Hennessey Hall of Fame Inductees 2024


Hazen Marshall is a proud graduate of Hennessey High School (Class of 1983) and Oklahoma State University (Class of 1987).

Hazen is one of Washington DC’s top policy experts, with three decades of legislative policy experience, including over twenty years in the Senate as a senior leadership aide and fifteen years providing strategic consulting and lobbying services to Fortune 100 businesses and trade associations.

Following graduation, Hazen moved to Washington, D.C., where he began his career working for Senator Don Nickles (R-OK) from 1987 to 2004. He served as Staff Director for the Senate Budget Committee and Chief of Staff to the Assistant Republican Leader. During this period, Hazen worked on most of the major budget, tax, and economic policies of the era.

When Senator Nickles retired, Hazen became a founding partner of the Nickles Group, where he spent a decade advising clients in various sectors, including energy, taxes, telecommunications, insurance, defense/aerospace, and the automotive industry.

In 2015, Hazen returned to the Senate as the Policy Director for Senate Majority Leader Mitch McConnell (R-KY), a role in which he participated in the planning and execution of all Senate Republican legislative and political strategies.  Highlights of this period of service included the enactment of historic tax reform and confirming a conservative majority on the Supreme Court.

In 2019, Hazen retired from the Senate and is currently working as a founding partner of the consulting and lobbying firm Marshall & Popp.


Dr. Jack Collier attended Hennessy public schools from kindergarten through 12th grade, graduating in 1989. 

Dr. Collier attended the University of Oklahoma, receiving a Bachelor of Science Degree with distinction in Psychology, and was recognized as the Outstanding Psychology Student. He was President of the Alpha Lambda Delta Honor Society and Chairman of the Crimson Club. He was awarded Top Ten Freshmen, Big Man on Campus, and Homecoming King Finalist.

After graduation, Dr. Collier attended the University of Oklahoma College of Medicine.  He and two colleagues created the first online educational website for the medical school. Dr. Collier served as the president of his class and later president of the medical school student body.  His class voted him the Podalarian Award winner.

After graduating from medical school, Dr. Collier did his internal medicine residency at the University of Arkansas.  He was recognized as the Outstanding Intern of his class and later served as Internal Medicine Chief Resident.   

He completed his Cardiology Fellowship at Saint Louis University and received the Academic Achievement Award.

Dr. Collier returned to OU for his electrophysiology fellowship.  Upon completion of the program, Dr. Collier got his first official job as an electrophysiology attending at Saint Louis University, a mere 16 years after graduating high school.

Dr. Collier moved back to Oklahoma and practices at the Oklahoma Heart Hospital, where he has served on the board. He has been active in clinical research, including a publication in the esteemed New England Journal of Medicine. 

Dr. Collier’s most important accomplishment is his marriage to fellow medical student and best friend Dr. Susannah Lambird Collier. They have been happily married for 26 years and have three children, Ford, Price, and Coffey.  Despite his achievements, Dr. Collier’s favorite titles are husband, dad, and coach.