Dennis E. Gregg ’50

PE Hall of Fame Class of 2022

Dennis E. Gregg helped develop an integrated project management protocol that became the industry standard for large offshore oil and gas fields.

Gregg graduated from Mines in 1950 with a professional degree in petroleum engineering. After graduation, he began a 43-year career with Conoco, rising up the ranks to vice president, International Exploration and Production.

He was a key figure in the company’s growth into a major international integrated energy company. He led projects and operations all over the world, including several of Conoco’s multi-billion-dollar integrated deepwater development efforts. He authored several articles about his novel approach to managing these mega-projects, which saved billions of dollars and essentially eliminated time overruns. The articles have become guiding industry standards that are still largely followed today to develop remote, hard-to-access reserves that otherwise would never have been produced.

After retirement from Conoco, Gregg continued working in oil and gas as a director or executive at several independent exploration and production companies.

Professional Societies

  • President, Society of Petroleum Engineers
  • Chairman, Society of Petroleum Engineers Foundation
  • Chairman, 1992 Offshore Technology Conference


  • Distinguished Achievement Medal, Colorado School of Mines
  • Distinguished Member, Society of Petroleum Engineers
  • Honorary Member, Society of Petroleum Engineers (awarded to 0.1 percent of members)

DeGloyer Distinguished Service Award, Society of Petroleum Engineers-AIM