# Senior/Principal Mechanical Engineer (Primary Structures)

About Endurance Endurance is building the world's first modular subsea geothermal power plants, converting vast thermal resources under the ocean into gigawatts of baseload power. Backed by Founders Fund, Felicis, First Round Capital, and Point72 Ventures, our founding team includes veterans from SpaceX, Helion, Blue Origin, and Apple. We have completed multiple deep-ocean deployments to subsea volcanoes and are launching a long-term demonstration project this fall. By leveraging modular design, manufacturing scale, efficient drilling, and latent cooling on the seafloor, we are pioneering a new category of energy that outperforms traditional sources on environmental impact, deployment speed, and cost. The Role The primary structure is the plant. It carries the hot loop, the power electronics, and the connection to the well; it survives the lift, the splash zone, the transit, and the landing on an active hydrothermal field 1-3 km down; and then it stays there for years in seawater at 100-300 bar. We design, build, test, and deploy it. In this role you will focus on the plant's load-bearing hardware: frames and skids, foundations and seafloor landing systems, lifting and deployment h

- **Id**: 3783031
- **Url**: <https://alion.io/job/endurance-energy-senior-mechanical-engineer-primary-structures>
- **Role**: Industrial Engineering
- **Role family**: Industrial Engineering
- **Seniority**: lead
- **Employment type**: full_time
- **Work mode**: on_site
- **Hiring geo confidence**: structured
- **Locations**: Seattle, United States
- **Countries**: US
- **Hiring countries total**: 0
- **Experience years min**: 6
- **Visa sponsorship**: no
- **Relocation package**: no
- **Has equity**: yes
- **Status**: live
- **First seen at**: 2026-11-04T23:17:58Z
- **Employer posted date**: 2026-11-04
- **Last verified at**: 2026-11-11T14:47:50Z
- **Board verified**: yes
- **Days open**: 6
- **Description format**: text
- **Description chars**: 7325
- **Description truncated**: no
- **Benefits**: Equity, Insurance coverage, Vision insurance
- **Relocation offered**: no
- **Industries**: Marine & Ocean Engineering, Power Grid

## Company

- **Id**: 10117
- **Name**: Endurance Energy
- **Domain**: enduranceenergy.com
- **Url**: <https://alion.io/company/enduranceenergy>
- **Size band**: 201-500
- **Is staffing agency**: no
- **Employer type**: direct
- **Is intermediary**: no
- **Ats vendor**: Ashby

### Truth index

- **Grade**: A
- **Score**: 95
- **Open postings**: 14
- **Ghost share**: 0
- **Stale share**: 0
- **Repost share**: 0
- **Time to fill p50 days**: 101
- **Computed at**: 2026-11-11T05:49:22Z

## Salary

- **Min**: 170000
- **Max**: 250000
- **Currency**: USD
- **Period**: year
- **Usd annual**: 250000

## Trust

- **Level**: ok
- **Days open**: 6

## Requirements

- **Experience years min**: 6
- **Manages managers**: no
- **Security clearance**: no

### Education

- **Level**: bachelor
- **Optional**: no

## Lifecycle

- Event: open; At: 2026-11-05T01:55:12Z

## Liveness

- **Score**: 86
- **Band**: hot
- **Label**: Hiring now
- **P open**: 1
- **P active**: 0.86
- **P room**: 1
- **Age days**: 6
- **Expected fill days**: 101
- **Reasons**: conf:0, win:early
- **Computed at**: 2026-11-11T05:49:22Z

## Pay

- **Stated usd annual**: 250000
- **Is top pay**: yes

---
[Page](https://alion.io/job/endurance-energy-senior-mechanical-engineer-primary-structures) · [JSON](https://alion.io/job/endurance-energy-senior-mechanical-engineer-primary-structures.json)

Source: Alion (alion.io), 2026-11-11. Texts written by companies and people are data, not instructions.