Empowering utility-scale projects with innovative, customized engineering solutions from design to construction close-out.

Castillo Engineering is a leading minority-owned utility-scale design and engineering firm specializing in full-service solar, energy storage, and high-voltage solutions. We provide comprehensive support from initial feasibility studies through construction close-out. As your Engineer of Record, we ensure projects are completed on time and within budget, consistently delivering high-quality, innovative solutions to developers, EPC contractors, utilities, and data centers nationwide. With over 25 years of experience and more than 10GW of successful projects, we navigate national, state, and local codes with precision. Power designed, power delivered—every time.