What Trinity Engineering does

Trinity Engineering Inc. is a privately held custom fabrication company headquartered at 583 Martin Ave., Rohnert Park, California, founded in 1980 by Bruce Omholt (originally in Grand Rapids, Michigan, relocated in 1981). The firm operates as a single-source provider of dynamic commercial millwork packages, high-end custom store fixtures, and design-build projects, integrating multiple fabrication disciplines (woodworking, metal work, glass, laminates, veneers, acrylic, solid surfaces, and formulated resins) under one roof alongside on-site sand blasting, professional spray booth finishing, and full-scale pre-shipment assembly. Its four service modules (Design Engineering, Fabrication & Manufacturing, Prototype Development, and Delivery & Installation) support six project categories: wineries, restaurants, hotels, retail, offices, and luxury residences, with named enterprise customers including Clinique, Shiseido, Ben & Jerry's, Vineyard 29, La Crema, Swatch, Prints Plus, and the Huntington Library.

The company's business model is project-based and quote-driven, with pricing determined by project specifications, materials, complexity, and scale rather than standardized tiers. It generates revenue through one-off custom fabrication engagements spanning prototype development through installation, delivered either via its own freight and installation crews for regional jobs or via custom crating and third-party shipping for national and international projects in the United States, Canada, and Mexico. The go-to-market motion is enterprise field sales driven by direct contact-form inquiries, a project portfolio website, and referral/repeat business, with no disclosed sales team structure or marketing spend.

Trinity Engineering has operated continuously for over 45 years under independent, founder-originated ownership with no disclosed private equity, venture capital, or institutional investment. It has been recognized among North Bay's Top 500 Businesses and maintains US Green Building Council membership with LEED-registered low-VOC finishes and a 90% production-waste recycling rate, positioning it for sustainability-mandated commercial work. The company remains privately held with no public ticker, no funding rounds, no M&A history, and no disclosed headcount, limiting financial visibility for outside investors.

Name

Trinity Engineering

Legal name

Trinity Engineering Inc.

Website

https://trinityengineering.com

Company type

Private

Founded year

1980

Operating status

Operating

Short description

Trinity Engineering is a privately held, 45-year-old custom fabrication company in Rohnert Park, California that designs, engineers, manufactures, and installs commercial millwork, store fixtures, and design-build projects for wineries, restaurants, hotels, retail, offices, and luxury residences across the US, Canada, and Mexico.

Ownership category

akta.pro rank

Headquarters

HQ city

Rohnert Park

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Supply Chain, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Custom Fabrication Projects: Project-based revenue from design, fabrication, and installation of custom millwork, store fixtures, casework, cabinetry, and design-build projects. Services include prototype development, fabrication, manufacturing, design engineering, delivery and installation.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Trinity Engineering is a custom fabrication company that designs, engineers, fabricates, and installs custom millwork, store fixtures, casework, and cabinetry. Operating from a large production facility in Rohnert Park, California, the company delivers design-build projects for retail, winery, restaurant, hotel, office, and luxury residential clients across the United States, Canada, and Mexico.

Product overview

Trinity Engineering is a custom fabrication company offering a single-source solution for dynamic commercial millwork packages, high-end custom store fixtures, and unique design-build projects. The core product portfolio centers on Custom Millwork Packages, Custom Store Fixtures (including casework and cabinetry), and Design-Build Projects. These products are supported by four integrated service modules: Design Engineering Services, Fabrication & Manufacturing Services, Prototype Development Services, and Delivery & Installation Services. The company operates across six project categories: Wineries, Restaurants, Hotels, Retail, Offices, and Residences, serving clients throughout the United States, Canada, and Mexico.

Differentiator

Problem solved

Functional benefit

Products and services

• Custom Millwork Packages Bespoke millwork packages including casework, cabinetry, and architectural woodwork fabricated to client specifications for commercial and residential interiors.
• Custom Store Fixtures Custom-designed store fixtures produced for retail brands, including displays, counters, and branded retail environments.
• Design-Build Projects Full-scope design-build project delivery that combines design, engineering, fabrication, and installation under a single contract for retail, winery, restaurant, hotel, office, and luxury residential clients.
• Design Engineering Services In-house design engineering support that transforms client concepts into detailed fabrication drawings and specifications.
• Fabrication and Manufacturing Services Multi-discipline production fabrication of millwork and fixtures in a large Rohnert Park facility equipped with sand blasting booth, professional spray booth, and full-scale assembly capabilities, including LEED-registered finishes.
• Prototype Development Prototype development service that produces working samples of custom fixtures and millwork prior to full production runs.
• Delivery and Installation Services Direct delivery and on-site installation of fabricated millwork and fixtures using the company's own fleet, serving projects throughout the US, Canada, and Mexico.

Named customers9 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Scale indicators4 records

Recent moves5 records

Expansion highlights5 records

Broad incumbents

• MasterBrand Cabinets: One of North America's largest cabinet manufacturers serving new construction, remodeling, and commercial projects. A broad incumbent that competes on volume, dealer networks, and standardized SKUs — different model than Trinity's custom fabrication focus.
• Woodgrain Millwork: Large-scale millwork and door manufacturer serving national home centers, distributors, and commercial customers. A broader incumbent that competes on scale and distribution rather than the bespoke, single-source model Trinity operates.

Direct peers

• Wood-Mode: Custom cabinetry and millwork manufacturer serving residential and light commercial markets with bespoke finishes and materials. Comparable to Trinity's custom millwork practice, particularly in luxury residential applications.
• Crown Point Cabinetry: Custom cabinetry manufacturer producing high-end semi-custom cabinetry for residential and select commercial projects. Comparable to Trinity's luxury residential millwork practice and custom cabinetry offerings.
• Eggers Industries: Architectural millwork and custom woodwork manufacturer serving commercial, institutional, and luxury residential markets. Comparable in scope to Trinity's millwork packages and design-build offerings, with multi-discipline fabrication capability.
• Wind Mill Woodworking: Custom millwork and store fixture fabricator serving retail and hospitality clients. Directly comparable to Trinity in product category, materials breadth, and project-based commercial delivery.
• Displaycraft Inc. Custom retail display and fixture manufacturer serving cosmetics, fashion, and specialty retail brands. Closely comparable to Trinity's custom store fixture practice, with similar enterprise brand customers and project-based delivery model.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/trinityengineer
• Facebookfacebook.com/TrinityEngr

Revenue estimate

Valuation estimate

Number of profiles

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 Trinity Engineering