[Skip to main content](#main-content) [OpenNash Jobs](https://jobs.opennash.com/) [Hiring report](/reports/hiring/) · [All Ameren jobs](https://jobs.opennash.com/companies/ameren/) · [Search jobs](/search/) Ameren · Steedman, MO # Senior Reactor Operator Steedman, MO Full-time Senior individual contributor $105,100.00 - $162,900.00 Operations Listed on Ameren’s official careers site. Listed as of October 17, 2026. Check that it is still open and apply there. [Apply on Ameren’s careers site →](https://ameren.wd1.myworkdayjobs.com/External/job/Steedman-MO/Senior-Reactor-Operator_033360) [OpenNash Jobs](https://jobs.opennash.com/) / [Ameren](https://jobs.opennash.com/companies/ameren/) / Senior Reactor Operator ## Job description About the Callaway Energy Center The Callaway Energy Center is a nuclear facility located in mid-Missouri. The Energy Center has more than 800 employees and contractors working at the facility, and it has established a strong record of safe operation throughout its 30-year operating history. The Energy Center is a highly efficient, low-cost, sustainable source of electricity for Ameren Missouri’s 1.2 million customers. Our benefits include: Medical coverage on date of hire 100% employer paid cash balance pension plan 401(k) with company match fully vested on date of hire Minimum of 15 days paid vacation and 12 paid holidays Paid parental leave and family caregiver leave Visit our Benefits & Perks Page for more information on benefits provided to regular full-time employees. ​ About The Position ​ ​ ​ The Operating Supervisor supervises the operation of Callaway Energy Center to ensure the safe, legal and efficient operation of the nuclear power generating unit. ​ ​ Key responsibilities include: ​ ​ Manage and direct a team of approximately 10 employees. ​ Direct Reactor Operators in the control room performing procedures to maneuver and operate the plant. ​ Supervise Operations Technicians in the field performing local system operations and testing. ​ Administer the Workman’s Protection Assurance Program. ​ Train and develop crew members. ​ Interface with all nuclear departments, internal company personnel, and external personnel as required to support work on plant equipment and systems. ​ Maintain and promote positive behaviors in the areas of commitment to excellence, teamwork, respect, integrity, accountability, and stewardship. ​ Support performance improvement initiatives such as assessments, benchmarks, and the corrective action program. ​ Actively participate in training to develop and broaden the skills of the Callaway Energy Center workforce. ​ May be assigned to rotational positions in work control or as a training instructor. ​ Assume Emergency Response Organization ( ERO) duties in accordance with Callaway Energy Center Radiological Emergency Response Plan (RERP) including responding to assigned ERO facilities within the required RERP response time. ​ Qualifications ​ ​ H igh School Diploma or equivalent is required. ### Must meet one of the following requirements - Currently a Licensed Reactor Operator or Licensed Senior Reactor Operator with one or more years of experience in the position; - Previously a Licensed Reactor Operator or Licensed Senior Reactor Operator at a commercial reactor with at least 1.5 years of experience in the position; - Qualified Reactor Operator (RO), Engineering Watch Supervisor (EWS), Propulsion Plant Watch Supervisor (PPWS), or Engineering Officer of the Watch (EOOW) on a military reactor for a minimum of 2 years; - Bachelor ’s degree with a minimum of 1.5 years of nuclear power plant experience; - Previously Certified Senior Reactor Operator at another site or currently Certified Senior Reactor Operator at Callaway with at least 2 years of experience in the position. ​ I n addition to the above qualifications, the successful candidate will demonstrate: ​ ​ ​ Good leadership, decision-making, communication and human relations skills are required. After preliminary review, selected applicants must take the First Line Supervisor Test and obtain a recommended status in order to be eligible for additional selection procedures (e.g., interview) designated for this position. Qualified candidates are required to establish and maintain their permanent residence within sixty highway miles of the Callaway Energy Center. Security screening required for Callaway Energy Center access. ​ ​ Working Conditions ​ ​ ​ The Operating Supervisor works a rotating shift in an office/plant environment. Additional hours and/or callouts may be required during refueling outages and emergent plant activities as the needs arise. ​ ​ Additional Information Ameren’s selection process includes a series of interviews and may include a leadership assessment process. Specific details will be provided to qualified candidates. ### Compensation Range $105,100.00 - $162,900.00 At Ameren, base salary is one component of a competitive compensation package for employees. Our pay ranges are broad to allow for movement within our organization and to accommodate different skill sets and levels of expertise. We take into consideration a variety of factors including, but not limited to, skills, abilities, experience, education, credentials, and internal equity when determining the base salary offered. Roles are eligible for additional rewards including annual incentive payments based on individual and company performance. If end date is listed, the posting will come down at 12:00 am on that date: All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, ethnicity, age, disability, genetic information, military service or status, pregnancy, marital status, sexual orientation, gender identity or expression, or any other class, trait, or status protected by law. ## At a glance - Posted by the employer: Not stated - First seen by OpenNash: Jul 10, 2026 - Last checked: Oct 17, 2026 - Listed for: 99 days - Location: Steedman, MO - Employment type: Full-time - Pay: $105,100.00 - $162,900.00[Apply on Ameren’s careers site →](https://ameren.wd1.myworkdayjobs.com/External/job/Steedman-MO/Senior-Reactor-Operator_033360) ## More jobs at Ameren ### [Electrical Power Engineer](https://jobs.opennash.com/companies/ameren/jobs/9a1fea7be61fbd6ccc27/) Steedman, MO ### [Probabilistic Risk Assessment Engineer](https://jobs.opennash.com/companies/ameren/jobs/c9b6ba58b3fc2bd8bb61/) Steedman, MO ### [Cyber Security & Nuclear Systems Program Engineer](https://jobs.opennash.com/companies/ameren/jobs/2bbe8b359c8b15858435/) Steedman, MO ### [I&C Nuclear Instructor](https://jobs.opennash.com/companies/ameren/jobs/cfd68c1894cb34393235/) Steedman, MO ### [Instrumentation & Control Maintenance Supervisor](https://jobs.opennash.com/companies/ameren/jobs/b617648ea68049dc6d17/) Steedman, MO ## Similar jobs at other companies ### [Reactor Operator I](https://jobs.opennash.com/companies/sherwin-williams/jobs/2be58d60ca7360272522/) Sherwin-Williams · Los Angeles, CA, United States ### [Reactor Operator - License Class](https://jobs.opennash.com/companies/nextera-energy/jobs/cf9a3916f753d87c09d2/) NextEra Energy · Palo, IA, US ### [Nuclear Operations Unit Supervisor (Senior Reactor Operator - License Class)](https://jobs.opennash.com/companies/nextera-energy/jobs/7d135d77afd850a6765a/) NextEra Energy · Location: Palo, IA, US ### [Senior Reactor Operator](https://jobs.opennash.com/companies/constellation-energy/jobs/98f2d718e9fd31ae0f08/) Constellation Energy · Braceville, Illinois OpenNash lists jobs from employers’ own careers sites and does not handle applications. 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