Aj Castillo brings over two decades of leadership, service, and integrity to the real estate industry. With 23 years of experience as a public servant, including his role as a Senior Captain with the largest fire department in Texas and as Fire Chief of the second-largest department in the San Antonio area, Aj's background is rooted in trust, discipline, and community commitment.

Aj Castillo attended Columbia Southern University in Alabama and launched his real estate career in 2017 with Keller Williams. His drive, knowledge, and client-first approach quickly set him apart in a competitive market.

As the founder and CEO of Core Realty, Aj combines his deep expertise in building construction, both new and preowned homes, with an unwavering commitment to customer service. He leads Core Realty with the same values that guided his public service career—honesty, excellence, and a passion for helping others.