Fellenzer Engineering

What Fellenzer Engineering does

Fellenzer Engineering LLP is a multi-disciplinary professional engineering consulting firm founded circa 1950 and headquartered at 22 Mulberry Street in Middletown, New York, with a regional office in Poughkeepsie, NY. The firm delivers engineering consultation, analysis, and design services across eight core disciplines: electrical power and lighting design, HVAC and mechanical systems, plumbing, site/civil and land development, life safety (fire detection and suppression), energy management and LEED-certified design, engineering analysis and studies including expert testimony, and construction administration. Its technical scope spans boiler and chiller plants, geothermal heating, emergency/standby power, UPS systems, fire sprinkler and detection systems, and storm water management, delivered as human-expert deliverables (CAD drawings, technical studies, design specifications) with no software or digital platform component.

The firm operates a traditional project-based professional services model, billing quote-driven engagements to enterprise and institutional clients. It is licensed to practice Professional Engineering in eight states (NY, PA, CT, MA, NJ, RI, VT, FL) and serves clients from Pennsylvania to Connecticut and Albany to Central New Jersey. Notable customers include Giants Stadium, Newark International Airport, the New York State Dormitory Authority and Office of General Services, the US Postal Service, the Department of Veterans Affairs, multiple SUNY campuses (Orange, New Paltz, Albany), Marist College, the Culinary Institute of America, Mount St. Mary's University, Pizzagalli Construction Company, and a cluster of Hudson Valley hospitals (Bon Secours Community Hospital, Horton Medical Center, Tuxedo Memorial Hospital, St. Joseph's Medical Center).

The firm is privately held by two partners, John D. Fellenzer (BS Mechanical Engineering, RPI; MBA, Marist College) and Mark D. Fellenzer (BS Electrical Engineering and MS Computer and Systems Engineering, RPI; LEED Accredited Professional). There is no disclosed institutional investment, venture capital, private equity, M&A activity, or parent company. The company has been recognized with industry awards including the 2002 NYS National Society of Professional Engineers "Best Electrical Design" award, an AIA Historic Preservation award, multiple "Best New Commercial Building" awards from the Orange County Realtors Association (1993, 1994), and a Build New York Award (1995). Fellenzer Engineering LLP's competitive position rests on licensed credentials, multi-decade institutional relationships, term-contract incumbency with government buyers, and a demonstrated portfolio across high-profile commercial, government, healthcare, and education facilities.

Name

Fellenzer Engineering

Legal name

Fellenzer Engineering LLP

Website

https://fellp.com

Company type

Private

Founded year

1950

Operating status

Operating

Headcount range

11–50 employees

Short description

Fellenzer Engineering LLP is a multi-disciplinary engineering consulting firm providing mechanical, electrical, plumbing, fire protection, site/civil, LEED, and construction administration services to government, healthcare, educational, and commercial clients across the Mid-Hudson and Northeast Corridor.

Ownership category

akta.pro rank

Product category

Engineering Consulting Services

NAICS

Engineering Services (54133)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

Systems Engineering & Technical Program Management (BPAHAIAI)

Keywords

• Mechanical engineering design
• Electrical engineering services
• HVAC system design
• Fire protection engineering
• Building systems consulting

Headquarters

HQ city

Middletown

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Infrastructure

Revenue model

1. Engineering Consulting and Design Services: Project-based professional engineering services for mechanical and electrical systems, including technical studies, project programming, reports, and detailed designs. Also provides construction administration services through project completion.

Go-to-market motion1 record

Distribution channels1 record

Core offering

Fellenzer Engineering LLP is a multi-disciplinary professional engineering firm that provides mechanical and electrical engineering consulting, analysis, and design services for commercial, institutional, healthcare, government, and educational facilities. Offerings cover HVAC, electrical power distribution, plumbing, fire protection/life safety, site/civil, and LEED/energy management design, along with construction administration and expert testimony for engineering litigation.

Product overview

Fellenzer Engineering LLP is a multi-disciplinary professional engineering firm offering a comprehensive suite of engineering consulting services for mechanical and electrical systems. The firm provides eight core service offerings: Electrical Design Services (power supply, distribution, lighting, emergency power, UPS systems), HVAC Design Services (boiler/chiller plants, geothermal systems), Plumbing Design Services, Site/Civil and Land Development Services, Life Safety Design Services (fire detection, sprinkler systems), Energy Management/LEED Services, Engineering Analysis and Studies Services (including expert testimony), and Construction Administration Services. These services are delivered as professional consulting engagements for commercial, institutional, industrial, and residential clients throughout the Hudson Valley region and licensed states.

Differentiator

Problem solved

Functional benefit

Products and services

• Electrical Design Services
• HVAC Design Services
• Plumbing Design Services
• Site/Civil and Land Development Services

Quantifiable outcome

• 82,000 square foot Sakac Hall Dormitory designed with outstanding quality recognition
• +1 more outcomes

Named customers24 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Scale indicators4 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• Syska Hennessy Group: MEP and technology systems consulting firm providing mechanical, electrical, plumbing, fire protection, and energy engineering design - directly comparable service mix to Fellenzer but at significantly larger scale with national offices.
• Vanderweil Engineers: Privately held MEP engineering firm serving institutional, healthcare, and higher-education clients across the Northeast - closely comparable in service portfolio and client verticals to Fellenzer.
• AHA Consulting Engineers: Mid-sized MEP engineering consulting firm focused on high-performance building design, sustainability, and life safety for institutional owners - comparable in capability mix including LEED/sustainability.
• Bard, Rao + Athanas Consulting Engineers: MEP engineering consultancy serving commercial, institutional, and government clients with multi-state licensure - aligned with Fellenzer in service offering and Northeast delivery footprint.
• Robert Derector Associates: MEP/FP consulting engineering firm with deep expertise in healthcare, higher education, and government facilities in the Northeast - directly comparable project-type focus to Fellenzer.
• AKF Group: Mid-Atlantic based MEP/FP and technology engineering consulting firm serving institutional, healthcare, and commercial clients - directly comparable in service mix and project-type focus.
• Kohler Ronan LLC: New York-based MEP consulting engineering firm serving commercial, institutional, healthcare, and government clients in the Northeast - direct regional peer with similar mid-sized firm profile.

Broad incumbents

• Stantec: Global design and engineering firm with a large Buildings practice covering mechanical, electrical, plumbing, fire protection, and energy services - same core service categories with far broader geographic and bench scale.
• Tetra Tech: Large engineering and consulting firm with building/energy practices including MEP design, sustainability consulting, and federal/state government contract execution - a scaled competitor for the same public-sector work.
• WSP USA: Global engineering services firm with substantial building MEP and life-safety practices across all 50 states - same building engineering categories but at vastly larger scale; competes for the same government and institutional RFPs.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/profile.php
• LinkedInlinkedin.com/company/fellenzer-engineering-llp

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Fellenzer Engineering