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Critical Loop

Mechanical Engineer

Long Beach (On-site) (United States)
Salary
$120K - $155K
Level
Mid
Work type
On-site · Long Beach

Not stated in the posting: visa.

Open. First seen 6 October 2026.

Apply on the company's site →

About the role

Critical Loop's standard text

About Critical Loop

Critical Loop is shaping the next generation of energy systems by building the integrated edge grid of the future. Specializing in advanced energy management and battery control systems, Critical Loop empowers businesses and communities to seamlessly unite distributed energy resources for faster, more reliable, and affordable grid access. With deep expertise in grid modernization and a passion for creating resilient, responsive energy solutions, Critical Loop drives innovation at the intersection of technology and energy.

The Role

We are hiring a Mechanical Engineer to own supplier-built power-distribution products and packaged power-conversion skids from design through production.

This is a hands-on, on-site role. You will work alongside electrical engineers, field ops, and fabricators. You will not hand work off. You stay with the problem until it is solved.

What You Will Do

  • Own product design, manufacture, and daily technical work with suppliers.
  • Design and release enclosures, skid structures, lifting features, equipment layouts, routing, sealing, grounding, and service access.
  • Keep CAD, drawings, BOMs, work instructions, inspection, and as-built records aligned.
  • Resolve supplier, fit-up, quality, and schedule issues.
  • Build, inspect, and troubleshoot prototypes and production hardware.
  • Turn R&D designs into repeatable production.

Must-Haves

  • 4+ years and a mechanical engineering degree or equivalent technical training.
  • Switchgear or similar electromechanical power-equipment experience.
  • Experience taking a product from incomplete requirements to working hardware.
  • Strong CAD, GD&T, drawing, BOM, and change-control skills.
  • Supplier and production issue ownership.
  • Hands-on measurement, assembly, inspection, and troubleshooting experience.
  • Able to work on-site full-time in Long Beach.

Nice-to-Haves

  • Switchboards, panelboards, transfer equipment, PCS skids, or packaged power systems.
  • UL 891, UL 1558, NEMA 250, NFPA 70, UL 9540, or NFPA 855.
  • Sheet metal, weldments, machining, sealing, lifting, or thermal design.
  • SolidWorks or Onshape, hand calculations, and tolerance stacks.

Work Authorization Critical Loop does not provide visa sponsorship for this role. Please do not apply for this role if at any time (now or in the future) you will need immigration support (i.e H-1B, TN, STEM OPT training plans etc.).

Critical Loop's standard text

At Critical Loop, we're committed to rewarding and supporting our team. Our benefits package includes equity ownership through stock options, giving you a stake in our success, along with comprehensive health coverage (medical, dental, and vision) through an HRA with a generous allowance. We also provide a retirement savings plan and unlimited paid time off so you can recharge and maintain work-life balance.

Critical Loop is an equal opportunity employer. We're committed to building a diverse team and creating an inclusive workplace where everyone can thrive. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status, or any other protected characteristic under applicable law.

What this role asks for

Particular to this role

SolidWorks

Rare in Critical Loop's other 8 open postings.

56% of this description is written for the role. The rest is Critical Loop's standard text, folded away below.

Read against Critical Loop's other open postings on this site.

The team: AGENCY ROLES - PRODUCT ENGINEERING HIRES STEADILY

This role is one of 4 open in AGENCY ROLES - PRODUCT ENGINEERING. 1 was posted in the last 30 days and the oldest in August: a team that hires all year rather than one being built.

WHAT THE TEAM WORKS WITH, ACROSS ITS POSTINGS

GD&T (2 of 4)

OTHER ROLES ON THIS TEAM

From the team and dates on Critical Loop's own job board.

Salary context

87 other open postings titled Mechanical Engineer state a salary: median USD 105,000 to USD 150,000 a year.

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