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Business Details
50+ Years
experience
Trusted Engineering Solutions Since 1911
Founded in 1911, James Posey Associates has built a century-long reputation as a leader in mechanical, electrical, and plumbing engineering design. Our firm combines deep technical expertise with collaborative problem-solving to deliver innovative solutions for complex building systems. With a focus on education, government, healthcare, and cultural facilities, we prioritize client needs while maintaining rigorous quality standards. Our team of seasoned engineers specializes in sustainable design, commissioning, and specialized systems integration, serving the mid-Atlantic region from our Baltimore headquarters.

Through generations of leadership, we've maintained our founding principles of client service, staff development, and technical excellence while embracing evolving technologies like BIM and energy modeling. Our extensive experience with historic preservation and mission-critical facilities demonstrates our ability to balance modern functionality with architectural integrity. As a 100% employee-owned firm, we remain committed to advancing engineering excellence through continuous innovation and mentorship.
Services
Commissioning Services Building Energy Modeling Photovoltaic Design Pipe Stress Analysis Daylighting Analysis Life-Cycle Cost Analysis Geothermal Heat Exchange Medical Gas Systems Clean Room Design Historic Preservation
Details
  • Year established: 1911
Highlights and features
  • We offer over a century of engineering expertise in specialized building systems
  • Our team holds deep experience in historic preservation and sustainable design
  • We maintain in-house commissioning specialists for comprehensive project oversight
  • Our engineers utilize advanced technologies like BIM and energy modeling
  • We prioritize client collaboration through transparent communication processes
Services
Commissioning Services
Our commissioning team ensures optimal building system performance through comprehensive testing and verification. We provide full lifecycle support from design inception to post-occupancy evaluation, specializing in LEED certification documentation and energy benchmarking. Our engineers utilize advanced diagnostic tools to validate MEP systems in both new construction and existing facilities.
Building Energy Modeling
We employ sophisticated software platforms to analyze building energy performance and optimize system efficiency. Our energy modeling services support net-zero design goals and code compliance verification. The team conducts daylighting studies and life-cycle cost analyses to inform sustainable design decisions for commercial and institutional clients.
Geothermal Heat Exchange
Our engineers design high-efficiency geothermal heating and cooling systems tailored to site-specific conditions. We integrate ground-source heat pump technology with building automation systems to reduce energy consumption while maintaining occupant comfort. The designs comply with ASHRAE standards and local code requirements.
Historic Preservation
We specialize in modernizing MEP systems within historic structures while preserving architectural integrity. Our approach combines 3D laser scanning with traditional engineering principles to retrofit aging buildings with contemporary mechanical, electrical, and plumbing infrastructure without compromising historical elements.
Clean Room Design
Our team designs specialized HVAC systems for controlled environments requiring strict contamination control. We engineer solutions for pharmaceutical, biotech, and research facilities that maintain ISO-certified cleanliness standards while optimizing energy efficiency and system maintainability for mission-critical operations.
People
Kevin McCarthy
President
With over 25 years of engineering experience, Kevin leads the firm's strategic direction while maintaining active involvement in complex commissioning projects. He specializes in federal facility modernization and sustainable design implementation.
Stephen Sattler
Marketing Director
Stephen oversees business development and client relations, leveraging his 15+ years of industry experience to connect engineering expertise with client needs. He manages the firm's outreach initiatives and professional affiliations.
Questions
What engineering services does James Posey Associates offer?
We provide mechanical, electrical, plumbing, and fire protection engineering services, along with commissioning, energy modeling, and specialized systems design for diverse building types.
What market sectors does the firm specialize in?
Our primary focus areas include education, government, healthcare, cultural institutions, and mission-critical facilities across the mid-Atlantic region.
Does the firm handle historic building renovations?
Yes, we specialize in modernizing MEP systems within historic structures while preserving architectural integrity through 3D laser scanning and traditional engineering methods.
How does the firm approach sustainable design?
We integrate energy modeling, daylighting analysis, and geothermal systems into projects to achieve high-performance buildings that meet LEED and net-zero standards.
What commissioning services are available?
Our comprehensive commissioning services cover design review, functional testing, BAS verification, and LEED documentation for new and existing building systems.