In 1976, Sharp received a master's degree in Public Administration from Texas State University in San Marcos while working full-time in Austin with the Legislative Budget Board. In 1978, Sharp returned to Victoria, Texas, where he opened a real estate firm with partner and former County Commissioner Gene Martin and became a successful small business owner. That same year, he married Charlotte Sharp. The couple has a son, Spencer, and a daughter, Victoria. The Sharps are involved in many community and humanitarian efforts, including airlifts of Jewish families to Israel from Ukraine and Russia.