Senior Engineer, High Voltage Development

The AES Corporation; Louisville (CO); Hybrid; USD 156,000 - 160,000; Full time

Job summary

The AES Corporation in Colorado is seeking a Senior Engineer, High Voltage Development to drive high‑voltage substation design from concept through commissioning for renewable projects. You will lead internal and external teams, ensure compliance with interconnection agreements and industry standards, and collaborate across permitting, estimating, and construction functions.

Qualified candidates bring 5+ years HV substation design experience, strong CAD/ETAP/OpenDSS skills, and a track record of

Qualifications

• 5 years' experience in high voltage substation design for renewable plants (Solar/Wind/BESS).
• 5 years' experience in high voltage generation tie line and MV collector system design.
• 4 years' experience coordinating utilities to meet specifications (LGIAs, ISO).
• 4 years' experience analyzing EPC bids for cost & value engineering.
• 3 years' experience in HV Greenfield/Brownfield due diligence & portfolio risk.
• 4 years' experience managing Engineer of Record to develop HV design packages (10%, 30%, 60%).
• 4 years' experience in developing HV equipment specs and reviews.
• 5 years' experience with AutoCAD, Bluebeam, ETAP, OpenDSS, Google Earth, and Microsoft Suite.

Responsibilities

• Lead HV substation design for Solar, Wind, and BESS projects (35–500 kV) through commissioning.
• Develop concepts for permitting, estimating, and regional projects aligned with AES standards.
• Manage external consultants for 30% design packages of substations and transmission facilities.
• Review EPC bid packages for compliance with interconnection agreements, NERC, AES standards.
• Coordinate with interconnection providers (CAISO, HECO, Xcel, Tri State, PacifiCorp).
• Collaborate withReal estate, permitting, commercial, legal, estimating, and PV/Wind/BESS teams.
• Provide design reviews and flag critical risks early in project development.

Skills

High Voltage engineering

Analytical thinking

Vendor coordination

Negotiation

Regulatory compliance

Tools

AutoCAD

Bluebeam

ETAP

OpenDSS

Google Earth

Microsoft Suite

Job description

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.

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.

Requirements

• 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 standards
• 3 years' experience in high Voltage Greenfield, Brownfield, and Merger & Acquisition technical due diligence & portfolio risk assessment
• 4 years' experience in managing Engineer of Record to develop 10%, 30%, and up to 60% High Voltage design package by providing oversight and ensuring compliance with industry standards such as IEEE, NESC, NFPA, and ISO and Utility‑specific requirements
• 4 years' experience in developing, designing and de-risking deliverables and support High Voltage Estimators with Class 4 and Class 5 estimates, including General Arrangements, Single‑Line Diagrams, Bill of Materials
• 4 years' experience in developing High Voltage circuit breaker and transformer specifications for key Owner Furnished equipment, plus review all design drawings and equipment selection, in person supervise pre‑tanking and factory acceptance testing
• 5 years' experience in AutoCAD, Bluebeam, ETAP, OpenDSS, Google Earth, and Microsoft Suite.

Salary

The expected salary for this position, at commencement of employment, is between $156,354 to $159,500/year; however, base pay offered may vary depending on multiple individualized factors, including market location, job‑related knowledge, skills, and experience. The total compensation package for this position also includes annual bonus. The benefits offered for this position are: medical, dental, and vision coverage, life insurance, 401(k) eligibility, and paid time off (including vacation, sick leave time, and parental leave). Details of participation in these benefit plans will be provided if a candidate receives an offer of employment. If hired, employee will be in an “at‑will position” and the Company reserves the right to modify base salary (as well as any other discretionary payment or compensation program) at any time, including for reasons related to individual performance, Company or individual department/team performance, and market factors.)

Equal Employment Opportunity & E‑Verify Notice

AES is an Equal Opportunity Employer who is committed to building strength and delivering long‑term sustainability through diversity and inclusion. Respecting all backgrounds, differences and perspectives enables us to improve the lives of our people, customers, suppliers, contractors, and the communities in which we live and work. All qualified applicants will receive consideration for employment without regard to sex, sexual orientation, gender, gender identity and/or expression, race, national origin, ethnicity, age, religion, marital status, physical or mental disability, pregnancy, childbirth or related medical condition, military or veteran status, or any other characteristic protected under applicable law. E‑Verify Notice: AES will provide the Social Security Administration (SSA) and if necessary, the Department of Homeland Security (DHS) with information from each new employee's I-9 to confirm work authorization.