Castillo Engineering, a leading national solar and energy storage engineering firm, announces the appointment of two executives to lead its next phase of growth: Aaron Carrillo as Vice President of Operations, and Devin Radovich as Vice President of Sales and Marketing. The two previously worked together at Renewable Energy Systems Americas (RES), a partnership that will accelerate Castillo’s scaling of its utility-scale engineering capacity.
After spending six years in the Arizona Army National Guard and obtaining his Engineering degree from ASU, Aaron Carrillo built over a decade of experience in scaling engineering organizations at Tesla and EVS. At Tesla, he scaled his own PV and BESS team from 25 to 70 designers, and as part of the leadership team, grew the 100-designer residential team to 300.
As a leader in EVS’ PV and BESS services, Carrillo helped grow the engineering team from 20 to 60 employees, increasing the firm’s utility-scale project throughput from 3-5 projects per year to 20-30 per year. Carrillo built that growth, while maintaining EVS’ standing as a Top 20 Renewables Engineering Firm, by developing standardized processes and quality systems designed to hold up as headcount and project volume increase.
“I’ve spent my career scaling engineering teams by building systems that let them grow without losing what made them good in the first place,” says Carrillo. “The Castillo team already has that instinct, with strong technical work, long-lasting client relationships, and a culture that’s centered around passion, process, and people. Together with Devin, I’m excited to help this team grow into one of the country’s top solar engineering firms.”
Carrillo’s arrival pairs operational scaling with Devin Radovich’s 30 years of experience in construction and energy, including nearly 15 years in renewables. Radovich brings a deep understanding of the utility-scale project lifecycle, having developed and delivered nearly 3 GW of solar, wind, battery storage, and transmission projects. As Vice President of Sales & Marketing, he is focused on strengthening relationships with EPCs, developers, and owners while supporting Castillo’s continued growth.
Carrillo and Radovich often collaborated at RES, with good results; on one utility-scale project, their championing of black steel piles in place of galvanized steel saved more than USD 7 million and cut lead times in half.
“Having worked together before, I’m thrilled that Aaron and I are bringing our shared approach and complementary skillsets to Castillo,” says Devin. “He builds the operational systems that let an engineering team grow without losing quality, while I tell that story to the market. I’m looking forward to building lasting partnerships through trust, communication, and a shared commitment to success.”
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