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Averro

Mechanical Engineer (Nuclear)

Location

Oak Brook, IL

Wage

$90,000 – $120,000/yr

Employment Type

Full-time

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Posted on October 26, 2026

Job Description

Overview

We are seeking a Mechanical Engineer for an advanced nuclear reactor engineering team at a well-funded and rapidly growing startup. This role is ideal for someone with experience in mechanical system design and nuclear codes compliance looking to further their career in nuclear energy.

Responsibilities

  • Design and optimize mechanical systems including reactor-internal hardware, pressure vessels, and balance-of-plant equipment with regulatory submissions and technical specifications.
  • Provide engineering input on materials selection, fabrication processes, welding techniques, and quality control per ASME and nuclear standards.
  • Ensure compliance with ASME B&PV Code (Sections III/VIII), ASME B31.1, and NRC regulatory requirements.
  • Collaborate with multidisciplinary teams across reactor engineering, thermal hydraulics, safety, and operations on integrated design solutions.
  • Support licensing and regulatory engagements by providing technical justification and responding to regulatory inquiries.

Requirements

  • Bachelor's degree in Mechanical Engineering.
  • 1–5+ years of mechanical system design experience with ASME code-based design and analysis expertise.
  • Proficiency with engineering CAD (NX, SolidWorks) and mechanical analysis tools for stress, fatigue, thermal, and vibration modeling.

Benefits

  • Health Insurance
  • Dental
  • Vision
  • PTO
  • 401k

Benefits

Health Insurance
Dental
Vision
PTO
401k
Apply for This Position

How this job compares in Oak Brook, IL

Pay in context

At roughly $50/hr, this posting sits about 58% above the $32/hr median for welding jobs across Illinois — toward the top of a $27–$43/hr middle band drawn from 251 postings with published pay. Put another way, it pays more than about 81% of the comparable postings we have wage data for. Pay that far above local median usually comes attached to something: a harder cert requirement, travel, night shift, or overtime that isn't really optional. Worth establishing which before you accept.

The local market in Oak Brook, IL

Oak Brook, IL is a small market in our index: 1 other active welding opening alongside this one, from 1 employer. Across Illinois as a whole we're tracking 342 other active welding openings from 206 employers. With this few local postings, most welders here end up either commuting or looking at travel work. Browse welding jobs across Illinois.

The most active employers in Illinois at the moment, by number of open welding reqs, are Gerber Collision & Glass (16), S&C Electric Company (10), and Crash Champions (9). Volume like that usually means either a genuine expansion or a staffing agency working several client sites — worth knowing which before you apply.

Within Illinois, the best-paying metros we track by median hourly rate are Chicago at $38/hr, Downers Grove at $36/hr, and Elk Grove Village at $34/hr. If you can relocate or commute, that spread is worth factoring in.

Certifications this posting mentions

  • ASME Section IX — the ASME Boiler and Pressure Vessel Code qualification. It covers welding on pressure-retaining equipment — boilers, vessels, and process piping — where a failed weld is a safety incident rather than a rework ticket.

Read straight from this posting's text. Confirm the exact qualification the employer wants before you test — requirements vary by shop even under the same code.

Similar openings near Oak Brook, IL

Pay figures are medians computed from live postings in the Welding Pros index, not from survey data, and they move as employers post. Mechanical Engineer (Nuclear) figures were last recalculated when this page was built.