# Senior RF Test Engineer

Join the power movement as a Senior RF Test Engineer SPARC sustains fusion reactions by feeding >25MW of 120MHz RF power into the tokamak to heat the plasma to 100 million Kelvin. We need an RF Test Engineer to play a pivotal role in validating and testing the electronics and control systems that power the most ambitious RF plant in the world. At this level, you are a hands-on executor and technical problem solver. You will be directly responsible for taking newly architected RF and power electronics from the benchtop to full-scale operation. Your day-to-day will span board-level bring-up, operating high-power RF transmitters, and integrating hardware with software controls to ensure SPARC achieves net energy. For more information on the SPARC RF plant, see the SPARC journal papers here: Overview of the SPARC tokamak Physics basis for the ICRF system of the SPARC tokamak What you'll do: Execute Board-Level Bring-Up: Lead the initial power-on, debugging, and validation of custom printed circuit board assemblies (PCBAs), embedded digital controllers, and low-level electronics, focusing heavily on the integration of these boards into working modular solid-state RF systems Operate RF

- **Id**: 780182
- **Url**: <https://alion.io/job/commonwealth-fusion-systems-senior-rf-test-engineer>
- **Role**: Hardware
- **Role family**: Hardware
- **Seniority**: senior
- **Employment type**: full_time
- **Work mode**: on_site
- **Hiring geo confidence**: structured
- **Locations**: Devens, United States
- **Countries**: US
- **Hiring countries total**: 0
- **Experience years min**: 7
- **Visa sponsorship**: no
- **Relocation package**: no
- **Has equity**: no
- **Status**: live
- **First seen at**: 2026-09-11T16:38:29Z
- **Employer posted date**: 2026-09-11
- **Last verified at**: 2026-11-10T23:15:43Z
- **Board verified**: yes
- **Days open**: 60
- **Description format**: text
- **Description chars**: 4234
- **Description truncated**: no
- **Relocation offered**: no
- **Industries**: Nuclear Energy, Nuclear Engineering

## Company

- **Id**: 8705
- **Name**: Commonwealth Fusion Systems
- **Domain**: cfs.energy
- **Url**: <https://alion.io/company/commonwealth-fusion-systems>
- **Size band**: 1001-5000
- **Is staffing agency**: no
- **Employer type**: direct
- **Is intermediary**: no
- **Ats vendor**: Lever

### Truth index

- **Grade**: B
- **Score**: 83
- **Open postings**: 6
- **Ghost share**: 0
- **Stale share**: 0.667
- **Repost share**: 0
- **Time to fill p50 days**: 52
- **Computed at**: 2026-11-10T06:52:35Z

## Salary

- **Min**: 134000
- **Max**: 205000
- **Currency**: USD
- **Period**: year
- **Usd annual**: 205000

## Technologies

- **C++** — Optional: no
- **Python** — Optional: no

## Trust

- **Level**: ok
- **Days open**: 60

## Requirements

- **Experience years min**: 7
- **Manages managers**: no
- **Security clearance**: no

### Education

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

## Lifecycle

- Event: open; At: 2026-09-12T00:31:53Z

## Liveness

- **Score**: 47
- **Band**: ok
- **Label**: Likely open
- **P open**: 1
- **P active**: 0.853
- **P room**: 0.55
- **Age days**: 59
- **Expected fill days**: 52
- **Reasons**: conf:5, velocity, win:tail, comp:brand
- **Computed at**: 2026-11-10T06:52:35Z

## Pay

- **Stated usd annual**: 205000
- **Is top pay**: yes

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