What WCD & Associates does

WCD & Associates is a privately held structural engineering consultancy headquartered in Rocklin, California. The firm, founded in 2021 (previously operating as Cullumber Engineering and Design) by Wesley Cullumber, PE, operates three service lines: transportation and bridge design for public-sector clients, commercial structural engineering for national retail and restaurant tenants, and residential structural engineering for custom homes, remodels, and multi-unit developments. Its technical deliverable is stamped engineering work — independent bridge design checks, NBIS bridge inspections, retaining and sound wall design, tenant improvements, self-storage buildings, tilt-up concrete offices, and residential framing — performed by a staff that includes licensed Professional Engineers and a Structural Engineer.

The firm is a registered Disadvantaged Business Enterprise (DBE) and minority-owned business, a regulatory status it leverages to access set-aside transportation and infrastructure contracts. Named government clients include Caltrans, Louisiana DOT, the Golden Gate Bridge District, and a roster of California county and city jurisdictions (Placer, Sacramento, Los Angeles, Napa, Alameda, Santa Clara, Fresno, San Jose, Santa Cruz, Ceres, Folsom, Sacramento). Named commercial clients include McDonald's, Starbucks, Jack-in-the-Box, Raising Cane's, and SuperStar Car Wash. The firm holds engineering licensure in 25 US states, materially broadening its addressable market beyond its California base.

The business model is project-based professional services billing under a sales-led, referral-driven go-to-market with no external institutional capital. Pricing is quote-based on project scope and complexity rather than published rates. The team of approximately 14 includes founder/CEO Wesley Cullumber, Vice President and COO Collin Dilworth, additional licensed PEs (Pattie Clawson, Kyle Kaschmitter), EIT engineers, CAD technicians, an office manager, a growth manager, and a billing admin. Per company self-report, growth is 100% organic and sourced purely through referrals and the quality of work delivered, with no paid marketing, no M&A activity, and no external funding disclosed.

Name

WCD & Associates

Legal name

WCD & Associates

Website

https://wcdassociates.com

Company type

Private

Founded year

2021

Operating status

Operating

Headcount range

1–10 employees

Short description

WCD & Associates is a Rocklin, California-based DBE-certified structural engineering firm founded in 2021, delivering transportation/bridge design for government clients alongside commercial tenant-improvement and residential structural engineering across 25 US states.

Ownership category

akta.pro rank

Product category

Structural Engineering Services

NAICS

Engineering Services (54133), Architectural, Engineering, and Related Services (5413)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

Civil & Structural Engineering Consulting (BPAHAIAA)

Keywords

• Structural engineering services
• Bridge design services
• Commercial structural engineering
• Residential structural design
• Transportation infrastructure engineering

Headquarters

HQ city

Rocklin

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, Marketing or Sales

Revenue model

1. Structural Engineering Consulting Services: Professional engineering services for transportation/bridge projects, commercial construction, and residential projects. Revenue generated through project-based consulting engagements with government agencies, municipalities, and private sector clients.

Go-to-market motion1 record

Distribution channels1 record

Core offering

WCD & Associates is a structural engineering firm offering three primary service lines: transportation and bridge design (independent bridge design checks, NBIS inspections, retaining/sound walls, maintenance facilities), commercial structural engineering (tenant improvements for QSR chains, self-storage buildings, tilt-up concrete offices, and specialty structures), and residential structural engineering (custom homes, remodels, multifamily balcony repairs, multi-unit townhome developments). The firm operates as a registered DBE (Disadvantaged Business Enterprise) and minority-owned business, serving government agencies, municipalities, and private developers primarily across California.

Product overview

WCD & Associates is a structural engineering firm that offers a unified portfolio of engineering services rather than a software platform. The company operates across three primary service lines: Transportation & Bridge Design Services (including bridge inspections NBIS, independent design checks, retaining walls, and maintenance facilities), Commercial Structural Engineering (tenant improvements, self-storage, restaurants, tilt-up concrete buildings), and Residential Structural Engineering (custom homes, remodels, multifamily repairs). Projects like the Peabody Road Overhead Train Station showcase their bridge design capabilities. The firm was previously known as Cullumber Engineering and Design and was founded in 2021.

Differentiator

Problem solved

Functional benefit

Products and services

• Transportation & Bridge Design Services Provides transportation and bridge design services for government agencies and municipalities, including independent bridge design checks, quantities and estimates (BDA), NBIS bridge inspections, retaining and sound wall designs, and maintenance facilities (concrete, CMU, steel). Served clients include Caltrans, Louisiana DOT, Golden Gate Bridge District, and multiple California counties and cities.
• Commercial Structural Engineering Provides commercial structural engineering for tenant improvements and new construction, including QSR restaurant builds for McDonald's, Starbucks, Jack-in-the-Box, Raising Cane's, SuperStar Car Wash, plus 100,000+ sq.ft. self-storage buildings, metal stairs/guardrails, grow facilities, tower conveyors, elevated pools, water tanks, and tilt-up concrete office buildings.
• Residential Structural Engineering Provides residential structural engineering for custom homes, remodels/rebuilds, multifamily balcony and guardrail repairs, spec homes, and multi-unit townhome developments. Thousands of unique residential designs completed, supported by team members with real-world in-field residential construction experience.

Quantifiable outcome

• 100% organic growth through referrals

Named customers17 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Four partnerships are on record, tiered core.

• California County Jurisdictions (Placer, Sacramento, Los Angeles, Napa, Alameda)coreStrategic or Co-development PartnerWCD has established working relationships with multiple county and city jurisdictions across California, enabling them to gain a firm understanding of requirements needed to see projects through to completion. These jurisdictions include Placer, Sacramento, Los Angeles, Napa, and Alameda counties among others.
• California Municipal Jurisdictions (Fresno, San Jose, Santa Cruz, Ceres)coreStrategic or Co-development PartnerWCD has worked with various city jurisdictions in California including Fresno, San Jose, Santa Cruz, and Ceres, providing municipal engineering services for transportation and infrastructure projects.
• CaltranscoreStrategic or Co-development PartnerAs a registered DBE, WCD provides transportation and bridge design services in partnership with Caltrans for California state transportation infrastructure projects including the Peabody Road Overhead Train Station.
• Golden Gate Bridge DistrictcoreStrategic or Co-development PartnerWCD provides transportation infrastructure engineering services for the Golden Gate Bridge District, supporting bridge design and related structural engineering projects.

Scale indicators3 records

Recent moves7 records

Expansion highlights4 records

Broad incumbents

• AECOM: A global infrastructure consulting firm with major bridge, transportation, and buildings practices — competes with WCD on California transportation and large commercial projects, offering broader program management and design-build capabilities.
• HDR: A global engineering and architecture firm with one of the largest U.S. bridge and transportation design practices — directly competes with WCD for Caltrans and municipal transportation work but at vastly greater scale and service breadth.
• WSP: A global engineering consultancy with a large U.S. transportation and bridges practice that competes with WCD for Caltrans, county, and municipal work as both prime and sub-consultant.

Direct peers

• Hope-Amundson Engineering: A regional structural engineering consultancy focused on transportation, bridge, and commercial structural design — comparable to WCD's government and infrastructure mix.
• Datum Engineering: A regional structural engineering firm delivering bridge, commercial, and residential structural design services with a comparable PE-led delivery model.
• DCI Engineers: A multi-office structural engineering consulting firm serving commercial, residential, and civic building markets with a comparable project mix and PE/SE-led delivery model.
• Simpson Gumpertz & Heger: A national structural engineering and applied science firm that designs and investigates bridges, buildings, and infrastructure — directly comparable in technical scope, though at significantly greater scale.
• Martin/Martin Consulting Engineers: A multi-state structural engineering firm providing bridge, transportation, commercial, and residential structural design — directly comparable in service mix and customer base to WCD.
• KPFF Consulting Engineers: A national structural and civil engineering consulting firm that delivers bridge, transportation, commercial, and residential structural engineering — directly overlapping WCD's three service lines and comparable delivery model.
• Coughlin Porter Lundeen: A Pacific Northwest structural and civil engineering firm providing bridge, commercial, and residential structural design — closely comparable service portfolio and public-sector exposure.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/wcd-associates

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 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 WCD & Associates