About Us

At Tech Cal, we pride ourselves on outstanding customer service, proven products and ethical practices. It is our mission to provide our customers with reliable and affordable services and products, such as mechanical test equipment calibration, repair, sales, rentals, and new Tech Cal Recorders.

Tech Cal proudly serves an array of business fields, such as:

  • Pipeline Testing
  • Oil & Gas
  • Manufacturing
  • Aerospace
  • Trades and Landscape Services

Our management and skilled technicians, who operate our cutting-edge calibration lab and manufacturing facilities, have nearly 70 years of combined experience in calibration and manufacturing services, making Tech Cal an industry leader in high quality products and performance.

Our technicians are extensively trained, with lessons meant to arm them with the tools they need to succeed as a Tech Cal technician.

All technicians are required to have at least 1 year of experience before working on their own and assisting our customers. Our training programs are designed with our customers in mind. Tech Cal is committed to ensuring that our technicians are highly trained, knowledgeable, and experienced in order to provide you with the best possible service and support.

The History of Tech Cal

Established in 1984, Tech Cal began as a small operation providing customers with equipment calibration and repair services. Over the years, Tech Cal blossomed into a thriving, multi-faceted operation offering not only calibration and repair services, but also equipment rentals and sales.

In 2006, Tech Cal gave the existing industry standard chart recorder a complete overhaul thanks to the vision of Operations Manager, Grady Green, Jr. Grady was instrumental in the design, development and execution of the Tech Cal Recorder, creating a product that is lighter, more accurate and more durable than any chart recorder on the market.

With success of the new Tech Cal Recorder, and the general expansion of services, Tech Cal outgrew its original facility. In 2008, Tech Cal made the strategic decision to design and build a new, state of the art calibration lab and manufacturing facility. Tech Cal quickly tripled its employee count in order to keep pace with rising demand.

With over 30 years of experience serving the industry, Tech Cal strives to build relationships with its customers and deliver excellent, expeditious service. Our mission has been and remains to provide customers with products they can rely on, personnel they can trust and quality service.

Meet Our Team

Nick Green

President – Signed on in 1997

Nick joined Tech Cal in 1997 as a calibration technician, and in 2000, he became a managing partner and Vice President of the company. In 2014, Nick purchased the remaining portion of the company, and now serves as our President and CEO. He provides sales and technical support to our customers, while also overseeing day-to-day operations of the company as a whole.  He strives to provide our customers with superior service and prides himself on ensuring our customers are completely satisfied with Tech Cal’s service and products.

Nick enjoys spending quality time with his wife, Kerri, and daughter, Ashlyn. He is also an avid outdoorsman and loves to hunt and fish. He can often be found on the water or in the field with his dog, Blue. Blue is a true “man’s best friend” and is always at Nick’s side. He serves as Tech Cal’s mascot.


Grady Green, Jr.

Operations Manager – Signed on in 1999

Grady joined Tech Cal in 1999 after serving as an inside sales agent in the industrial distribution field. He acts as Tech Cal’s Operations Manager and is head of design and development of Tech Cal Recorders. Grady strives to provide our customers with personable and expeditious service, while maintaining the quality and integrity that Tech Cal is known for.

When he isn’t hunting or fishing, Grady enjoys spending time with his wife and children.


Hayley Dyer

Accounting Manager – Signed on in 2008

Hayley joined Tech Cal in 2008 and serves as Tech Cal’s Accounting Manager. She is responsible for all matters of accounting and collections, and ensures all customer transactions are fulfilled timely and with respect to our customers. Hayley also ensures that Tech Cal consistently remains in excellent standing with our vendors. She is the voice you hear when calling Tech Cal.

Hayley enjoys spending time with her husband, Jeremy, and her family. They can often be found at her family’s beach house on the weekends, where they always find time for fishing. Hayley enjoys going to concerts and relaxing at her home in Deer Park.


Abby Stepchinski

Quality Manager – Signed on in 2015

Abby joined Tech Cal in January 2015 after working as an offshore safety and project management consultant for several years. She is a graduate of Texas A&M University and holds a degree in Maritime History and Nautical Archaeology. Abby serves as our Quality Manager and strives to provide our customers with great service while continually improving Tech Cal’s management system.

Abby enjoys spending time with her family, reading and traveling. She can often be found working on DIY projects and home renovations for family and friends. She has 2 coonhounds and a Cane Corso Italian mastiff.


George Zavala

Assembly Team Lead – Signed on in 2010

George joined Tech Cal after working for almost 30 years in fabrication and machining in local machine shops. He has worked at Tech Cal since 2010 and serves as head of Tech Cal recorder assembly and production. George works efficiently and diligently to ensure that all Tech Cal Recorders are built with precision and accuracy.

George enjoys playing the Xbox and spending time with his kids.


Cory Parinello

Calibration Team Leader – Signed on in 2014

Cory joined Tech Cal in 2014 after earning a bachelor’s degree in business administration from Sam Houston State University. He currently serves as Tech Cal’s Calibration Team Leader and works efficiently to ensure that quality is maintained while keeping turnaround time consistent.  

When he isn’t at work, Cory enjoys spending time with his wife, Audrey, and his 2 dogs, Lincoln and Bentley.