Mechanical Engineer - MEP / HVAC Design

FSB is a full-service Architecture and Engineering firm in Oklahoma City, OK (OKC), built on nearly 80 years of design excellence, technical innovation, and community impact. We're seeking Mechanical Engineers, MEP Engineers, and Mechanical Design Engineers who are passionate about HVAC design, plumbing systems, building systems, energy modeling, Revit documentation, and integrated project delivery.

We're growing and currently seeking Mechanical Engineers at multiple levels - from entry-level to senior leaders - to join our collaborative engineering team. Whether you're just starting out, growing into project leadership, or bringing years of expertise to guide complex projects, FSB offers the opportunity to work across a wide spectrum of projects that matter.

What sets us apart is our deep commitment to cross-discipline collaboration. At FSB, engineers work shoulder to shoulder with architects, interior designers, and technical experts to shape solutions that are both innovative and buildable.

If you're passionate about engineering that serves people and community - and you're ready to grow with a team that values both purpose and performance - we invite you to apply.

Responsibilities

• Design and document MEP mechanical systems including HVAC systems, plumbing systems, building automation systems, and temperature controls for aviation, education, civic, tribal, commercial, and federal facilities.
• Produce Revit models, construction documents, drawings, specifications, diagrams, 3D models, and reports that align with project goals.
• Perform mechanical engineering calculations, including heating and cooling load analysis, energy modeling, ventilation calculations, equipment sizing, and system selection.
• Apply building codes, ASHRAE standards, and industry guidelines to ensure functional, compliant solutions.
• Participate in client meetings, design reviews, and team coordination efforts.
• Collaborate with architects, engineers, consultants, and internal teams to deliver integrated outcomes.
• Support QA/QC, construction administration, submittal reviews, RFIs, field observations, and coordination with contractors and owners.
• Lead project documentation and mentor junior staff (mid- and senior-level roles).

Skills & Attributes

• Strong communication and collaboration skills across disciplines and with clients.
• Critical thinking and creativity in solving complex design challenges.
• Time management and adaptability in a fast-paced, multi-project environment.
• Mentorship mindset, with a willingness to guide and support junior team members.
• Clear, professional writing and verbal communication skills.
• Initiative in identifying solutions and improving workflow efficiencies.

Qualifications

• Entry-Level / EIT: Bachelor's or Master's degree in Mechanical Engineering or a closely related engineering field, Engineer in Training / EIT certification, FE exam passed, 0-2 years of experience.
• Mid-Level: Bachelor's or Master's degree in Mechanical Engineering, FE exam passed and actively pursuing Professional Engineer / PE licensure, 5+ years of progressive experience, demonstrated ability to lead design efforts and coordinate small to mid-scale projects.
• Senior Engineer: Bachelor's or Master's degree in Mechanical Engineering, active Professional Engineer / PE license, 10+ years of progressive experience leading mechanical design.
• Proficiency in Revit required; experience with AutoCAD, BIM coordination, HVAC load calculation software, energy modeling tools, and Microsoft Office is a plus.
• Strong understanding of mechanical building systems, MEP documentation, interdisciplinary coordination, building codes, ASHRAE standards, and construction administration.
• Experience in consulting engineering, architecture and engineering, or building systems design for aviation, civic, commercial, tribal, mission critical, or federal work is highly valued.

At FSB Architects + Engineers, we believe great design comes from great teams. Whether you're an engineer just starting your journey or a seasoned professional, we welcome your expertise and passion.

Join our inclusive community of architects, engineers, and creatives - and help us shape environments that serve people, inspire progress, and stand the test of time.

Relevant Skills & Experience: Mechanical Engineering, MEP Design, HVAC Design, Plumbing Systems, Building Systems, Revit, BIM, Energy Modeling, Load Calculations, ASHRAE, Construction Documents, QA/QC, Construction Administration, PE, EIT, Oklahoma City.