Mechanical Engineer PE II
Creve Coeur, MO
Experience: 7
Category: Engineering
Contractor Work Model: Hybrid
Brand: System One
Compensation Range: 115000.00 - 175000.00
Job ID: 381637
Date Posted: 10/07/2026
Shortcut: http://jobs.systemone.com/xG4bS4
Job Title: Mechanical Engineer PE II
Location: Creve Coeur, MO
Type: Direct Hire
Compensation: $115,000.00 - $175,000.00
Work Model: Hybrid – onsite and remote
Overview
The Mechanical Professional Engineer II (PE II) independently applies advanced engineering techniques to design and coordinate mechanical systems for energy and infrastructure projects across hospital and college campuses. This role leads portions of projects, developing code-compliant, constructible designs for HVAC, hydronic, and thermal plant systems while solving complex technical challenges. The PE II collaborates with multidisciplinary teams to integrate designs with existing facilities, supports permitting and procurement, and addresses field conditions. Responsibilities include producing accurate calculations and documentation and delivering systems that meet performance, reliability, and energy efficiency objectives consistent with design-build delivery model.
Responsibilities
• Independently applies advanced engineering techniques to design and coordinate mechanical systems for energy and infrastructure projects across hospital and college campuses.
• Leads portions of projects, developing code-compliant, constructible designs for HVAC, hydronic, and thermal plant systems while solving complex technical challenges.
• Collaborates with multidisciplinary teams to integrate designs with existing facilities, supports permitting and procurement, and addresses field conditions.
• Produces accurate calculations and documentation, delivering systems that meet performance, reliability, and energy efficiency objectives consistent with ENFRA’s design-build delivery model.
• Responsible for signing and sealing engineering documents.
• Leads design and analysis of mechanical systems for projects of moderate complexity.
• Develops project deliverables including calculations, drawings, and technical specifications.
• Improves existing systems and supports development of new solutions.
• Prepares detailed system configurations and control schemes emphasizing long-term energy savings.
• Conducts field investigations and supports site visits.
• Coordinates and plans 3D laser scanning efforts.
• Coordinates with internal disciplines and supports construction-phase activities.
• Performs work with a high degree of latitude, resolving complex technical issues independently.
• Provides informal mentorship to junior engineers and designers.
• Interfaces directly with clients on technical matters.
• May act as task lead or discipline lead on projects.
Requirements
• Bachelor's degree in architectural engineering, mechanical engineering, or related.
• 7+ years of design experience.
• Professional Engineer (PE) License.
• Advanced knowledge of mechanical systems and design practices.
• Strong problem-solving and decision-making skills.
• Experience in coordinating multidisciplinary deliverables.
• Strong communication and technical writing skills.
Additional Details
• 10-25% travel to job sites.
• Prolonged periods of office work sitting at a desk and working on a computer.
• Occasional field survey in loud, peak/low temperatures, and/or elevated locations.
• Repeating motions involving wrists, hands, and fingers.
• Light work involving objects up to 20 pounds.
System One, and its subsidiaries including Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.
System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.
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