Brennan Reilly and his wife Helena have lived in West University Place for more than 15 years. They have four daughters who currently attend The Arbor School, West U Elementary, Pin Oak Middle School, and St. Agnes Academy. They attend St. Vincent de Paul Catholic Church.
Brennan received a B.S. in Economics from Texas A&M University in 1991 and a J.D. with honors from the University of Texas at Austin in 1994. He was admitted to the Texas Bar in 1994. He owns his own law firm with a practice devoted to employee benefits matters.
Brennan is active in the West U Community. He is a past member of the West U Parks Board and the Rice Pocket Park Task Force. He is currently a member of West U Rotary, and has served as club treasurer, foundation treasurer, and board member. He is also a current member of the board of the Weekley YMCA, serving on the Outreach Committee. For the last ten years, Brennan has volunteered with the AARP Tax Aide program to prepare tax returns for free at the West U Senior Center. Brennan has also been active with youth sports, serving as a coach and coordinator for Houston Express (formerly West U) soccer club.