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

#LI-JV1

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 20 days ago
Similar jobs that could be interesting for youBased on the Mechanical Engineer III in Saint Louis, MO vacancy
  •  ...Description CRB is a leading provider of sustainable engineering, architecture, construction and consulting solutions to the...  ..., creativity and execution. Job Description As a Mechanical Engineer III, you'll play a key role in designing mechanical systems for... 
    Suggested
    For contractors

    CRB

    Saint Louis, MO
    4 days ago
  • Process Engineer III/ IV - Small Molecule/ Oligo/ Peptide CRB is a leading provider of sustainable engineering, architecture, construction...  ...with cross-functional teams including architecture, mechanical, electrical, and construction. Prepare technical reports, proposals... 
    Suggested
    Worldwide

    CRB

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

     ...Job Description Job Description Position: Mechanical Engineer III Location: Seattle, WA / Newport, KY / Orlando, FL / Belleville, IL / St. Louis, MO / Milwaukee, WI / Bentonville, AR Years of Experience: 5+ Years About RTM: RTM Engineering Consultants... 
    Suggested
    Flexible hours

    RTM Engineering Consultants, LLC

    Saint Louis, MO
    24 days ago
  • Asplundh Careers is looking for a Design Engineer III for Substation Engineering in Maryland Heights, MO. In this role, you will contribute to complex energy infrastructure projects while collaborating with diverse teams. You will execute designs for substations and support... 
    Suggested

    Asplundh Careers

    Saint Louis, MO
    4 days ago
  • $80k - $95k

     ...design, and construction management services to water, sewer, and utility districts and municipalities. We are seeking a Project Engineer (III/IV) in Water/Wastewater to serve our clients and community. This role requires expertise in designing treatment facilities,... 
    Suggested
    For contractors
    Local area
    Flexible hours

    Gonzalez Companies, LLC

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

     ...Electrical Engineer III Location: Lakewood, CO / Fort Collins, CO / Avon, CO / Belleville, IL / St. Louis, MO / Milwaukee, WI / Schaumburg, IL / Bentonville, AR Years of Experience: 5+ Years About RTM: RTM Engineering Consultants is an MEP, Civil and Structural... 
    Flexible hours

    RTM Engineering Consultants

    Saint Louis, MO
    3 days ago
  • $80k - $95k

    Gonzalez Companies, LLC is seeking a Project Engineer (III/IV) in Water/Wastewater in St. Louis, MO. The role focuses on the design and oversight of treatment facilities and pipelines, requiring proficiency in hydraulic modeling and AutoCAD. Candidates should hold a Bachelor... 

    Gonzalez Companies, LLC

    Saint Louis, MO
    2 days ago
  • Job Overview EPS Engineering Services, a member of the Asplundh federation of companies, is hiring a Design Engineer III, Substation Engineering for our Maryland Heights, MO location. EPS is a national leader in transmission & distribution engineering, protection & control... 
    Temporary work

    Asplundh Engineering Services

    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
    7 days ago
  •  ...Mannik Smith Group is seeking a Transportation Project Engineer III/IV to join their team in Clayton, MO. The ideal candidate will have significant experience in transportation engineering, with a focus on design and project delivery. Key responsibilities include leading... 

    Mannik Smith Group

    Clayton, MO
    3 days ago
  • $31.6 - $50.37 per hour

     ...America's Best-In-State Employers 2025! Make your mark at the world's largest HVAC company Daikin Applied is seeking a Service Technician III . In this role, you will be responsible for diagnosing, repairing, and performing preventative maintenance for commercial and... 
    Hourly pay
    Local area
    Night shift

    Daikin Applied

    Saint Louis, MO
    3 days ago
  • $30 - $38 per hour

     ...Description: The Maintenance Technician III is a senior-level technical expert with a detailed understanding of facilities operations. This role is responsible for advanced troubleshooting, planning and executing complex repairs and upgrades, developing maintenance... 
    Hourly pay
    Full time
    For contractors

    DONALD DANFORTH PLANT SCIENCE CENTE

    Saint Louis, MO
    3 days ago
  • $70.5k - $80.5k

     ...Traffic and Safety Civil Engineer III Full Time St Louis, MO, US 8 days ago Requisition ID: 1427 Salary Range: $70,500.00 To $80,500.00 Annually Crawford, Murphy & Tilly is seeking a Civil Engineer III with a background in traffic and safety engineering to join our Surface... 
    Full time
    Work at office

    Crawford Murphy & Tilly

    Saint Louis, MO
    1 day ago
  • $36.59 - $50.29 per hour

     ...building control system. Participates in coordination and release meetings with sales and service operations. Performs value engineering to provide cost effective results while maintaining customer satisfaction. May provide work direction to Service Controls... 
    Hourly pay
    For contractors
    For subcontractor
    Worldwide

    Johnson Controls

    Saint Louis, MO
    3 days ago
  • $36.59 - $50.29 per hour

     ...total building control system. Participate in coordination and release meetings with sales and service operations. Perform value engineering to provide cost effective results while maintaining customer satisfaction. May provide work direction to Service Controls Technician... 
    Hourly pay
    For contractors
    For subcontractor

    Dormont Manufacturing Company

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

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

    Daikin Applied Americas

    Saint Louis, MO
    1 day ago
  • Dormont Manufacturing Co is seeking a Maintenance Mechanic III in St. Louis, Missouri, responsible for operating and maintaining critical electrical and plumbing systems. This role requires exceptional skills in communication and customer service to ensure safety and high... 

    Dormont Manufacturing Co

    Saint Louis, MO
    4 days ago
  •  ...repair issues independently with little to no supervision. This position will support large hospital campuses. The Maintenance Mechanic III provides the necessary skill to operate, maintain, and repair various electrical/plumbing systems and movable equipment. Utilizes... 
    Full time

    Dormont Manufacturing Co

    Saint Louis, MO
    3 days ago
  • Huvepharma in Saint Louis, MO 3rd Shift Maintenance Technician III, for its pharmaceutical production facility. This role will perform both mechanical and electrical tasks independently and be responsible for performing scheduled calibrations on specific equipment at the... 
    For contractors
    Work at office
    Shift work
    Night shift

    Huvepharma, Inc.

    Saint Louis, MO
    1 day ago
  • $36.59 - $50.29 per hour

    Dormont Manufacturing Co in St. Louis, Missouri is seeking an experienced professional for the service and repair of HVAC building control systems. You will design and configure complex systems to meet customer requirements and maintain high safety standards. The ideal ...
    Hourly pay

    Dormont Manufacturing Co

    Saint Louis, MO
    4 days ago
  •  ...energy solutions company in St. Louis is looking for a Technical Services Engineer (TSE) I to provide technical authority and direction in project delivery. Candidates should have a Professional Mechanical Engineering license and 4-6 years of experience in engineering design... 

    Enfrasolutions

    Saint Louis, MO
    2 days ago
  • $105k - $145k

     ...Process Mechanical Lead Engineer At Jacobs, we're challenging today to reinvent tomorrow by solving the world's most critical problems for thriving cities, resilient environments, mission-critical outcomes, operational advancement, scientific discovery and cutting-... 
    Full time
    Work at office
    Remote work
    Worldwide

    Jacobs Solutions

    Saint Louis, MO
    3 days ago
  •  ...systems. The ideal candidate will have considerable experience in the HVAC industry, advanced computer skills, and a bachelor's degree in engineering is preferred. Competitive salary and comprehensive benefits are provided. #J-18808-Ljbffr YDU JC Air Cond & Ref Inc.- Dubai

    YDU JC Air Cond & Ref Inc.- Dubai

    Saint Louis, MO
    5 days ago
  • $166.5k - $309.5k

     ...technical expertise in multiple areas of Process Technology or Mechanical Systems Engineering design. The role leads other engineers in executing...  ...Radioactive Waste building. Familiarity with ASME Section III design Understanding of ASME NQA-1 standards for nuclear... 
    Contract work
    For contractors
    Local area

    Fluor Corp

    Saint Louis, MO
    1 day ago
  • A recognized mechanical and controls contractor in St. Louis, MO is looking for a skilled Controls Applications Engineer. This role involves designing BAS system architecture, evaluating HVAC equipment, and assisting project teams. The ideal candidate has experience in... 
    For contractors

    ControlsJobs

    Saint Louis, MO
    3 days ago
  • Colliers is seeking a Lead Building Engineer in St. Louis, responsible for ensuring maintenance systems run efficiently to safeguard clients and properties. This role requires at least 5 years of experience in building maintenance and strong knowledge of HVAC systems.... 

    Colliers

    Saint Louis, MO
    3 days ago
  • Farnsworth Group is looking for a Sr. Mechanical Engineer of HVAC/Building Systems in St. Louis, MO. In this role, you will manage HVAC, plumbing, and specialty piping design for various facilities. The position requires a Bachelor's in Mechanical or Architectural Engineering... 

    Farnsworth Group

    Saint Louis, MO
    4 days ago
  • Jones Lang LaSalle Incorporated is seeking a Building Engineer for the 2ND SHIFT to operate, maintain, and repair critical building systems...  ...in St. Louis, MO. The role requires extensive experience in mechanical, electrical, plumbing, and HVAC systems, ensuring our... 
    Afternoon shift

    Jones Lang LaSalle Incorporated

    Saint Louis, MO
    5 days ago
  • $88.41k - $110.46k

     ...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 technology... 
    For contractors
    Work experience placement
    Remote work
    Flexible hours

    CannonDesign

    Saint Louis, MO
    14 hours ago
  •  ...Massman Construction Co. is seeking a Mid-Career Engineer in St. Louis, Missouri, focusing on on-site project administration and engineering for complex dam and water infrastructure projects. Candidates should have a Bachelor's degree in an engineering-related field,... 
    Contract work

    Massman Construction

    Saint Louis, MO
    4 days ago

Do you want to receive more vacancies?

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