Senior Mechanical Engineer 1 - Nuclear

Sargent Lundy; Warrenville (IL); Hybrid; USD 84,762 - 129,498; Full time

Benefits offered by this job

Comprehensive healthcare plans

401(k)

Paid time off

Flexible work arrangements

Job summary

Sargent Lundy, located in Warrenville, Illinois, is seeking a skilled engineer in nuclear power systems design to join our team. The role offers a hybrid work arrangement, allowing a balance of remote work and in-office collaboration.

The ideal candidate should possess a BS or MS in Mechanical or Chemical Engineering and have at least 5 years of experience in the power industry. Responsibilities include leading project teams and preparing engineering designs and modifications for nuclear systems.

Qualifications

• Minimum of 5 years of experience in the power industry.
• Working knowledge of codes and standards for nuclear plants.
• PE license beneficial but not required.

Responsibilities

• Design nuclear power plant systems and prepare modification packages.
• Lead engineering project teams and interface with clients.
• Develop engineering cost estimates for client-requested work.

Skills

Nuclear power systems design

Mechanical or Chemical Engineering

Project leadership

Education

BS or MS in Mechanical or Chemical Engineering

Tools

Python

MATLAB

Job description

Description

This role offers a hybrid work arrangement. You'll spend three days a week in the office, giving you the flexibility to work remotely for two days.

You will be involved in nuclear power plant systems design, including preparation or review of:

• Modification packages for operating nuclear power plants
• Functional mechanical drawings and/or drawings for nuclear power plant systems
• Engineering analyses and evaluations to support modifications and operation of plant systems
• Technical specifications and procurement documents for plant equipment
• Vendor bid evaluations for plant equipment
• Studies and options evaluations for modifications to operating nuclear power plants

In addition, you will have the opportunity to:

• Develop engineering cost estimates for small to mid-sized client-requested work scopes
• Visit client office and/or plant site locations to interface with the clientand make presentations related to engineering tasks and status
• Lead engineering project teams

Qualifications

We do not sponsor employees for work authorization in the U.S. for this position.

• BS or MS in Mechanical or Chemical Engineering from an ABET accredited program with academic coursework in thermodynamics, fluid mechanics, and heat transfers
• A minimum of 5 years of experience in the power industry
• Working knowledge of codes, standards, and regulations that apply to mechanical engineering design of nuclear power plants
• PE license is beneficial, but not required

AI & Automation at Sargent & Lundy

In this role, we expect people to be willing or able to lead others who use modern tools:

• You are expected to lead others in taking engineering problems from issue to solution by setting expectations for using data and modern tools such as automation and AI to improve workflows, reduce rework, and deliver cost-effective designs.
• Leaders in these roles often direct automation and process-improvement work, for example, how teams automate calculations, summarize technical documents, or generate design documentation and guiding when and how AI or agentic AI tools are used while ensuring results are checked.
• Overseeing engineers who program or script (e.g., Python, MATLAB, advanced Excel) to automate engineering tasks, with review of automated outputs, is valued but not required.
• We also value additional learning, such as a minor, certificate, or other experience in Computer Science, Artificial Intelligence, Software Engineering, or related fields that enables effective oversight of automation and agentic AI-enabled engineering workflows.

Award-Winning Benefits

At Sargent & Lundy, we care about the health and well-being of our employees. Our commitment extends beyond the workplace, offering comprehensive healthcare plans and generous paid time off to support our team members in every aspect of their lives. We understand the importance of work-life balance, which is why we are proud to provide competitive, award-winning benefits. Our dedication to employee satisfaction has earned us the prestigious Top Workplaces Culture Excellence Award for compensation and benefits in 2022, 2023, and 2024.

Health & Wellness

• Health Plans: Medical, Dental, Vision
• Life & Accident Insurance
• Disability Coverage
• Employee Assistance Program (EAP)
• Back-Up Daycare
• FSA & HSA

Financial Benefits

• 401(k)
• Pre-Tax Commuter Account
• Merit Scholarship Program
• Employee Discount Program
• Corporate Charitable Giving Program
• Tuition Assistance
• First Professional Licensure Bonus
• Employee Referral Bonus

Work-Life Balance

• Paid Annual Personal/Sick Time (PST)
• Paid Vacation
• Paid Holidays
• Paid Parental Leave
• Paid Bereavement Leave
• Flexible Work Arrangements

Compensation Range

$84,762 - $129,498

Transparency Statement

Sargent & Lundy discloses compensation ranges that comply with all local and state regulations. The total compensation package for eligible positions will include a base salary or an hourly rate and a comprehensive benefits package, reflecting our commitment to rewarding performance and supporting the overall well-being of our employees. Individuals may also be eligible to participate in our yearly discretionary bonus.

About This Business Unit

Join Sargent & Lundy's Nuclear Power Group and be part of a team driving the future of clean, carbon-free energy. Since 1954, we’ve been a trusted leader in nuclear engineering, design, and licensing, with expertise spanning small modular reactors (SMRs), advanced reactor technology (ART), and first-of-a-kind commercial reactor restart projects. Our work supports life extensions and digital modernization of existing nuclear plants, coal-to-nuclear conversion initiatives with the Department of State, and international nuclear new-build projects. With a commitment to safety, innovation, and sustainability, we provide cutting-edge solutions that power communities worldwide while reducing emissions. Shape the future of global energy with us!

Equal Opportunity

Sargent & Lundy is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, national origin, disability status, protected veteran status, or any protected status as defined by applicable law.