Senior Project Engineer - Solar & BESS

Why you should join Heirloom

• We are solving the challenge of our generation. Climate change is an existential threat, and we need as many of the world’s motivated minds as possible to help. There is no greater challenge or opportunity than fighting climate change.

• We are a world-class team. We are engineers, scientists, and concerned humans from a variety of backgrounds and experiences who are pooling our knowledge and skills to collectively build a more equitable, prosperous future for all.

• We remain united, resilient, and optimistic. We recognize the magnitude of the challenge ahead of us, yet believe that we can contribute to mitigating the worst effects of climate change. It won’t be easy, but we won’t quit.

Build the solar and storage backbone of a first-of-its-kind clean power plant. Energy Park P1 pairs a 1.1 GWh battery and on-site solar with zero-emission, clean energy to power a hyperscale data center, with no grid connection. You'll own the Solar + BESS package end to end, from picking suppliers to energizing the system, on a small team where your calls shape the project and the template for the projects after it. The challenge: a fast schedule, a behind-the-meter microgrid with multiple sources, and suppliers who need to be held to performance.

Key Responsibilities: Engineering & Integration

• Translate standard electrical and controls requirements into solar, BESS and O&M scopes of work, specifications and datasheets

• Lead design reviews with integrators, EPCs and the owner's engineer (layouts, MV collection, protection, SCADA/EMS integration, fire safety)

• Own technical integration of solar and BESS with on-site generation and data center loads, including microgrid operating modes

• Support HAZOP/HAZID, FMEA, NFPA 855 hazard mitigation analysis, UL 9540A review and AHJ/fire marshal engagement

Procurement & Vendor Management

• Collaborate with Supply Chain on: supplier outreach, RFIs and RFPs; manage bidder Q&A and clarifications

• Prepare technical bid evaluations and leveled bid tabs; recommend awards

• Collaborate with Supply Chain on: Negotiate technical terms, warranties, performance guarantees, delivery and transportation schedules

• Collect domestic content and supply chain documentation needed for tax credit eligibility

Construction, Commissioning & Turnover

• Oversee contractor and vendor engineering progress, inspections, FAT/SAT, delivery, installation and energization

• Lead commissioning, capacity and performance testing, and punch-list closeout

• Deliver turnover packages and operations readiness with the O&M provider

Project Controls

• Maintain the solar and BESS schedule; track long-lead equipment and flag risks early

• Validate vendor pricing against benchmarks and the financial model; manage change orders

• Develop engineering procedures, design guides and lessons learned for future deployments

You don’t have to have every listed requirement and skill to be a great fit. If you are passionate about this opportunity and think you have the skills to succeed, please apply!

Our Commitment to Diversity, Equity, and Inclusion We encourage you to apply if you identify as Black, Native Hawaiian or Pacific Islander, American Indian or Alaskan Native, Hispanic or Latino, LGBTQ+ – or with any other underrepresented group – even if you don’t tick all the boxes in the description below.

Perks and Benefits for Eligible Employees

• Excellent health, dental and vision insurance covered up to 100% by Heirloom. FSA option

• 16 weeks paid parental leave for all Heirloom employees

• Generous stock options

• Flexible PTO for exempt (salaried) employees & 120 hours for full time non-exempt (hourly) employees

• 401(k)

• Monthly health and wellness reimbursement

• Annual education and conference budget

Our Principles

• Radical Honesty. We strive to foster an inclusive environment premised on transparency and respect. We push for excellence, yet always remain thoughtful when challenging each other.

• Persistent Optimism. We show up to work with optimism and don’t shy away from a challenge. We recognize that the ambitious nature of our mission requires hopefulness, dedication, and persistence.

• Maximize Learning. Compounding knowledge is our key to victory - we continuously hone our crafts, seek the fastest paths to improve, and are quick to absorb and apply new insights.