Quinn Dressel Associates

What Quinn Dressel Associates does

Quinn Dressel Associates (QDA) is a Toronto-headquartered structural engineering consulting firm founded in 1979 by Pat Quinn and Dirk Dressel. The firm provides professional engineering services spanning new building design, structural restoration, renovation and expansion, heritage conservation, condition assessments, and seismic analysis and retrofit across nine vertical markets: academic, commercial, healthcare, heritage, hospitality, residential, secure facilities, sport and culture, and transportation. Its client base includes enterprise and institutional buyers such as AstraZeneca Canada, Royal Bank Plaza, Scotia Plaza, University of Toronto, Peter Munk Cardiac Centre, Markham Stouffville Hospital, and international airports including L.F. Wade and Billy Bishop Toronto City Airport.

QDA's technical platform is built on industry-standard structural analysis software (ETABS, SAP2000, SAFE, Autodesk Revit, AutoCAD) augmented by advanced in-house analytical capabilities including stochastic finite element analysis and nonlinear finite element analysis of reinforced concrete structures, the latter evidenced by Associate Principal Mark Hunter's peer-reviewed publication in ACI Structural Journal Vol. 118 Issue 2. The firm has delivered technically distinctive projects such as 30 Scollard Street, Canada's first high-rise condominium featuring an exoskeletal structural system, and multi-decade heritage work on St. Michael's Cathedral Basilica.

QDA operates as a privately held, project-based professional services firm generating revenue through consulting fees tied to the scope and complexity of each engagement. The firm reaches clients through direct enterprise sales, referrals within the architecture and construction industry, and a project portfolio website, with marketing support from Instagram, LinkedIn, and technical thought leadership. The firm maintains four Ontario offices (Toronto, Niagara Falls, Cambridge, Collingwood) and has executed projects across Canada, the United States, the Caribbean, Europe, the Middle East, and China.

Name

Quinn Dressel Associates

Legal name

Quinn Dressel Associates

Website

https://quinndressel.com

Company type

Private

Founded year

1979

Operating status

Operating

Headcount range

11–50 employees

Short description

Quinn Dressel Associates is a Toronto-based structural engineering consulting firm founded in 1979 that provides building design, restoration, renovation, heritage conservation, and seismic retrofit services to enterprise and institutional clients across nine verticals including healthcare, commercial, transportation, and hospitality in Canada and internationally.

Ownership category

akta.pro rank

Product category

Structural Engineering Services

NAICS

Architectural, Engineering, and Related Services (5413)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

Civil & Structural Engineering Consulting (BPAHAIAA)

akta.pro secondary industry

Construction Engineering & Constructability Consulting (BPAHAIAN)

Keywords

• Structural engineering consulting
• Building design services
• Heritage restoration engineering
• Seismic retrofit design
• Structural condition assessment

Headquarters

HQ city

Toronto

HQ country

Canada

HQ region

North America

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Others

Revenue model

1. Structural Engineering Consulting: Professional consulting services for structural design, condition assessments, heritage conservation, and seismic retrofit projects. Revenue is generated through project-based fees for engineering design, review, and consultation services on a per-project basis.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

Quinn Dressel Associates provides professional structural engineering consulting services including new building structural design, structural restoration and renovation, heritage conservation, seismic analysis and retrofit, and structural condition assessments. The firm serves architects, corporations, governments, and developers across sectors such as academic, commercial, healthcare, heritage, hospitality, residential, secure facilities, sport + culture, and transportation.

Product overview

Quinn Dressel Associates (QDA) is a structural engineering consulting firm offering professional engineering services rather than a software product. The firm provides structural design services for building projects across multiple sectors including academic, commercial, healthcare, heritage, hospitality, residential, secure facilities, sport and culture, and transportation. QDA's core services include building design, structural restoration, renovations and expansions, heritage conservation, and post-disaster and seismic studies. The firm has served clients in Canada, the U.S., Caribbean, Europe, the Middle East, and China over its 45-year history.

Differentiator

Problem solved

Functional benefit

Products and services

• Structural Engineering Design Structural engineering design services for new building projects across sectors including academic, commercial, healthcare, residential, hospitality, transportation, secure facilities, sport + culture, and heritage. Delivered for enterprise clients such as architects, developers, corporations, and governments.
• Structural Restoration and Renovation Structural engineering services for building renovations, expansions, and structural restoration projects, including retrofit of existing buildings for new uses. Notable projects include Markham Stouffville Hospital expansion, Etobicoke Olympium renovations, and theatre renovation work.
• Heritage Conservation Engineering Structural engineering services for heritage buildings, churches, historic homes, facades, and public artworks, including condition assessment, restoration, and rehabilitation with minimal-intervention, cost-conscious conservation approaches. Includes work on St. Michael's Cathedral Basilica and Toronto Old City Hall.
• Seismic Analysis and Retrofit Design Linear and non-linear seismic analyses on various structural systems, including seismic retrofit design for Post-Disaster occupancy requirements. Applied to projects across healthcare, institutional, and commercial sectors.
• Structural Condition Assessment Expert structural condition assessments to preserve structural integrity, including advanced spatial variability analysis combining ultrasonic pulse velocity measurements with stochastic finite element methods for large concrete structures.

Quantifiable outcome

• Stochastic finite element analysis demonstrated reliability index calculations for CSA A23.3-14 code compliance assessment

Named customers26 records

Segments9 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

One partnership is on record.

• +VG ArchitectscoreStrategic or Co-development PartnerQDA worked with +VG Architects and many other disciplines on the Masterplan for the Rehabilitation of St. Michael's Cathedral Basilica. This complex renovation and restoration effort was carried out over multiple phases spanning nearly two decades.

Scale indicators3 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• Read Jones Christoffersen: Canadian structural engineering consultancy with comparable boutique scale and a similar multi-sector practice spanning commercial, healthcare, heritage, and institutional projects. Closest direct peer in the Toronto structural engineering market.
• Entuitive: Toronto-headquartered structural engineering firm of similar boutique size with comparable service mix in building restoration, new construction, and specialty analysis. Directly competes for the same GTA developer and institutional clients.
• Blackwell Structural Engineers: Boutique Toronto structural engineering practice focused on commercial, institutional, and heritage work. Operates in the same niche and competes for similar GTA-based enterprise commissions.

Regional players

• WalterFedy: Multi-discipline A/E firm based in Kitchener-Waterloo with structural engineering as a core service. Operates in QDA's Waterloo Region growth corridor and competes for the same institutional and developer clients in Southwestern Ontario.
• KGS Group: Canadian engineering consultancy with structural and building services practices serving infrastructure, institutional, and commercial clients. Comparable mid-sized peer with Canadian geographic footprint.

Broad incumbents

• WSP Global: One of the world's largest engineering professional services firms, headquartered in Canada, with structural engineering as part of a broad multi-discipline portfolio. Competes for major Canadian institutional, transportation, and commercial commissions.
• Stantec: Global Canadian-headquartered engineering, architecture, and consulting firm. Competes with QDA on building structural commissions, particularly larger commercial, healthcare, and institutional projects where integrated multi-discipline delivery is preferred.
• EXP: Canadian-founded global engineering, architecture, and consulting firm with structural engineering capabilities across commercial, institutional, and infrastructure sectors. Direct competitor for mid- and large-scale building commissions.
• Arup: Global engineering consultancy with deep structural engineering heritage and a track record of signature international buildings. Competes with QDA for landmark architectural-led commissions and complex international projects.
• Parsons Corporation: Large North American engineering and infrastructure firm with building and structural engineering capabilities, particularly in secure facilities, transportation, and institutional sectors that overlap with QDA's portfolio.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/quinndressel
• Instagraminstagram.com/quinndressel

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 Quinn Dressel Associates