C. Brandon Holubar was raised in Irving, Texas. He obtained his undergraduate degree from Sam Houston State University in 1996. He then obtained his law degree from Oklahoma City University in 2002, and became licensed in Texas in 2003.

He practiced with a local firm in McAllen, Texas, for 10 years, focusing primarily on family law litigation and construction litigation. He is Board Certified by the Texas Board of Legal Specialization in Family Law.

He is a past Board Member of the Hidalgo County Bar Association and a Past Board Member of the Fellowship of Christian Athletes, McAllen, Texas.

He has been practicing with Gonzalez Castillo, LLP since November 2018, defending a variety of personal injury, medical malpractice, premise liability, and products liability cases.