Harrison-Hamnett

What Harrison-Hamnett does

Harrison-Hamnett, P.C. is a privately held professional corporation headquartered at 40 Knowles Street, Pennington, New Jersey, that has provided consulting structural engineering services since its founding in 1989. The firm specializes in structural engineering design for building structures, with core work spanning new construction and additions to existing buildings across educational, institutional, commercial, industrial, municipal, religious, and residential categories. It maintains an extensive practice in the assessment of historic and older structures, including structural design and detailing for restoration and renovation projects — a niche that requires specialized expertise accumulated over decades.

The firm operates as a single-service professional services consultancy, generating revenue through project-based fees rather than disclosed product or subscription pricing. Its core technology is conventional structural engineering design and analysis delivered by a small team (estimated 11-50 employees) led by co-founders John Harrison (President) and Don Hamnett. No proprietary software, platforms, patents, or technology assets are disclosed.

Harrison-Hamnett's primary client base is architectural firms, with a secondary segment of developers, owners, and construction firms. Client acquisition is relationship-based and sales-led, relying on direct professional engagement rather than digital marketing or self-serve channels. The company is independently owned with no disclosed external investment, no parent company, no subsidiaries, no M&A activity, and no funding history. Its operating footprint is regional, concentrated in New Jersey.

Name

Harrison-Hamnett

Legal name

Harrison-Hamnett, P.C.

Website

https://hhpccse.com

Company type

Private

Founded year

1989

Operating status

Operating

Headcount range

11–50 employees

Short description

Harrison-Hamnett, P.C. is a Pennington, New Jersey-based consulting structural engineering firm, founded in 1989, that provides structural design services for new construction, additions, and historic structure restoration to architects, developers, owners, and construction firms.

Ownership category

akta.pro rank

Product category

Structural Engineering Services

NAICS

Architectural Services (541310), Residential Remodelers (236118)

akta.pro primary industry

Office & Corporate Building Construction (IMAFACAA)

akta.pro secondary industries

Architectural Reconfiguration & Structural Alterations (HSAPAEAB), Custom Home Building (IMAFABAC)

Keywords

• Structural engineering design
• Consulting engineers
• Building structures
• Historic structure restoration
• Construction engineering

Headquarters

HQ city

Pennington

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D

Revenue model

1. Structural Engineering Design Services: Professional services revenue generated through structural engineering design consulting for building construction projects, including new construction and renovation/restoration work for various building types.

Go-to-market motion1 record

Distribution channels1 record

Core offering

Harrison-Hamnett, P.C. provides structural engineering design services for building structures, including structural analysis, design, and detailing for new construction and additions to existing buildings. The firm also offers assessment and structural design/detailing for the restoration and renovation of historic and older structures across educational, institutional, commercial, industrial, municipal, religious, and residential building types.

Product overview

Harrison-Hamnett, P.C. is a consulting structural engineering firm that provides structural engineering design services for building structures. The company operates as a single-service firm offering structural design consultations primarily to architects, with additional clients including developers, owners, and construction firms. Services span new construction structural design, additions to existing buildings, and historic structure restoration and renovation work across educational, institutional, commercial, industrial, municipal, religious, and residential building types.

Differentiator

Problem solved

Functional benefit

Products and services

• Structural Engineering Design Services

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Scale indicators1 record

Recent moves1 record

Direct peers

• Severud Associates: A New York-based structural engineering consulting firm of comparable size and scope to Harrison-Hamnett, providing structural design for new construction, renovations, and adaptive reuse across commercial, institutional, and residential buildings.
• DeSimone Consulting Engineers: A structural engineering firm providing design and analysis services for new construction, renovation, and adaptive reuse across building types — a closely comparable peer in services and client base.
• CVM Engineers: A regional structural engineering firm providing design services for building structures including renovations and additions — a closely matched peer in scope, size, and project type.
• Wiss, Janney, Elstner Associates (WJE): A national structural engineering consultancy with a particularly strong historic structure assessment and restoration practice — directly overlapping with HH's distinctive specialty in older and historic buildings.
• Gilsanz Murray Steficek: A mid-size structural engineering firm in the New York metro area with a comparable portfolio of new construction and renovation work for commercial, institutional, and residential clients.

Broad incumbents

• Simpson Gumpertz & Heger (SGH): A national engineering firm with a structural design and building renovation practice, comparable in service mix to HH but with broader geography, larger headcount, and additional disciplines.
• WSP: A global professional services firm with a large buildings structural engineering practice, operating at a scale and breadth far beyond HH but competing for many of the same commercial and institutional projects.
• AECOM: A global, multi-discipline engineering and architecture firm that competes in structural design for buildings as part of a much wider portfolio; represents the large-incumbent end of the market.
• Stantec: A multi-discipline engineering, architecture, and environmental services firm with a buildings practice that includes structural design for commercial, institutional, and residential projects — a broad incumbent peer.
• Thornton Tomasetti: A large, global structural engineering firm operating broadly in building design, preservation, and forensics; competes with HH on building projects but at materially greater scale and geographic reach.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks5 records

Key highlights5 records

Customer concentration

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 Harrison-Hamnett