With over 250 years of process  engineering and project management experience, you can rest assured that your project will be designed to operate efficiently, built cost effectively, and done so with safety as our number one priority.


John Dunlap, PE – Senior Process Engineer

John is responsible for designing facilities utilizing computer process simulators, developing P&ID’s, equipment sizing/ratings, participating in HAZOP reviews, and writing startup and operating manuals.  Prior to assuming his current role at Engineering, Procurement & Construction, Inc. (EPC) in 2005, he was responsible for providing technical support for all of Crosstex Energy Services, L.P. gas processing assets in Texas, including managing a 60 MMSCFD cryogenic plant expansion .  He began his career in 1983 with Warren Petroleum Company, which was subsequently acquired by Dynegy, where he held a variety of operations and engineering positions at numerous locations in Texas and Oklahoma.  John earned a Bachelor of Science Degree in Petroleum Engineering from The University of Missouri-Rolla.  He has been a registered Professional Engineer in the state of Oklahoma since 1990.


Greg Jokerst - Process Engineer

In 2014, Greg accepted a position as a process engineer for EPC, designing facilities for the energy industry.  He earned a Bachelor of Science Degree in Chemical Engineering from Purdue University in 2001.  After acquiring over ten years of experience in chemical process operations and development, he began process design for capital projects with the firm Ford, Bacon, & Davis. He enjoys deep sea fishing, European sports cars, and everything Japanese.  


 Pat Brown - Project Manager/Senior Mechanical Engineer

Pat joined EPC in 2012 to act as project manager and perform various mechanical engineering duties. Pat has over ten years of mechanical engineering experience in  the oil and gas industry while working primarily for Chicago Bridge & Iron (CB&I) and has managed projects for EPC ranging from small MRUs to 200 MMSCFD cryogenic plants.  Pat earned his Bachelor of Science Degree in Mechanical Engineering from LeTourneau University in 2002 and is currently seeking a Masters of Engineering Management Degree with a focus in Oil and Gas from LeTourneau University. In his free time, Pat enjoys relaxing with family, teaching Sunday School, volunteering, and watching the Texas Rangers (most of the  time).


Mark Whitt - Project Manager 

Mark is a project manager at EPC with over thirty-five years in the petroleum industry. Mark has a  background in instrumentation, controls, operations, and served many years as a supervisor for an engineering and design group. Mark has worked in refineries, gas treating units, sulfur plants, and with proprietary technologies. Mark has worked with most of the major petroleum companies and his work has taken him to many different countries throughout the world. Mark enjoys antique cars and performance driving.