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Hydro Engineering Jobs in O Fallon, IL (NOW HIRING)

... 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 ...

Mechanical Engineer

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 ...

Systems Engineer 3

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.

Technician

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 ...

Estimator

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 ...

Electrician II

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 ...

Electrician II

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 ...

Hydro Engineering information

See O Fallon, IL salary details

$12

$29

$53

How much do hydro engineering jobs pay per hour?

As of Sep 8, 2026, the average hourly pay for hydro engineering in O Fallon, IL is $29.43, according to ZipRecruiter salary data. Most workers in this role earn between $18.85 and $35.43 per hour, depending on experience, location, and employer.

What is hydro engineering?

Hydro engineering, also known as hydraulic engineering, is a branch of civil engineering focused on the flow and conveyance of fluids, primarily water. It involves the design, construction, and maintenance of structures such as dams, canals, levees, floodways, and water treatment plants. Hydro engineers work to manage water resources, prevent flooding, and ensure the safe supply of water for various uses including agriculture, industry, and municipalities. This field plays a crucial role in sustainable development and environmental protection.

What are the key skills and qualifications needed to thrive as a hydro engineer, and why are they important?

To thrive as a Hydro Engineer, you need a solid background in civil or environmental engineering, hydrology, and project management, usually supported by a relevant engineering degree and professional licensure. Expertise with design and simulation software such as AutoCAD, HEC-RAS, and GIS, along with familiarity with regulatory standards, is typically required. Strong problem-solving, teamwork, and communication skills help Hydro Engineers effectively collaborate and manage complex projects. These abilities are crucial for designing safe, efficient water infrastructure and ensuring compliance with environmental and safety regulations.

What are some common challenges faced by hydro engineers when working on large-scale water infrastructure projects?

Hydro engineers working on large-scale water infrastructure projects often encounter challenges such as managing complex environmental regulations, coordinating with multidisciplinary teams, and ensuring the sustainability of water resources. Additionally, they must address technical issues like sediment control, structural integrity under varying water conditions, and integration with existing infrastructure. Effective communication and project management skills are essential for overcoming these hurdles and delivering successful outcomes.

What is the difference between Hydro Engineering vs Civil Engineering?

AspectHydro EngineeringCivil Engineering
Required CredentialsBachelor's in Civil, Environmental, or Hydraulic Engineering; Professional Engineer (PE) license often preferredBachelor's in Civil Engineering; PE license common for advanced roles
Work EnvironmentField sites near water bodies, dams, hydroelectric plants, and water treatment facilitiesConstruction sites, urban planning projects, infrastructure development
Industry UsageSpecialized in water resources, hydroelectric power, and water management projectsBroad 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.

How much do hydro engineers make?

Hydro engineers typically earn a median annual salary of around $80,000 to $100,000, depending on experience, location, and level of education. Senior or specialized hydro engineers can earn higher salaries, especially when working on large-scale projects or in regions with high demand for water infrastructure expertise.

What does a hydro engineer do?

A hydro engineer designs, develops, and manages systems related to water resources, such as dams, pipelines, and hydroelectric power plants. They analyze water flow, perform site assessments, and use engineering software to ensure efficient and safe water infrastructure. Hydro engineers often require knowledge of fluid mechanics, environmental regulations, and may hold certifications in civil or environmental engineering.

What cities near O Fallon, IL are hiring for Hydro Engineering jobs?

Cities near O Fallon, IL with the most Hydro Engineering job openings:

Infographic showing various Hydro Engineering job openings in O Fallon, IL as of August 2026, with employment types broken down into 91% Full Time, 4% Part Time, 4% Contract, and 1% Nights. Highlights an 86% Physical, 5% Hybrid, and 9% Remote job distribution, with an average salary of $61,215 per year, or $29.4 per hour.

$111K - $215K/yr

Full-time

Medical, Retirement, PTO

Posted 13 days ago


Job description

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:

  • Responsible for the development and review of mechanical engineering specific requirements for existing generating fleet, new simple cycle and new combined cycle generation projects.
  • Lead mechanical engineering technical support for all phases of simple cycle, combined cycle and other generation projects.
  • Create, review, and participate in projects design, planning, and constructability reviews, value engineering, permitting, risk review, and lessons learned.
  • Develop equipment specification for simple cycle and combined cycle power island equipment and auxiliary support equipment.
  • Develop construction specifications and complete bid documents, direct drawing preparation and assist in providing cost estimates.
  • Interact and collaborate with various engineering groups, vendors, contractors, architect/engineering firms, and internal customers to achieve project objectives.
  • Assist or lead in the planning, project oversight/management, inspections, and commissioning of projects.
  • Review shop drawings, perform site visits and inspections during construction, and use problem solving skills to develop timely resolutions to field issues.
  • Experience in the following commercial software applications is preferred: AutoCAD, FATHOM and Bluebeam. High proficiency in MS Office applications.
Qualifications

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 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:

$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, 2026

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.