have brought tremendous customer relations and outcomes to tank owners during state inspections and also in their own personal growth and knowledge of what is required by them. Jeff is always willing to go the extra mile for his customers in ensuring they are not paying for un-needed or required services.

Jeff is co-owner of PS&C, along with his wife Jean McCrary and together they have built PS&C to be a company of integrity and top notch customer service for 20 years!

"If it wasn’t hard, everyone would do it. It’s the hard that makes it great!” - Tom Hanks

Jean Jenkins McCrary

Human Resources

Human Resource & Business Administration background and degrees allow Jean to maximize her skills in these fields of PS&C’s operations.
Jean’s background includes the UST field and banking. She brings this experience with her daily into the operations side of the company.

Jean is co-owner of PS&C, along with her husband Jeff McCrary and together they have built PS&C to be a company of integrity and top notch customer service for 20 years!

"There is no “I” in team but there is in win!” - Michael Jordan

Robert A. Travis


IT manager and lead application developer. He has been working with computers for over 30 years. He is an A+ certified technician and previously ran an IT consulting business. Working closely with office staff, in-field technicians, and our customers, he builds and improves upon UST-Comp, our custom in-house compliance testing and management application."

He has been with Petroleum Service & Calibration, Inc. for over 2 years.

"There is a principle which is a bar against all information, which is proof against all arguments, and which cannot fail to keep a man in everlasting ignorance—that principle is contempt prior to investigation." – Unknown

Rhonda S. Ripper

Office Manager/AP/AR

Rhonda started her journey with Petroleum Service & Calibration in March, 2011. She began overseeing all the administrative functions in the office as Office Administrator and now holds the position of Office Manager. Rhonda brings 25 years of customer service experience and delivering outstanding customer service has always been an essential part of a day’s work for her. Around the office she is known as “Inspector Gadget”. She identifies and solves PS&C’s office cases of where did we put that or does anyone remember the facts!

She is a native of Illinois moving with her family in November 2007 to sunny North Carolina. She looks forward to vacationing every year at a sunny beach with her husband. They also both enjoy Country Music.

“I like people who are loyal to me, and I like to be loyal, too”. - George Strait

Mary C. Koehler


A Native New Yorker whom along with her family decided to leave the cold winters and move to North Carolina in the spring of 2000. She has held positions in the NASCAR Cup industry and still enjoys going to the races, Worked for a company that flew FedEx planes up and down the east coast and throughout the Caribbean. She and her husband both enjoy cruise vacations and have plans to retire to the beach in the next few years.

She has been with Petroleum Service & Calibration for 6 years now as the Quality Assurance/Quality Control Analyst.

She keeps the office coffee pot full and always ready to lend a hand. She’s also a bit of a Parrot Head.

"Wrinkles only go where smiles have been” - Jimmy Buffett

Zachary S. Elliott

Technician Supervisor/Scheduling/Customer Support

Zach was born and raised in the Lake Norman, NC Area where PS&C is located. He attended and graduated from a local high school and then attended college where he played one year of collegiate football. After a few additional semesters he decided to pursue a career in law enforcement. However, due to an unforeseen hiring freeze, he began searching for jobs in other field. In 2008, he met Jeff and Jean McCrary.

At that time, he joined the PS&C team as an in-field technician, and after 10 years of running the roads and learning all he could, he was moved into the office to become the Technician Supervisor. With his experience in the industry and the leadership skills he developed as a quarterback, he provides our technicians with the guidance and training they need in order to provide customers with the excellent service they deserve.

“Discipline equals freedom!” - Jocko Willink

Robert W. Miller

Chief Operations Officer

Rob has been with the PS&C team since February 2011. Before beginning his career at PS&C, Rob had spent most of his adult years researching and writing as a college student. After earning both his Bachelor's and Master's Degrees, he worked a little over one year as a Corrections Officer near the SC coast. Following a move back to his hometown, Rob began working at PS&C where he started as a technician. In 2014, due to timing and circumstance, Rob transitioned to the office, where he has served since. His experiences in the field and office along with his research skills, and up to date understanding of UST regulations make him a valuable asset to you our customer.

“Work hard in silence, let success be your noise” - Frank Ocean

Colton L Beard


Colton joins PS&C has a local  resident of “Pumpkin Center”; a small community of Denver NC.    Hard work is no problem for Colton, one of the things that make him a valuable team player with PS&C coming from a work ethic instilled in his high school and college years in plumbing and construction; with this family.

Colton attended North Lincoln High school for four years and was blessed enough to become a Scholarship Athlete at Wingate University playing football for 4 years and pursuing my degree. Graduating with a B.S. in Criminal Justice; with dreams of becoming a Game Warden before tearing my  my ACL in the last season of my career in football.  At this time; life should me a different plan.

Finding my first professional job career at PS&C has allowed me to become an active member of a support team using skills and studies that I obtained during my time at Wingate.

I am thankful and fortunate enough to have PS&C as my 1st professional job!

"I walk by faith even when I cannot see."

2 Corinthians 5:7