Senior Engineer, High Voltage Development

Are you ready to be part of a company that's not just talking about the future, but actively shaping it? Join The AES Corporation, the largest US-based global power company with a team of 8,300 employees across 12 countries.     AES has been  ranked #1 by BloombergNEF  in renewable energy sales to corporations in the US and Americas for five consecutive years, providing electricity for  millions of people worldwide.      We are proud to foster a strong workplace culture, earning prominent positions in Great Place to Work™ rankings across the markets where we operate. AES was also named one of the World’s Most Ethical Companies for the 13th consecutive year in 2026, highlighting our dedication to integrity, transparency, and responsible business practices.   Our spirit of innovation continues to earn industry recognition. AES is the only seven-time winner of the Edison Electric Institute’s Edison Awards in the twenty-first century, a distinction honoring global leadership in advancing the electric power industry.    If you're ready to be part of a company that's not just adapting to change, but driving it, AES is the place for you. We're not just building a more sustainable future ,  we're powering it. Apply now and energize your career with a true leader in global energy.  TITLE: Senior Engineer, High Voltage Development EMPLOYER: AES Clean Energy Services LLC LOCATION: 282 Century Pl, Ste 2000, Louisville, CO 80027 (Hybrid role; part time telecommuting authorized; 25% travel to site visits and factory inspections) DUTIES: Lead conceptual, preconstruction, and construction phase engineering for Solar, Wind, and BESS high voltage (35–500 kV) substations and generation tie lines. Develop conceptual designs and scope of work documents for permitting, estimating, and regional renewable projects in alignment with AES and utility standards. Manage external engineering consultants through development of 30% design packages for substations and transmission facilities. Perform in-house high voltage design work and support cost estimating, including BOM reviews and substation expansion assessments. Conduct technical due diligence to derisk project pipelines and Merger & Acquisition portfolios, serving as project engineer for all high-voltage functions. Review EPC substation bid packages for compliance with interconnection agreements, NERC standards, AES standards, and industry best practices. Provide design reviews and identify technically incorrect or inconsistent documentation, highlighting critical risks early in project development. Coordinate with interconnection providers (CAISO, HECO, Xcel, Tri State, PacifiCorp, etc.) to ensure compliant collector substations, gen tie designs, and switchyard requirements. Collaborate cross functionally with real estate, permitting, commercial, legal, estimating, PV/Wind/BESS engineering, preconstruction, and construction teams. Demonstrated experience across DC coupled, AC coupled solar plus BESS, wind, and multiphase project designs, and in maintaining relationships with specialist HV consultants and contractors.

Job requires a Bachelor’s degree in Electrical Engineering or a related field and 6 years of experience in high voltage design or a related field. This position also requires experience in the below: 5 years' experience in high Voltage (35–500 kV) Substation design experience for Renewable plants (Solar/Wind/BESS), conceptual through commissioning, using AutoCAD, Bluebeam 5 years' experience in high Voltage Generation tie line and medium voltage collector system design experience, conceptual through commissioning 4 years' experience in utilities to obtain technical requirements, negotiate LGIAs, and coordinate drawing reviews to ensure designs meet utility/ISO specifications 4 years' experience in analyzing EPC bids for cost competitiveness, value engineering opportunities, compliance with industry standards and Owner