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. 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

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.