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Engineer

Constellation
Marseilles, IL Full Time
POSTED ON 9/29/2026
AVAILABLE BEFORE 11/21/2026
Who We Are

As the largest private-sector power producer in the world and the nation's largest producer of clean and reliable energy, Constellation is focused on our purpose: lighting the way to a brilliant tomorrow for all. We have been the leader in clean energy production for more than a decade, and we are cultivating a workplace where our employees can grow, thrive, and contribute. Now integrated with Calpine, our portfolio includes 55 gigawatts of capacity from nuclear, natural gas, geothermal, hydro, wind and solar facilities, with the generating capacity to power the equivalent of 27 million homes.

Our culture and employee experience make it clear: We are powered by passion and purpose. Together, we're creating healthier communities and a cleaner planet, and our people are the driving force behind our success. At Constellation, you can build a fulfilling career with opportunities to learn, grow and make an impact. By doing our best work and meeting new challenges, we can accomplish great things. Join us in meeting the country's energy needs today and tomorrow.

Total Rewards

Constellation offers an extensive selection of benefits and rewards to help our employees thrive professionally and personally. We provide competitive compensation and a wide-range of benefits that support both employees and their families, helping them prepare for the future. In addition to highly competitive salaries, eligible employees are offered a bonus program, 401(k) with company match, employee stock purchase program; comprehensive medical, dental and vision benefits, including robust wellbeing programs; disability and life insurance benefits; paid time off for vacation, holidays, and sick days; and much more.

***This Engineering role can be filled at the Entry or Mid-level. Please see minimum qualifications list below for each level***

Expected Salary Range

  • Entry-Level - $87,000
  • Mid-Level - $92,700 - $114,000

Ranges are per year based on experience, along with a comprehensive benefits package that includes bonus and 401K.

Over the past decade, Constellation has invested more than $7.1 billion in capital across its nuclear fleet to support continued safe, reliable operations and long-term license extensions. We are planning multi-billion dollar investments through 2030 to include possible extended uprates and overall modernization of our nuclear facilities where appropriate.

We are seeking Engineers and other skilled technical experts to help Constellation, the largest private sector power producer in the world, continue to design, build and operate its nuclear fleet at world-class standards.

Primary Purpose Of Position

Responsible for performing engineering and technical tasks, under direct supervision, in support of nuclear plant operations.

Primary Duties And Accountabilities

  • Assure all engineering products prepared are in accordance with applicable safety analyses, industry codes, and all regulatory requirements.
  • Perform engineering and technical tasks as assigned by supervision
  • Support engineering work functions.
  • Perform other job assignments and duties as directed by management or pursuant to company policy, including but not limited to emergency response, departmental coverage, call outs, and support of outage activities in positions outside the department.

MINIMUM QUALIFICATIONS For Entry Level E01 Engineer

  • Bachelor’s degree in Engineering (Chemical, Civil/Structural, Electrical, Industrial, Mechanical or Nuclear)
  • Maintain minimum access requirements or unescorted access requirements, as applicable, and favorable medical examination and/or testing in accordance with position duties

MINIMUM QUALIFICATIONS For Mid-level E02 Engineer

  • Bachelor’s degree in engineering (chemical, civil/structural, electrical, industrial, mechanical or nuclear) with 2 years of nuclear or related engineering experience
  • Maintain minimum access requirements or unescorted access requirements, as applicable, and favorable medical examination and/or testing in accordance with position duties

Preferred Qualifications

  • Engineer in training certification

Salary : $92,700 - $114,000

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