Mechanical Engineer
$111K - $215K/yr
... gas, hydro and renewable. The position will include project support duties that may require long ... Lead mechanical engineering technical support for all phases of simple cycle, combined cycle and ...
$111K - $215K/yr
... gas, hydro and renewable. The position will include project support duties that may require long ... Lead mechanical engineering technical support for all phases of simple cycle, combined cycle and ...
$111K - $215K/yr
... gas, hydro and renewable. The position will include project support duties that may require long ... Lead mechanical engineering technical support for all phases of simple cycle, combined cycle and ...
Saint Louis, MO · On-site
$111K - $215K/yr
... gas, hydro and renewable. The position will include project support duties that may require long ... Lead mechanical engineering technical support for all phases of simple cycle, combined cycle and ...
Saint Louis, MO · On-site
$111K - $215K/yr
... gas, hydro and renewable. The position will include project support duties that may require long ... Lead mechanical engineering technical support for all phases of simple cycle, combined cycle and ...
Saint Louis, MO · On-site
$101K - $134K/yr
... hydro, hydrogen) and energy storage (lithium-ion batteries, flow batteries). The Senior Mechanical ... Develop mechanical engineering design documents including design notes, calculations, reports, flow ...
Saint Louis, MO · On-site
$101K - $134K/yr
... hydro, hydrogen) and energy storage (lithium-ion batteries, flow batteries). The Senior Mechanical ... Develop mechanical engineering design documents including design notes, calculations, reports, flow ...
Berkeley, MO · On-site
$80 - $100/hr
Prior aerospace & defense experience in one or more of the following engineering domains: Avionics, Radar, Sensors, Hydro Mechanical, Mechanisms, Structural, or Reliability & Maintainability.
Berkeley, MO · On-site
$80 - $100/hr
Prior aerospace & defense experience in one or more of the following engineering domains: Avionics, Radar, Sensors, Hydro Mechanical, Mechanisms, Structural, or Reliability & Maintainability.
Prior aerospace & defense experience in one or more of the following engineering domains - Avionics, Radar, Sensors, Hydro Mechanical, Mechanisms, Structural, or Reliability & Maintainability
Prior aerospace & defense experience in one or more of the following engineering domains - Avionics, Radar, Sensors, Hydro Mechanical, Mechanisms, Structural, or Reliability & Maintainability
Berkeley, MO · On-site
$98K - $134K/yr
Prior aerospace & defense experience in one or more of the following engineering domains - Avionics, Radar, Sensors, Hydro Mechanical, Mechanisms, Structural, or Reliability & Maintainability
Berkeley, MO · On-site
$98K - $134K/yr
Prior aerospace & defense experience in one or more of the following engineering domains - Avionics, Radar, Sensors, Hydro Mechanical, Mechanisms, Structural, or Reliability & Maintainability
Berkeley, MO · On-site
$98K - $134K/yr
Prior aerospace & defense experience in one or more of the following engineering domains - Avionics, Radar, Sensors, Hydro Mechanical, Mechanisms, Structural, or Reliability & Maintainability
Berkeley, MO · On-site
$98K - $134K/yr
Prior aerospace & defense experience in one or more of the following engineering domains - Avionics, Radar, Sensors, Hydro Mechanical, Mechanisms, Structural, or Reliability & Maintainability
Berkeley, MO · On-site
$150 - $200/hr
Prior aerospace & defense experience in one or more of the following engineering domains - Avionics, Radar, Sensors, Hydro Mechanical, Mechanisms, Structural, or Reliability & Maintainability
Berkeley, MO · On-site
$150 - $200/hr
Prior aerospace & defense experience in one or more of the following engineering domains - Avionics, Radar, Sensors, Hydro Mechanical, Mechanisms, Structural, or Reliability & Maintainability
Prior aerospace & defense experience in one or more of the following engineering domains - Avionics, Radar, Sensors, Hydro Mechanical, Mechanisms, Structural, or Reliability & Maintainability
Prior aerospace & defense experience in one or more of the following engineering domains - Avionics, Radar, Sensors, Hydro Mechanical, Mechanisms, Structural, or Reliability & Maintainability
From field engineering to project management to quality and startup, you'll work with cuttingedge ... hydro facilities, tunnel construction, waterway, and marine construction. Please note: This is a ...
From field engineering to project management to quality and startup, you'll work with cuttingedge ... hydro facilities, tunnel construction, waterway, and marine construction. Please note: This is a ...
O Fallon, IL · On-site
$15 - $25/hr
Capable of: * * understanding engineering drawings and associated bills of material * bending and ... Ability to physically control industrial hydro-blasting and vacuum equipment * Ability to carry ...
Quick apply
O Fallon, IL · On-site
$15 - $25/hr
Capable of: * * understanding engineering drawings and associated bills of material * bending and ... Ability to physically control industrial hydro-blasting and vacuum equipment * Ability to carry ...
Creve Coeur, MO · On-site
$200 - $250/hr
... hydro facilities, tunnel construction, waterway, and marine construction. Responsibilities ... Maintains familiarity with estimating and cost engineering developments and activities outside the ...
Creve Coeur, MO · On-site
$200 - $250/hr
... hydro facilities, tunnel construction, waterway, and marine construction. Responsibilities ... Maintains familiarity with estimating and cost engineering developments and activities outside the ...
Creve Coeur, MO · Hybrid
$107K - $190K/yr
From field engineering to project management to quality and startup, you'll work with cuttingedge ... dams and hydro facilities, tunnel construction, waterway, and marine construction. Key ...
Creve Coeur, MO · Hybrid
$107K - $190K/yr
From field engineering to project management to quality and startup, you'll work with cuttingedge ... dams and hydro facilities, tunnel construction, waterway, and marine construction. Key ...
Cahokia Heights, IL · On-site
$26.92 - $54.83/hr
Works with other mechanics, engineers, and boiler operators to complete work orders, preventive ... hydro flush machines. * Able to use stairwells to move from floor to floor. * Able to lift or ...
Quick apply
Cahokia Heights, IL · On-site
$26.92 - $54.83/hr
Works with other mechanics, engineers, and boiler operators to complete work orders, preventive ... hydro flush machines. * Able to use stairwells to move from floor to floor. * Able to lift or ...
East Saint Louis, IL · On-site
$23.50 - $32.25/hr
Works with other mechanics, engineers, and boiler operators to complete work orders, preventive ... hydro flush machines. * Able to use stairwells to move from floor to floor. * Able to lift or ...
East Saint Louis, IL · On-site
$23.50 - $32.25/hr
Works with other mechanics, engineers, and boiler operators to complete work orders, preventive ... hydro flush machines. * Able to use stairwells to move from floor to floor. * Able to lift or ...
$12.11 - $15.88
9% of jobs
$18.80 is the 25th percentile. Wages below this are outliers.
$15.88 - $19.65
21% of jobs
$19.65 - $23.42
12% of jobs
The median wage is $27.19 / hr.
$23.42 - $27.19
9% of jobs
$27.19 - $30.96
13% of jobs
$34.06 is the 75th percentile. Wages above this are outliers.
$30.96 - $34.74
15% of jobs
$34.74 - $38.51
9% of jobs
$38.51 - $42.28
3% of jobs
$42.28 - $46.05
3% of jobs
$46.05 - $49.82
4% of jobs
$49.82 - $53.59
3% of jobs
$12
$29
$53
| Aspect | Hydro Engineering | Civil Engineering |
|---|---|---|
| Required Credentials | Bachelor's in Civil, Environmental, or Hydraulic Engineering; Professional Engineer (PE) license often preferred | Bachelor's in Civil Engineering; PE license common for advanced roles |
| Work Environment | Field sites near water bodies, dams, hydroelectric plants, and water treatment facilities | Construction sites, urban planning projects, infrastructure development |
| Industry Usage | Specialized in water resources, hydroelectric power, and water management projects | Broad industry applications including transportation, structural, environmental, and water projects |
Hydro Engineering focuses specifically on water-related projects like dams and hydroelectric systems, requiring specialized knowledge of hydraulics and water resources. Civil Engineering covers a wider range of infrastructure projects, including roads, bridges, and water systems, often overlapping in water-related work but with broader scope. Both roles require similar credentials but differ in specialization and work environment.
Cities near O Fallon, IL with the most Hydro Engineering job openings:

$111K - $215K/yr
Full-time
Medical, Retirement, PTO
Posted 13 days ago
About Ameren Missouri
Ameren Missouri has been providing electric and gas service for more than 100 years, and our electric rates are among the lowest in the nation. Ameren Missouri's mission is to power the quality of life for our 1.2 million electric and 132,000 natural gas customers in central and eastern Missouri. Our service area covers 64 counties and more than 500 communities including the greater St. Louis area.
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 parentalleave and family caregiver leave
Visit our Benefits & Perks Page for more information on benefits provided to regular full-time employees.
About The Position
The Mechanical (ME) Engineer performs engineering studies, designs, technical specification development, construction, and commissioning activities for new natural gas combined cycle(NGCC) and simple cycle gas turbine(SC) energy centers for Ameren Missouri. In addition, this role may require support for projects at other existing or new Power Operations Generation facilities including fossil, gas, hydro and renewable. The position will include project support duties that may require long and/or non-standard work hours. The Mechanical Engineer will report to Manager - New Gas Generation.
Key responsibilities include:
Bachelor of Science Degree in Mechanical, Nuclear or Chemical engineering from an accredited college or university required. Missouri Professional Engineer (P.E.) License or commitment to actively pursue one in Missouri preferred. Project Management Professional (PMP) certification preferred. Ten or more years of engineering experience in simple cycle, combined cycle or Rankin cycle experience preferred.
In addition to the above qualifications, the successful candidate will demonstrate:
Candidate must have good analytical, communication and interpersonal skills. Candidate must also have capability to work effectively as part of a project team with the ability to handle and prioritize multiple assignments and projects. Must be highly adaptable to a changing industry and willing to stay current with the latest industry technologies. Willing to travel to project site locations. Overnight travel is expected to be limited.
*Technical career path level depends upon applicants' credentials and position market pay level.
Additional InformationAmeren'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:
$111,100.00 - $215,300.00* This pay range encompasses multiple levels of the role. Career level and compensation depends upon applicant's credentials.
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:
Tuesday August 25, 2026All 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.