Mechanical Engineer III
CRB
Mechanical Engineer IIIAs 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 ResponsibilitiesDesign & EngineeringDesign HVAC and mechanical utility systems for new construction, renovations, and process-driven environmentsPerform engineering calculations, including heating/cooling loads, energy modeling, and system sizingDevelop construction documents, including drawings, P&IDs, specifications, and system layoutsSelect and specify equipment and ensure designs align with applicable codes and standards (ASHRAE, NFPA, etc.)Project OwnershipLead the mechanical scope for small to mid-sized projects or major portions of larger projectsManage deadlines, deliverables, and mechanical budgets for assigned workContribute to all phases of design, including conceptual, schematic, design development, and constructionCollaboration & CoordinationPartner closely with architects, engineers, contractors, and clients to deliver coordinated designsParticipate in site visits, field surveys, and construction support activities (RFIs, submittals, punch lists)Ensure designs are practical, constructible, and aligned with project goalsTeam & Quality LeadershipMentor and support the development of junior engineers and designersLead quality checks and ensure deliverables meet CRB standardsContribute to continuous improvement and internal knowledge sharingQualificationsMinimum QualificationsBachelor's degree in Mechanical or Architectural Engineering (ABET-accredited)5+ years of professional experience in mechanical system design (AEC environment preferred)Professional Engineer (PE) licenseExperience designing HVAC and mechanical systems for commercial or industrial facilitiesStrong understanding of engineering fundamentals, codes, and industry standardsPreferred QualificationsExperience in life sciences, pharmaceutical, biotech, laboratory, or food & beverage facilitiesFamiliarity with GMP environments or regulated industriesProficiency with Revit, AutoCAD, and BIM toolsExperience working with contractors, vendors, and multidisciplinary teamsExposure to sustainable design practices (LEED, WELL, etc.)Experience with plumbing systems and/or field assessmentsAll 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 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.
- 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...SuggestedWorldwide
- ...are a globally recognized Architecture, Engineering, and Construction (AEC) firm delivering... ...seeking a highly motivated Process Engineer III to support the planning, design, and... ...Bachelor's degree in Chemical Engineering, Mechanical Engineering, Biological Engineering,...Suggested
$80k - $95k
...small Water, Sewer and Utility Districts; Departments of Transportation; and municipalities. We are currently seeking a Project Engineer (III/IV) - Water/Wastewater to help serve our connection of clients and community. If you're hungry for knowledge, ready to make a difference...Suggested- ...Project Engineer (III/IV) - Water/WastewaterGonzalez 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
$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 Planning, Design, and...SuggestedFull timeFor contractorsLocal areaFlexible hours- ...Facility Electrical Engineer III Project ManagerMake an impact by joining ServiceSource, a champion for people with disabilities. Explore... ..., repair, construction technical drawings, specifications of mechanical/electrical systems, facility diagrams, or topographical maps...For contractorsWork at officeFlexible hours
- ...bringing our Mission to life every day to enable our customers to make the world healthier, cleaner, and safer. As a Quality Engineer III within the Product Quality organization, you will play a key role in supporting quality assurance activities for clinical and commercial...Full timeWork at officeRelocation package
$36 - $48 per hour
...Job Description Job Description Job Title: Quality Engineer III – Process Validation Job Description The Quality Engineer III – Process Validation plays a critical role in ensuring product quality and compliance across the entire lifecycle, from New Product Introduction...Contract workTemporary workMonday to FridayFlexible hours$83.37k - $113.78k
...Operations Engineer III in GAC St. Louis Unique Skills: The compensation range for this role is $83,365 - $113,780 per year... ...work with and support a multi-disciplined team of engineers, mechanics, technicians, managers, etc 3. Experience designing aircraft...Full timeShift work$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 payMinimum wageWork at officeLocal areaAll shiftsFlexible hoursDay shift$75k - $95k
...Job Description Job Description Crawford, Murphy & Tilly is seeking a Traffic Civil Engineer III in our St. Louis office to support transportation projects that improve safety, mobility, and connectivity throughout the communities we serve. This role is ideal...Work experience placementWork at office- ...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...Work at officeLocal areaAll shiftsFlexible hoursDay shift
- ...food is safe or helping find cures for cancer. Job Description How will you make an impact? We are searching for a Process Engineer 3- Floor Support with education and experience in biopharmaceutical processing or a related field. This member of our team...Full timeWork at office
- ...maintains its individual personality. Job Description The Design Engineer III is a seniorlevel engineering professional responsible for... ..., Skills & Abilities Bachelor's degree in Engineering (Mechanical, Electrical, Manufacturing, Industrial, or related discipline...WorldwideShift work
$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 payFull timeLocal area$92k - $115k
...and producing clean power. As a Lead Field Service Technician III- Solar, you’ll be the technical authority in the field — leading... ...ability to read and interpret complex electrical schematics and engineering drawings. Strong analytical, problem-solving, and decision-...Live inWork at officeLocal areaRelocationWork visaRelocation packageLong distanceFlexible hoursNight shiftDay shift- Nidec Motor Corporation seeks a Design Engineer III to lead the design and development of complex motors and subsystems from concept through release. The role emphasizes advanced engineering judgment, cross-functional collaboration, and a strong impact on product performance...
$32 - $38 per hour
..., & respect . Wieland is hiring a Plant Maintenance Mechanic III . The Plant Maintenance Mechanic III is part of a team that... ...Train / Mentor other Preventative Maintenance Technicians or Engineers in specific skills and conduct services as required. Actively...Hourly payWeekly payPermanent employmentApprenticeshipFor subcontractorWorldwideMonday to Friday- 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 invites applications for a Plant Maintenance Mechanic III in Granite City, IL. This on-site role maintains and repairs recycling production equipment, applying diagnostic and troubleshooting skills to keep systems running efficiently. Requires 7 years in maintenance...
- ...alongside people who think big and act bold - project managers, engineers, technologists, and strategists who blend real-world... ...WORK: You’ll perform independent design assurance reviews of mechanical engineering deliverables prepared by the EoR and major equipment...Temporary workFor contractorsWork at officeLocal areaFlexible hours
- 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 workWork at office
- 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 contractorsWork at office
- Zūm Services, Inc. is seeking a maintenance technician to keep our fleet of school buses safe and in top operating condition. You will diagnose malfunctions, perform repairs, and coordinate inspections to meet regulatory requirements. You will work on a range of diesel ...
- ...Process-Mechanical EngineerOur 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...
$80k - $95k
Project Engineer III/IV - Water/Wastewater Department: Water/Wastewater Employment Type: Full Time Location: St. Louis, MO Reporting To: Jeff Shiner Description Gonzalez Companies is a partner managed firm that provides comprehensive Planning, Design, and Construction...Full timeFor contractorsLocal areaFlexible hours- New Energy Equity seeks a Lead Field Service Technician III- Solar in the St. Louis area. You will command in-field inspections, mentor technicians, and own site-level execution with safety first. Master Electrician credentials and strong diagnostic ability are essential...Relocation packageWeekend work
$4,159 per month
...-01777 Opening Date: 09/02/2026 Closing Date: 09/17/2026 Agency: Department of Transportation Position Title: Engineering Technician III Salary: Anticipated Starting Salary: $4,159 Monthly; Full Range: $4,159 - $7,187 Monthly Job Type: Salaried Category...Full timeContract workTemporary workSeasonal workWork at officeImmediate startMonday to FridayFlexible hoursNight shift1 day per week$100k - $150k
...full-time position available for an Experienced Refrigeration Engineer to join our Food & Beverage group. This opportunity would be available... ...candidate must have:A bachelor's degree (or higher) in mechanical engineering from an accredited college or university AND at...Full timeFor subcontractorH1bWork at officeVisa sponsorship- 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 contractorsWork at office
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