Diaz's professional journey began with a stint in law practice along the Gulf Coast, laying the foundation for a distinguished career in public service. From 1988 to 1994, he served as a representative in the Mississippi House of Representatives, specifically in District 116, which comprises the cities of Biloxi and D'Iberville. Throughout his seven-year tenure, Diaz held various leadership positions, including subcommittee Chairman for the Insurance Committee and the Judiciary Committee. His impressive portfolio also included membership on the Ways and Means Committee and Secretary for the Constitution Committee. Furthermore, he served as City Attorney for the City of D'Iberville for four years, demonstrating his expertise in both state and local governance. Diaz's remarkable achievements in the legislative arena paved the way for his subsequent appointment to the Court of Appeals in November 1994. He served in this capacity until March 2000, when he was appointed to the Supreme Court by Governor Ronnie Musgrove. In 2000, Diaz secured an eight-year term on the Supreme Court, commencing January 2001, solidifying his reputation as a prominent figure in Mississippi's judicial system.
