Business Details
30 Years
experience
Your Trusted MEP/FP Engineering Partner in Portsmouth, NH
Founded in 1996, CSI Engineering has evolved from a mechanical coordination firm to a full-service MEP/FP engineering design company serving New England and beyond. Our three principal engineers, with combined experience exceeding 100 years, lead every project directly, ensuring technical excellence and personalized service. We specialize in mechanical, electrical, plumbing, and fire protection engineering for diverse sectors including historic buildings, healthcare facilities, and commercial spaces. Our team holds industry certifications and maintains memberships in national engineering organizations, enabling us to deliver code-compliant, innovative solutions. We prioritize client relationships, offering tailored designs that balance budget constraints with real-world buildability. With offices in Portsmouth, NH, we serve clients across the U.S. and internationally, combining local expertise with global capabilities. Our commitment to quality is evidenced by long-standing client partnerships and industry recognition in MEP engineering.
Services
HVAC Design
Electrical Design
Plumbing Design
Fire Protection Design
LEED Consulting
Details
- Year established: 1996
Highlights and features
- Three principal engineers with 100+ combined years of direct project involvement
- Specialized expertise in historic building MEP systems
- Custom designs meeting exact code and operational requirements
- On-site evaluations for repairs and system upgrades
- National engineering organization memberships ensuring code compliance
Associations and certifications
- LEED
What people say
Great team
Deliver on time
Responsive consultants
Services
HVAC Design
Our HVAC design services create energy-efficient heating, ventilation, and air conditioning systems for commercial and residential buildings. We specialize in clean room environments, laboratory ventilation, and historic structure retrofits while ensuring compliance with current mechanical codes. Our engineers optimize ductwork layouts and equipment selection to balance comfort with operational efficiency.
Electrical Design
We provide comprehensive electrical design solutions including power distribution, emergency lighting, and EV charging infrastructure. Our team specializes in complex systems for arenas, theaters, and medical facilities while maintaining strict adherence to NEC and local code requirements. We integrate energy-efficient lighting and security systems to meet modern building standards.
Plumbing Design
Our plumbing engineering covers domestic water systems, medical gas piping, and industrial waste management. We design code-compliant systems for commercial kitchens, laboratories, and healthcare facilities while incorporating water conservation strategies. Our team optimizes piping layouts for ease of maintenance and long-term reliability.
Fire Protection Design
We engineer fire suppression and alarm systems tailored to each facility's needs, including specialized systems for computer rooms and aircraft hangars. Our designs meet NFPA standards while integrating with existing building infrastructure. We provide hydraulic calculations and code analysis for new and renovated structures.
LEED Consulting
As LEED-accredited professionals, we guide clients through sustainable design strategies and certification processes. Our services include energy modeling, water efficiency analysis, and material selection to achieve desired certification levels. We help buildings reduce environmental impact while improving occupant wellness and operational efficiency.
People
John E. Cass
Principal and Founder
With 39 years of HVAC engineering experience, John leads mechanical design projects and mentors junior staff. He graduated from Wentworth Institute of Technology with a BSME and maintains active PE licenses in multiple states.
Jim O'Brien
Principal, Chief Electrical Engineer
Jim brings 35 years of electrical engineering expertise, specializing in complex power systems and LEED-certified projects. He holds a Master Electrician license and oversees all electrical design work at CSI Engineering.
Jason Churches
Principal, Mechanical Engineer
Jason has 16 years of mechanical design experience and is licensed in ME, MA, and NH. He specializes in commercial HVAC systems and coordinates multidisciplinary engineering efforts for large-scale projects.
Domenic Ciolino
Fire Protection Engineer
With 23 years of fire protection experience, Domenic designs specialized suppression systems for high-risk facilities. He graduated from UMASS Lowell with a civil engineering degree and focuses on code-compliant fire safety solutions.
Eric Pflugradt
Plumbing Designer
Eric has 26+ years of plumbing design experience, specializing in commercial and institutional systems. He graduated from the University of Maine with an agricultural engineering degree and focuses on water conservation strategies.
Questions
What engineering services do you offer?
We provide mechanical, electrical, plumbing, and fire protection engineering design services for commercial, residential, and historic buildings.
Do you work outside New England?
While based in Portsmouth, NH, we complete projects nationwide and internationally, with experience across all 50 states.
How do you handle historic building projects?
Our engineers specialize in preserving historic integrity while implementing modern MEP systems that meet current codes and efficiency standards.
Can you assist with LEED certification?
Yes, we offer LEED consulting services including energy modeling, water efficiency analysis, and sustainable design strategies.
How do I request engineering services?
Contact us through our website or call 603.319.8244 to discuss your project requirements with our engineering team.