Sign up to access all features of our service.
  • Job search
  • Favorites
  • Create a CV
    New
  • Salaries
  • Subscriptions

Mechanical Engineer III

CRB

Job Description

Job Description

Company Description

CRB is a leading provider of sustainable engineering, architecture, construction and consulting solutions to the global life sciences and food and beverage industries. Our more than 1,100 employees provide best-in-class solutions that drive success and positive change for our clients, our people and our communities. CRB is a privately held company with a rich history of serving clients throughout the world, consistently striving for the highest standard of technical knowledge, creativity and execution.

Job Description

As a Mechanical Engineer III, you’ll play a key role in designing mechanical systems for complex facilities while also taking ownership of project scope and mentoring junior team members. This is a great opportunity for an engineer who wants to grow into leadership while staying hands-on with design.

You’ll contribute across the full project lifecycle—from early concept through construction—working alongside a multidisciplinary team to deliver high-quality, coordinated solutions.

Core Responsibilities

Design & Engineering

  • Design HVAC and mechanical utility systems for new construction, renovations, and process-driven environments
  • Perform engineering calculations, including heating/cooling loads, energy modeling, and system sizing
  • Develop construction documents, including drawings, P&IDs, specifications, and system layouts
  • Select and specify equipment and ensure designs align with applicable codes and standards (ASHRAE, NFPA, etc.)

Project Ownership

  • Lead the mechanical scope for small to mid-sized projects or major portions of larger projects
  • Manage deadlines, deliverables, and mechanical budgets for assigned work
  • Contribute to all phases of design, including conceptual, schematic, design development, and construction

Collaboration & Coordination

  • Partner closely with architects, engineers, contractors, and clients to deliver coordinated designs
  • Participate in site visits, field surveys, and construction support activities (RFIs, submittals, punch lists)
  • Ensure designs are practical, constructible, and aligned with project goals

Team & Quality Leadership

  • Mentor and support the development of junior engineers and designers
  • Lead quality checks and ensure deliverables meet CRB standards
  • Contribute to continuous improvement and internal knowledge sharing
Qualifications

Minimum Qualifications

  • Bachelor’s degree in Mechanical or Architectural Engineering (ABET-accredited)
  • 5+ years of professional experience in mechanical system design (AEC environment preferred)
  • Professional Engineer (PE) license
  • Experience designing HVAC and mechanical systems for commercial or industrial facilities
  • Strong understanding of engineering fundamentals, codes, and industry standards

Preferred Qualifications

  • Experience in life sciences, pharmaceutical, biotech, laboratory, or food & beverage facilities
  • Familiarity with GMP environments or regulated industries
  • Proficiency with Revit, AutoCAD, and BIM tools
  • Experience working with contractors, vendors, and multidisciplinary teams
  • Exposure to sustainable design practices (LEED, WELL, etc.)
  • Experience with plumbing systems and/or field assessments

Additional Information

All your information will be kept confidential according to EEO guidelines.

CRB is committed to hiring and retaining a diverse workforce. We are proud to be an Equal Opportunity Employer and it is our policy to provide equal opportunity to all people without regard to race, color, religion, national origin, ancestry, marital status, veteran status, age, disability, pregnancy, genetic information, citizenship status, sex, sexual orientation, gender identity or any other legally protected category. Employment is contingent on background screening.

CRB does not accept unsolicited resumes from search firms or agencies. Any resume submitted to any employee of CRB without a prior written search agreement will be considered unsolicited and the property of CRB. Please, no phone calls or emails.

CRB offers a complete and competitive benefit package designed to meet individual and family needs.

If you are unable to complete this application due to a disability, contact this employer to ask for an accommodation or an alternative application process.

Vacancy posted 17 days ago
Similar jobs that could be interesting for youBased on the Mechanical Engineer III in Saint Louis, MO vacancy
  •  ...Process Engineer III We are seeking a highly motivated Process Engineer III to support the planning, design, and implementation of...  ...work closely with multidisciplinary teams, including process, mechanical, electrical, automation, architecture, and construction professionals... 
    Suggested

    CRB Group Inc.

    Saint Louis, MO
    2 days ago
  •  ...Project Engineer (III/IV) - Water/Wastewater Gonzalez Companies is a partner managed firm that provides comprehensive Planning, Design, and Construction Management Services to large and small Water, Sewer and Utility Districts; Departments of Transportation; and municipalities... 
    Suggested

    DRMP

    Saint Louis, MO
    10 hours ago
  • $40 - $55 per hour

     ...Project Engineer III/IV - Water/Wastewater Department: Water/Wastewater Employment Type: Full Time Location: St. Louis, MO Compensation: $40.00 - $55.00 / hour Description Gonzalez Companies is a partner managed firm that provides comprehensive... 
    Suggested
    Full time
    For contractors
    Local area
    Flexible hours

    Trilon Group

    Saint Louis, MO
    4 days ago
  • $85k - $115k

     ...Job Description Job Description Mechanical Engineer III Company Name: RTM Engineering Consultants Location: Any RTM office: Schaumburg, IL | Orlando, FL | Rogers/Bentonville, AR | Davenport, IA | Seattle, WA | Dallas, TX | Springfield, MO | Fort Collins,... 
    Suggested
    Work at office

    Luxus

    Saint Louis, MO
    19 days ago
  •  ...position supports Department of State Worldwide Protective Services III (WPS III) Task Orders (TO) in austere environments....  ...minimum must possess three (3) of the certifications listed below: Engine repair Automatic transmission/transaxle Manual drivetrain... 
    Suggested
    Worldwide
    Overseas
    Long distance

    Janus Global

    Saint Louis, MO
    4 days ago
  • $10k

     ...Position Overview: The Project Engineer III is an experienced structural engineer with demonstrated proficiency in structural analysis, design, and project documentation. Working under the direction of Project Executives and Project Managers, the Project Engineer III... 
    For contractors
    Relocation
    Relocation package
    Flexible hours

    Apex Structural Engineering, LLC

    Saint Louis, MO
    3 days ago
  •  ...Imaging Service Engineer III Tri-Imaging is seeking an experienced Imaging Service Engineer III (ISE III) to serve as a senior technical...  ..., gantry repairs, software recoveries, and complex mechanical or electrical repairs within certified modalities. Perform... 
    Work at office
    Remote work
    Relocation

    Tri-Imaging Solutions

    Saint Louis, MO
    4 days ago
  • $24.75 - $38.43 per hour

     ...The Maintenance Technician III supports the FedEx industrial maintenance of material...  ...prescribed processes as they relate to mechanical power transmission, electrical, PLC/controls...  ...schematics, manufacturer's manuals and engineering specifications to troubleshoot, diagnose... 
    Hourly pay
    Minimum wage
    Work at office
    Local area
    All shifts
    Flexible hours
    Day shift

    Federal Express Corporation

    Sauget, IL
    4 days ago
  •  ...The Maintenance Technician III is responsible for maintaining upkeep and repairs of the agency property as directed by the Lead Maintenance Technician. This position demonstrates commitment to the mission, vision, and values of the agency by engaging in respectful, cooperative... 
    Work at office

    EPWORTH CHILDREN & FAMILY SERVICES,

    Saint Louis, MO
    12 hours ago
  • $24.75 - $38.43 per hour

     ...Maintenance Technician III The Maintenance Technician III supports the FedEx industrial...  ...prescribed processes as they relate to mechanical power transmission, electrical, PLC/...  ...schematics, manufacturer's manuals and engineering specifications to troubleshoot, diagnose... 
    Hourly pay
    Minimum wage
    Work at office
    Local area
    All shifts
    Flexible hours
    Day shift

    FedEx

    Saint Louis, MO
    3 days ago
  • Job DescriptionThe Senior Building Mechanical (HVAC) Engineering role takes on more complex projects and leads the development of HVAC, plumbing, and fire sprinkler calculations. The role interprets mechanical, plumbing, building, and fire codes, as well as NFPA standards... 
    Full time
    Temporary work
    Remote work

    Brown and Caldwell

    Saint Louis, MO
    1 day ago
  • $80k - $140k

     ...Sales Engineer – HVAC Hiring Contact: Jacob Parish | ****@*****.*** Compensation: Below Join this dynamic team where...  ...solution selling, and building long-term relationships with mechanical contractors, engineers, and end-users. Responsibilities:... 
    For contractors

    gpac

    Saint Louis, MO
    2 days ago
  • $35.4 - $56.96 per hour

     ...Applied Daikin Applied is seeking a full-time Controls Technician III. In this role, you will be responsible for installation,...  ...instruments and calibration tools Competency in operation of engineering/commissioning tools, DDC controllers and field devices, BACnet... 
    Hourly pay
    Full time
    Local area

    Daikin U.S. Corporation

    Saint Louis, MO
    4 days ago
  •  ...Field Services Technician- Tier IIISocket is seeking a skilled Field Services Technician- Tier III to join our talented workforce. In this role, you'll deliver expert onsite installation services for residential customers. You'll play a key role in ensuring a seamless... 
    Local area
    Relocation
    Flexible hours
    Shift work
    Night shift

    Socket

    Saint Louis, MO
    3 days ago
  •  ...Process-Mechanical Engineer Our Process-Mechanical Engineer position offers an exciting opportunity for the selected candidate to be part of Donohue & Associates, a firm with national water/wastewater expertise in a small company environment. We are seeking an experienced... 
    Temporary work
    Flexible hours

    Donohue & Associates

    Saint Louis, MO
    11 hours ago
  • Wieland North America, Inc in Granite City, IL is hiring a Plant Maintenance Mechanic III to support recycling production systems. This on-site role requires diagnosing, repairing and maintaining plant equipment with a focus on safety and reliability. You will work Monday... 
    Monday to Friday

    Wieland North America, Inc

    Granite City, IL
    4 days ago
  • DescriptionAs a Mechanical Engineer, you will work on project teams to create world-class designs for new projects, alterations and redevelopments on a variety of power projects. The Mechanical Engineer will work with the project team throughout the design and construction... 
    Contract work
    Work at office

    Burns & McDonnell

    Saint Louis, MO
    2 days ago
  • DescriptionBurns & McDonnell is seeking to hire a Senior Mechanical Engineer to support our Power global practice. The Senior Mechanical Engineer will lead mechanical design project teams to create world class designs for both new and existing power generation facilities... 
    For contractors
    Work at office

    Burns & McDonnell

    Saint Louis, MO
    4 days ago
  •  ...Mechanical HVAC Project Engineer Premier Missouri based MEP firm has an immediate need for a seasoned engineer to come on board managing projects and designing cutting-edge HVAC systems for diverse building projects. Excellent opportunity to join a team where a family... 
    Immediate start

    Liberty Personnel Services, Inc.

    Saint Louis, MO
    1 day ago
  •  ...Leadership: Assign tasks to team members including support engineering staff and drafting technicians in a manner to execute...  ...efficiently and successfully. Provide training to EIT’s and other mechanical/refrigeration designers when/where needed. Review, approve... 
    Contract work
    Work at office
    Local area

    Cuhaci Peterson®

    Saint Louis, MO
    1 day ago
  •  ...result, we have a full-time position available for a refrigeration engineer. Responsibilities include conducting job-site surveys;...  ...have all of the following: Bachelor's degree (or higher) in mechanical engineering from an accredited four-year college or university... 
    Full time
    For subcontractor
    H1b
    Work at office
    Visa sponsorship

    Mead & Hunt

    Saint Louis, MO
    2 days ago
  • $85k - $115k

     ...Mechanical Engineer The successful candidate will design HVAC and Plumbing/Piping system for a variety of projects: institutional, manufacturing, community, hospital, financial, historic, commercial, manufacturing, educational. Tasks include: development of project... 

    gpac

    Saint Louis, MO
    4 days ago
  •  ...Ally, A Salas O'Brien Company, we tell our clients that we're engineered for impact. This passion for making a difference applies just as...  ...rewards along the way. Job Summary: The Electrical Engineer III provides expertise and support in a variety of areas including... 
    Local area
    Visa sponsorship
    Relocation package

    Salas O'Brien

    Chesterfield, MO
    9 hours ago
  • $88.41k - $110.46k

     ...Pittsburgh, PA. ABOUT THE ROLE You will be a member of our multi-disciplinary team and will work under the direction of a senior engineer. Projects may include new construction and renovation in educational, healthcare, sports, corporate commercial and science and... 
    For contractors
    Work experience placement
    Remote work
    Flexible hours

    CannonDesign

    Saint Louis, MO
    2 days ago
  •  ...opportunity? I'm partnering with one of the fastest-growing mechanical construction, engineering, and building automation organizations in the country,...  ...Santa Teresa, NM We're looking for: Project Managers (PM I–III, Senior PM, Project Directors) Preconstruction... 
    Immediate start

    gpac

    Saint Louis, MO
    13 hours ago
  •  ...Mechanical Design Engineer Work for Hydromat to grow and develop your career through intellectual challenges and opportunities. The Mechanical Design Engineer utilizes knowledge of engineering practices (mathematics, materials, manufacturing technology) to prepare... 
    Monday to Friday

    Hydromat

    Saint Louis, MO
    4 days ago
  •  ...Mechanical Engineer Responsible for supporting regional capital investment projects in the Americas Region, specifically at our site in Idaho. Shares ownership with other team members for successful project outcomes. Ensure compliance with industry and Bayer engineering... 

    Samprasoft

    Saint Louis, MO
    4 days ago
  •  ...Mechanical Design Engineer Laciny Bros., a custom fabrication company, is seeking a full-time mechanical design engineer to join our team! Since 1916, Laciny Bros. has specialized in custom fabrication that demands creativity, precision, and quality craftsmanship.... 
    Full time
    Local area

    Laciny Bros., Inc.

    Saint Louis, MO
    2 days ago
  •  ...Mechanical Field Engineer II Location: St. Louis, MO, Columbia MO , Kansas City , MO, or Topeka, KS Level: 6+ years of experience Department: 360 Construction Services Reports to: Operation Manager Company Profile At KAI, our company mission... 
    Full time
    Contract work
    For contractors
    Local area

    KAI Enterprises

    Saint Louis, MO
    1 day ago
  • DescriptionThe Senior Mechanical Engineer will lead mechanical design projects and teams to create world-class designs for new projects, alterations and redevelopments within the Life Sciences industry (Pharmaceutical and Biotech). The Senior Mechanical Engineer will lead... 
    For contractors
    Work at office

    Burns & McDonnell

    Saint Louis, MO
    1 day ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Mechanical Engineer III. Be the first to apply!