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

Sr. Mechanical Engineer

PEAK Technical Staffing USA

Job Summary

An experienced Senior Mechanical Engineer is sought to support projects across municipal infrastructure, water and wastewater, building systems, industrial process facilities, utility and power infrastructure, and life sciences markets. The role involves independently executing and leading mechanical engineering assignments at the project level, leading mechanical design activities, managing assigned mechanical scope, coordinating multidisciplinary interfaces, and directing and reviewing the work of engineers and designers assigned to projects.

Key Responsibilities
  • Mechanical Engineering & Design
    • Independently lead the planning, analysis, design, and specification of mechanical systems and equipment
    • Develop project design criteria, calculations, equipment selections, specifications, data sheets, drawings, and construction documents
    • Evaluate existing mechanical systems and develop recommendations for rehabilitation, replacement, or improvement
    • Evaluate equipment and system alternatives considering performance, reliability, constructability, maintainability, cost, and client requirements
    • Apply sound engineering judgment to resolve project-specific technical issues
    • Review vendor drawings, equipment submittals, technical proposals, and supplier documentation
    • Support equipment procurement, installation, startup, commissioning, and troubleshooting
  • Project Leadership & Delivery
    • Serve as Mechanical Lead on projects of varying size and complexity
    • Independently manage assigned mechanical engineering scope, schedule, budget, and technical deliverables
    • Develop scopes of work, engineering estimates, and man-hour requirements
    • Direct and review work performed by engineers and designers assigned to the mechanical scope and take responsibility for the completeness and technical quality of that work
    • Coordinate mechanical engineering activities and interfaces with other engineering and architectural disciplines
    • Participate in multidisciplinary design and constructability reviews
    • Identify technical, scope, schedule, and budget concerns and communicate them proactively to Project Management
    • Ensure mechanical deliverables meet project requirements, applicable codes, client standards, and quality expectations
    • Recognize technical issues requiring Principal Engineer or specialized technical input and engage appropriate resources
  • Field & Construction Support
    • Perform field investigations and assessments of existing facilities and mechanical systems
    • Develop recommendations for modifications, upgrades, and equipment replacement
    • Resolve field and construction issues within the engineer's area of responsibility
    • Review RFIs, equipment submittals, shop drawings, and proposed field modifications
    • Participate in construction meetings, equipment inspections, startup, and commissioning
    • Incorporate constructability, maintainability, accessibility, operational requirements, and personnel safety into mechanical designs
  • Quality & Mentorship
    • Review calculations, specifications, drawings, equipment selections, and other work prepared by engineers and designers
    • Provide technical guidance and mentorship to developing engineers and designers
    • Provide clear and constructive technical feedback
    • Contribute to department standards, specifications, procedures, calculation methods, and design tools
    • Share technical knowledge and lessons learned across project teams
    • Support department QA/QC activities
  • Client & Business Development Support
    • Work directly with client engineering, operations, and project representatives
    • Participate in client meetings, planning sessions, presentations, and technical discussions
    • Understand client operational requirements and translate them into practical engineering solutions
    • Support proposals, scope development, engineering estimates, and project pursuits
    • Develop strong working relationships with clients, contractors, and equipment vendors
Technical Competencies

The successful candidate will demonstrate strong mechanical engineering fundamentals and technical competence in one or more areas of mechanical engineering, including:
  • Municipal infrastructure and water/wastewater
  • Building mechanical systems
  • Power generation and energy
  • Industrial and central utility systems
  • Industrial and process facilities
  • Mechanical equipment and piping systems
  • Pharmaceutical and life sciences facilities
The candidate shall demonstrate:
  • Ability to independently develop and review mechanical calculations, specifications, data sheets, equipment selections, drawings, and construction documents
  • Working knowledge of applicable codes and standards, which may include ASME, ASHRAE, AWWA, NFPA, API, IMC, IPC, IBC, and applicable state and local requirements
  • Experience with applicable mechanical engineering analysis and design software
  • Working knowledge of AutoCAD and/or Revit sufficient to coordinate with and direct engineering designers
  • Ability to communicate engineering issues and recommendations clearly to technical and non-technical stakeholders
Qualifications

Required
  • Bachelor's Degree in Mechanical Engineering from an accredited institution
  • 6 years of progressively responsible mechanical engineering experience
  • Demonstrated ability to independently execute mechanical engineering design assignments
  • Experience leading mechanical scopes on multidisciplinary projects
  • Experience progressing projects from planning and design through construction
  • Ability to develop and review calculations, specifications, drawings, equipment selections, and technical deliverables
  • Ability and willingness to travel to client and project sites as required
  • Strong engineering judgment, communication, and organizational skills
  • Must be able to work in the United States without sponsorship now or in the future
Preferred
  • Professional Engineer (PE) license or ability to obtain PE registration
  • Experience serving as Mechanical Lead or responsible Mechanical Engineer
  • Experience mentoring engineers and designers
  • Experience across multiple mechanical system types or markets
  • Experience with rehabilitation and modernization of existing facilities
  • Experience supporting proposals, project estimates, and client development

What Success Looks Like

A successful Senior Mechanical Engineer can independently lead a mechanical engineering scope from planning through construction. The Senior Engineer determines what work is required, develops and coordinates the design, directs assigned engineers and designers, manages scope, schedule, and budget, and delivers complete, technically sound work with limited supervision. The Senior Engineer applies sound engineering judgment, identifies project and technical risks early, and recognizes when complex or unfamiliar issues require Principal Engineer or specialist involvement.

Located in a vibrant city offering a blend of cultural, recreational, and professional opportunities, this position provides an excellent environment for career growth and personal development.

Benefits
PEAK's benefit offerings available for our associates include medical, dental, vision, Flexible Spending Account (FSA), Dependent Care Savings Account (DCA), and 401K plan. PEAK believes that taking care of our team is essential for success and we are proud to provide benefits that enhance both your well-being and your future. Additionally, our associates may be eligible for Paid Sick Leave as required by Federal, State, or local laws.


Equal Opportunity Employer (EEO)
PEAK Technical Staffing is committed to creating a diverse and inclusive environment and is proud to be an Equal Opportunity Employer. PEAK does not discriminate on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, or veteran status, or any other characteristic protected by applicable law. All employment decisions are made based on qualifications, merit, and business need. We encourage all individuals to apply.


Americans Disabilities Act (ADA)
The physical and mental requirements described in this job description are representative of those that must be met by an employee to successfully perform the essential functions of the position. Reasonable accommodations may be made to enable qualified individuals with disabilities to perform the essential functions. Must be able to perform the essential physical functions of the position, including sitting, standing, walking, stooping, kneeling, and lifting up to 25 pounds, with or without reasonable accommodation.


Candidate Privacy
To read our Candidate Privacy Information Statement, which explains how we will use your information, please navigate to and


AI Recruiting Disclosure
We use AI-assisted tools to help review applications and compare your experience to job requirements, but all hiring decisions are made by human recruiters. You may request a human-only process or opt out of automated communication at any time. Required notices and our latest bias audit are available on our website:
Vacancy posted 2 days ago
Similar jobs that could be interesting for youBased on the Sr. Mechanical Engineer in Lombard, IL vacancy
  •  ...Job Title Mechanical Design Engineer About Our Client Our client is a worldwide environmental technology company with customers all over the globe. They partner customers in highly-regulated environments and provide them with solutions to monitor, measure, and... 
    Senior
    Local area
    Worldwide
    Flexible hours

    Michael Page

    Elmhurst, IL
    1 day ago
  • $102.5k - $138.5k

     ...Senior Mechanical Engineer As Chemring Energetic Devices (CED) celebrates 50 years of building products that protect our country, protect the individual warfighter, and send rockets into outer space, our growth is creating new opportunities to expand our team with talented... 
    Senior
    For contractors
    Work at office
    Shift work

    CHG Group, Inc

    Downers Grove, IL
    4 days ago
  • $28k

     ...Senior Mechanical Engineer Downers Grove, IL, US About You: Do you have an entrepreneurial spirit and a passion for engineering? Do you love designing and implementing complex electrical systems? Are you looking for a company that is constantly trying to push... 
    Senior
    For contractors
    For subcontractor
    Local area

    ARCO a Family of Construction Companies

    Downers Grove, IL
    1 day ago
  • $90k - $120k

     ...Job Description Job Description Title: Senior Mechanical Engineer Location: Downers Grove, IL (in office 3 days a week) Hire Type:...  ...Opportunity: Sterling Engineering's client is looking for a Sr. Mechanical Engineer to join their organization and eventually... 
    Senior
    Work at office
    Shift work
    3 days per week

    Sterling Engineering Inc.

    Downers Grove, IL
    14 days ago
  • $100k - $130k

     ...entrepreneurial environment of a growing technology venture combined with the resources, stability, and engineering expertise of a global industry leader. This role leads the mechanical design, product validation, and manufacturing development of BoundaryCool thermal management... 
    Senior
    Flexible hours

    Molex

    Lisle, IL
    6 days ago
  •  ...Job Description Job Description Valdes Architecture & Engineering is seeking an experienced Senior Mechanical Engineer to support projects across municipal infrastructure, water and wastewater, building systems, industrial process facilities, utility and power infrastructure... 
    Senior
    For contractors
    Local area

    Valdes Architecture & Engineering

    Lombard, IL
    10 days ago
  • $48 - $58 per hour

     ...Job Description Description Reason for Opening: The Engineering Team at our client is preparing to launch four new products,...  ...different stages of the product lifecycle. They are seeking a Sr. Mechanical Engineer to support product design, manage the process from... 
    Senior
    Contract work
    Temporary work
    Work at office

    Actalent

    Schaumburg, IL
    2 days ago
  • $145k - $185k

     ...Valdes Architecture & Engineering is seeking an accomplished Principal Mechanical Engineer to provide senior technical leadership across municipal infrastructure, water and wastewater, building systems, industrial process facilities, utility and power infrastructure, and... 
    Local area

    Valdes Architecture & Engineering

    Lombard, IL
    2 days ago
  • $93k - $123.3k

    Our employee-owned and multi-disciplined team, has an opportunity available for a Professional Mechanical Engineer who has extensive experience modeling and designing HVAC, plumbing, and other mechanical systems for industrial and commercial facilities to join our Facilities... 
    H1b
    Work at office
    Work from home
    Visa sponsorship
    Work visa
    Flexible hours
    Night shift

    TKDA

    Downers Grove, IL
    4 days ago
  •  ...CMTA, a Legence company CMTA ( is one of the fastest growing engineering firms in the U.S., with nationally recognized expertise in...  ...opportunities. Position Overview: CMTA is seeking a Senior Mechanical Engineer with 7+ years of experience in consulting... 
    Senior
    Contract work
    For contractors
    Work at office
    Local area
    Immediate start
    Flexible hours

    CMTA Inc

    Oak Park, IL
    5 days ago
  • $122.4k - $154k

     ...Primary Purpose of Position Performs advanced technical/engineering problem solving in support of nuclear plant operations while...  ...Engineering (Chemical, Civil/Structural, Electrical, Industrial, Mechanical or Nuclear) with 5 years of nuclear experience or related... 
    Senior
    Temporary work
    Local area

    Constellation

    Warrenville, IL
    5 days ago
  • $110k - $127k

     ...such as experience, education, certifications, and skills, as well as geographic considerations. We are seeking a Senior Mechanical Engineer to work with our Engineering team. This position manages facility and manufacturing improvement projects, develops plans, and... 
    Senior

    INX International Ink

    West Chicago, IL
    4 days ago
  • $120k - $160k

     ...Your Job Molex is seeking an innovative Senior Mechanical Engineer to join our R&D team. This team is responsible for the conceptualization of industry leading fiber optic interconnect solutions and systems in rapidly growing markets in cloud computing, AI, and hyperscale... 
    Senior
    Flexible hours

    Koch Industries

    Lisle, IL
    5 days ago
  • $74.5k - $100k

     ...Manufacturing Welding Engineer As Chemring Energetic Devices (CED) celebrates 50 years of building products that protect our country, protect the individual warfighter, and send rockets into outer space, our growth is creating new opportunities to expand our team with... 
    Work at office
    Shift work

    CHG Group, Inc

    Downers Grove, IL
    8 hours ago
  • As part of Molex's strategic collaboration with CAEPlus, this role advances CAEPlus technologies within Molex. You will lead mechanical design and validation of BoundaryCool thermal solutions, owning cold-plate design and manufacturing drawings while partnering with the... 
    Senior

    Molex

    Lisle, IL
    3 days ago
  • $152k - $159k

    Requisition ID: 181814 Job Level: Mid Level Home District/Group: Kiewit Nuclear Solutions Department: Design Engineering Market: Nuclear Employment Type: Full Time Position Overview Are you looking for an opportunity to be a part of a new, emerging nuclear market?... 
    Senior
    Full time
    Casual work
    Weekend work

    Kiewit

    Itasca, IL
    4 days ago
  • Koch Industries, in collaboration with Molex and CAEPlus, seeks a mechanical design engineer to lead the design and validation of BoundaryCool thermal management solutions for the CAEPlus Phase I program. You will own detailed design of cold plates, active module integration... 
    Senior

    Flint Hills Resources

    Lisle, IL
    3 days ago
  • ENFRA LLC seeks a Mechanical Engineer PE II to sign and seal engineering documents, analyze and improve systems, and lead projects with direct client interaction. The role emphasizes strong problem-solving, communication, and technical expertise in a fast-paced environment... 
    Senior

    ENFRA LLC

    Westmont, IL
    2 days ago
  •  ...Summary: The Project Engineer is a key member of the Project Engineering team for the successful and timely execution of assigned...  ...scope, schedule, and execution. Qualifications: ~ BS in Mechanical Engineering or a related discipline ~5+ years experience... 
    Contract work
    Work at office
    Local area
    Flexible hours

    PEAK Technical Staffing USA

    Downers Grove, IL
    1 day ago
  •  ...Mechanical Engineer RWE Design Build is seeking a Mechanical Engineer to support our growing portfolio of projects in the veterinary, dental, and medical sectors. This role focuses primarily on HVAC system design within an integrated design-build environment. What You... 
    Temporary work
    Work at office

    RWE Management Company

    Downers Grove, IL
    3 days ago
  • $71.5k - $89.5k

     ...Mechanical Engineer I As Chemring Energetic Devices (CED) celebrates 50 years of building products that protect our country, protect the individual warfighter, and send rockets into outer space, our growth is creating new opportunities to expand our team with talented... 
    Work at office
    Shift work

    CHG Group, Inc

    Downers Grove, IL
    4 days ago
  • $115k - $167.5k

    Bloomington, Minnesota / Milwaukee, Wisconsin / Downers Grove, IllinoisFacilities Engineering - Mechanical /Full Time (40) /HybridTKDA is a 100% employee-owned engineering, architecture, and design firm seeking a Senior Professional Mechanical Engineer to join our Facilities... 
    Senior
    Full time
    H1b
    Visa sponsorship
    Work visa
    Monday to Friday
    Night shift

    TKDA

    Downers Grove, IL
    1 day ago
  • $110k - $130k

     ...Job Description Job Description Title: Senior Mechanical Engineer Location: Downers Grove, IL (Must be in office 5 days a week) Hire Type: Direct Hire Shift/Hours: 1st, 8am - 5pm (Mon-Fri) Base Salary: $110k - $130k (based on experience) Benefits... 
    Senior
    Work at office
    Shift work

    Sterling Engineering Inc.

    Downers Grove, IL
    3 days ago
  • $85k - $100k

     ...equipment that supports efficient manufacturing operations. Key Responsibilities Design mechanical systems and components using CAD software Perform engineering analysis, calculations, and simulations to validate designs and ensure performance standards are... 
    Permanent employment
    Temporary work
    Work at office
    Local area

    LHH Recruitment Solutions

    Glendale Heights, IL
    1 day ago
  • $102.5k - $138.5k

     ...discounts. CED follows a 9/80 work schedule allowing employees to enjoy alternating Fridays off. JOB SUMMARY: CED's Senior Mechanical Engineer holds technical accountability in developing new products and supporting existing legacy devices for military, aerospace,... 
    Senior
    For contractors
    Work at office
    Shift work

    Chemring Energetic Devices, Inc

    Downers Grove, IL
    23 days ago
  • ENFRA LLC is seeking a Mechanical Engineer PE III to apply standard engineering techniques to design, analyze, test, maintain, repair, or improve products, components, or assemblies. The role requires signing and sealing documents, leading projects, and interacting with... 
    Senior

    ENFRA LLC

    Westmont, IL
    4 days ago
  • Brindley Engineering Corporation in Illinois seeks a detail-oriented mechanical engineer to lead field evaluations of in-service equipment and piping systems, diagnosing reliability issues and designing for rehabilitation. You will perform calculations, develop repair... 
    Senior
    For contractors

    Brindley Engineering Corporation

    Lisle, IL
    2 days ago
  • $100k - $130k

     ...entrepreneurial environment of a growing technology venture combined with the resources, stability, and engineering expertise of a global industry leader.This role leads the mechanical design, product validation, and manufacturing development of BoundaryCool thermal management... 
    Senior
    Flexible hours

    Molex

    Lisle, IL
    4 days ago
  • BW Design Group in Oak Brook, IL, seeks a Sr. Licensed Mechanical Engineer to lead the design of mechanical systems for manufacturing facilities. You will develop conceptual and detailed designs for HVAC, plumbing, piping, and industrial gas distribution, working with... 
    Senior

    BW Design Group

    Oak Brook, IL
    6 days ago
  • $120k - $150k

     ...Description Designs and engineers structural packaging solutions using corrugate and folding carton substrates, translating customer...  ...occasionally be exposed to hazardous materials or near moving mechanical parts while on the production floor. Salary Description... 
    Work at office

    MITTERA

    Berkeley, IL
    2 days ago

Do you want to receive more vacancies?

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