Mechanical Engineer PE II

About Us

At ENFRA, we don’t just design—we deliver outcomes that transform how energy infrastructure is financed, built, and sustained.

As the leader in Energy‑as‑a‑Service (EaaS), we integrate engineering, design, construction, financing, and long‑term operations into a single, accountable team—removing traditional barriers between design and execution. This means our engineers don’t work in silos or simply hand off drawings; they help shape full‑lifecycle solutions that reduce costs, improve performance, and create measurable, lasting value for our clients.

Our approach goes beyond the traditional models. We combine real‑time collaboration with constructors, operators, and energy specialists to design systems that are not only technically sound—but constructible, operable, and optimized for lifecycle performance. Every project is grounded in accountability, data, and a commitment to delivering guaranteed outcomes—not just design intent.

Through our EaaS model, we empower clients to modernize infrastructure without upfront capital, while achieving guaranteed savings, improved resiliency, and long‑term sustainability. Our teams play a direct role in accelerating the energy transition—delivering solutions that decarbonize facilities, enhance operations, and future‑proof critical infrastructure.

At ENFRA, you’ll join a multidisciplinary team that spans the full project lifecycle—from concept through optimization—giving you the opportunity to see your work realized, measured, and continuously improved. We value practical innovation, cross‑disciplinary thinking, and engineers who want to make a real‑world impact beyond the drawing set.

If you’re looking to move beyond traditional design and be part of a model that is reshaping the industry—ENFRA is where engineering meets ownership, accountability, and impact

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 ENFRA’s design-build delivery model.

Responsibilities

• 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 with emphasis on long-term energy savings.

• Conducts field investigations and supports site visits. Coordinates and plans 3D laser scanning effort.

• Coordinates with internal disciplines and supports construction-phase activities.

• Performs work with a high degree of latitude.

• Resolves 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.

Qualifications

Required Education, Experience, and Qualifications

• 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 coordinating multidisciplinary deliverables

• Strong communication and technical writing skills

Preferred Education, Experience, and Qualifications

• Master's degree in Engineering

• Experience leading project workstreams

Travel Requirements

• 10-25% of time will be spent traveling to job sites

Physical/Work Environment Requirements

• Prolonged periods of office work sitting at a desk and working on a computer.

• Ascending and descending stairs, ladders, ramps, and possibly scaffolding.

• Occasionally completed field survey in loud, peak/low temperatures, and/or elevated locations.

• Repeating motions that may include the wrists, hands and/or fingers.

• Field survey, including traveling to job sites, to document existing conditions and observe construction progress.

• Light work that includes adjusting and/or moving objects up to 20 pounds.

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Pay Range

USD $116,860.00 - USD $175,562.50 /Yr.

ENFRA is proud to be an Equal Opportunity Employer of Minorities, Women, Protected Veterans, and Individuals with Disabilities, and participates in the e-Verify program. All qualified applicants will receive consideration for employment without regard to race, creed, color, religion, sex, age, sexual orientation, gender identity, national origin, veteran status, disability, or any other classification protected by law.

Submit a Referral (https://careers-enfra.icims.com/jobs/11391/mechanical-engineer-pe-ii/job?mode=apply&apply=yes&in\_iframe=1&hashed=-1834357758)

Software Powered by ICIMS

Job Locations US-MO-Creve Coeur

ID 2026-11391

Category Engineering/Designers

Position Type Full-Time

Remote No