gpac | The Recruitment Platform

Mechanical / Plumbing Design Engineer in Saint Louis

Date Posted: 15 October 2026

Job Snapshot

Job Description

Mechanical / Plumbing Design Engineer

Industry: Commercial Construction | Mechanical Engineering | MEP Design

Position: Full-Time | Direct Hire

Compensation: Highly Competitive, Based on Experience

Position Overview

We are partnering with a well-established, highly respected engineering firm seeking an experienced Mechanical / Plumbing Design Engineer to join its growing team. This is an excellent opportunity for a motivated professional who enjoys designing complex mechanical and plumbing systems, collaborating with talented engineers, and contributing to diverse commercial and institutional projects.

The ideal candidate will bring a strong technical background in HVAC and plumbing system design, proficiency with industry-standard design software, and a passion for delivering innovative, efficient, and code-compliant engineering solutions.

Key Responsibilities

  • Design and develop HVAC, mechanical, and plumbing systems for commercial, industrial, healthcare, institutional, and other building projects.
  • Prepare engineering drawings, calculations, specifications, and construction documents.
  • Design domestic water, sanitary waste and vent, storm drainage, natural gas, and specialty plumbing systems.
  • Perform HVAC load calculations, equipment sizing, ductwork design, piping layouts, and system selections.
  • Utilize Revit, AutoCAD, and other engineering design software to develop detailed construction drawings and 3D models.
  • Coordinate mechanical and plumbing designs with architectural, structural, electrical, and other engineering disciplines.
  • Ensure designs comply with applicable building codes, energy standards, and industry regulations, including ASHRAE, IPC, UPC, and local codes.
  • Participate in project meetings, design reviews, and coordination with clients, contractors, and project stakeholders.
  • Provide technical support throughout construction, including reviewing submittals, responding to RFIs, and addressing field-related design issues.
  • Assist with project planning, budgeting, scheduling, and quality control to ensure successful project delivery.

Qualifications

  • Bachelor's Degree in Mechanical Engineering or a related engineering discipline preferred.
  • 3+ years of experience in mechanical and/or plumbing design for commercial or institutional buildings preferred.
  • Strong understanding of HVAC systems, hydronics, mechanical piping, and plumbing system design.
  • Proficiency in Revit and AutoCAD; experience with BIM coordination highly desirable.
  • Knowledge of applicable mechanical, plumbing, and building codes.
  • Experience preparing construction documents, engineering calculations, and technical specifications.
  • Ability to manage multiple projects and meet deadlines in a collaborative environment.
  • Strong communication, organizational, and problem-solving skills.
  • EIT or Professional Engineer (PE) license preferred, but not required.
  • Experience with healthcare, higher education, commercial, or industrial projects is a plus.

What's in It for You?

  • Highly Competitive Compensation – Salary commensurate with experience and technical expertise.
  • Performance-Based Bonuses – Recognition and rewards for individual and company success.
  • Comprehensive Benefits Package – Medical, dental, vision, and additional insurance options.
  • 401(k) / Retirement Benefits – Helping you build long-term financial security.
  • Generous PTO & Paid Holidays – Supporting a healthy work-life balance.
  • Professional Development – Support for continued education, certifications, and PE licensure.
  • Career Advancement – Clear opportunities to grow into Senior Engineer, Project Manager, or leadership roles.
  • Collaborative Culture – Work alongside experienced professionals in a supportive, team-oriented environment.
  • Diverse & Challenging Projects – Gain exposure to innovative designs across multiple industries.
  • Long-Term Stability – Join an established organization with a strong reputation and continued growth.

Why Consider This Opportunity?

This is more than just another design position. It's an opportunity to join a company that values technical excellence, employee development, and long-term relationships. You'll have the ability to make a meaningful impact on projects while continuing to advance your engineering career.

If you're an experienced Mechanical or Plumbing Design Engineer looking for better opportunities, challenging projects, competitive compensation, and a company that genuinely invests in its people, let's connect!

All inquiries will be handled confidentially.

Jennifer Waggoner
Sr. Search Consultant | gpac
605-370-5534
Jennifer.Waggoner@gogpac.com

All qualified applicants will receive consideration without regard to race, age, color, sex (including pregnancy), religion, national origin, disability, sexual orientation, gender identity, marital status, military status, genetic information, or any other status protected by applicable laws or regulations. GPAC (Growing People and Companies) is an award-winning search firm specializing in placing quality professionals within multiple industries across the United States since 1990. We are extremely competitive, client-focused and realize that our value is in our ability to deliver the right solutions at the right time.

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