Jablonsky, Ast and Partners
Jablonsky, Ast and Partners is a Toronto-headquartered structural engineering consulting firm, founded in 1955, that delivers project-based structural design, analysis, and adaptive reuse services to property developers, construction companies, and heritage property owners across the Greater Toronto Area and Canada.
- Company typePrivate
- Founded1955
- HeadquartersToronto, Canada
- Headcount51–100
- GTM typeB2B
- OfferingServices
What Jablonsky, Ast and Partners does
Jablonsky, Ast and Partners is a structural engineering consulting firm headquartered in Toronto, Ontario, that has operated continuously since its founding in 1955. The firm provides structural design, analysis, and engineering solutions for new construction, structural improvements, and adaptive reuse projects, and states that it has designed structures or structural improvements for thousands of buildings across the Greater Toronto Area and broader Canadian market. Its core offering is professional structural engineering expertise delivered by multi-generational engineering teams, with explicit emphasis on cost-appropriate material and labour specifications during construction and on transparent client communication.
The firm generates revenue through project-based professional service fees, with billing tied to multi-year engagements quoted on project scope, complexity, and requirements. Its go-to-market is direct enterprise engagement with property developers, construction companies, and heritage property owners in the GTA and across Canada, supported by a horizontal segmentation approach across these three primary business units. Marketing is concentrated on the firm website and project portfolio, with no public pricing, no software or digital product offering, and no disclosed subsidiaries, partnerships, M&A activity, or external funding. Industry recognition includes the 2022 Ontario MAC Rental Development of the Year for the Story of Brampton Central project, the 2022 Ontario Concrete Specialty Innovation Technology award for Garden District Condos, the 2022 Heritage Toronto Adaptive Reuse in Built Heritage award for Waterworks, and the 2024 Ontario Concrete Structural Engineering award for Artists' Alley.
The firm's operations are concentrated at a single headquarters location in Toronto, with no disclosed international footprint, no AI or software product platform, and no public revenue or ownership data. Headcount is stated in the 51-100 employee range, consistent with a mid-sized specialized consultancy rather than a large multidisciplinary engineering firm.
Jablonsky, Ast and Partners firmographics
Firmographics- Name
- Jablonsky, Ast and Partners
- Legal name
- Jablonsky, Ast and Partners
- Website
- https://astint.on.ca
- Company type
- Private
- Founded year
- 1955
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- Jablonsky, Ast and Partners is a Toronto-headquartered structural engineering consulting firm, founded in 1955, that delivers project-based structural design, analysis, and adaptive reuse services to property developers, construction companies, and heritage property owners across the Greater Toronto Area and Canada.
- Ownership category
- akta.pro rank
Jablonsky, Ast and Partners industry classification
Industry- Product category
- Structural Engineering Services
- NAICS
- Engineering Services (54133), Engineering Services (541330)
- SIC
- Services-Engineering Services (8711)
- akta.pro primary industry
- Systems Engineering & Technical Program Management (BPAHAIAI)
- akta.pro secondary industry
- Architectural Design Services (BPAHAKAA)
Keywords
Where Jablonsky, Ast and Partners is headquartered
LocationHeadquarters
- HQ city
- Toronto
- HQ country
- Canada
- HQ region
- North America
Offices1 record
Markets served
Jablonsky, Ast and Partners business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Technology or R&D, Marketing or Sales, Others
Revenue model
- Structural Engineering Consulting: Professional engineering consulting services providing structural design, engineering analysis, and project oversight for construction and development projects. Revenue is generated through project-based professional service fees.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | Project-based professional services |
Go-to-market motion1 record
Distribution channels1 record
Marketing channels1 record
Jablonsky, Ast and Partners product offering
Product offeringCore offering
Jablonsky, Ast and Partners is a structural engineering consulting firm that provides conceptual structural designs, engineering documentation, and construction-phase engineering services for buildings and structures. The firm focuses on delivering structural design that keeps material and labour costs appropriate during construction, and applies expertise across new construction, structural improvements, and adaptive reuse of heritage buildings.
Product overview
Jablonsky, Ast and Partners is a structural engineering consulting firm offering professional engineering services rather than a software product platform. The company provides structural design consulting services for buildings and structures across the Greater Toronto Area and Canada. Their core offering is structural engineering expertise delivered through project-based consulting engagements, including structural design to control material and labour costs during construction. The firm does not operate a multi-module software platform; instead, services are delivered through teams of structural engineers working on client projects. The company maintains a portfolio of completed projects and showcases expertise across various building types, structural systems, and materials.
Differentiator
Problem solved
Functional benefit
Products and services
- Structural Engineering Consulting Services Professional structural engineering consulting services providing structural design, analysis, and engineering solutions for buildings, structures, and materials. Serves property developers, construction firms, and heritage property owners requiring specialized structural engineering expertise for new construction, structural improvements, and adaptive reuse projects.
Companies that use Jablonsky, Ast and Partners
Customer profileSegments3 records
Ideal customer profiles3 records
Jablonsky, Ast and Partners technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature1 record
Jablonsky, Ast and Partners partnerships and signals
Strategic signalScale indicators3 records
Recent moves3 records
Expansion highlights4 records
Jablonsky, Ast and Partners competitors and assessment
Company assessmentDirect peers
- RJC Engineers (Read Jones Christoffersen): RJC Engineers is a Canadian structural engineering consulting firm with offices across Canada, directly comparable in service offering, project types, and client base to Jablonsky, Ast and Partners. Both firms focus on building structural design for developers, with overlapping geographies in the GTA and Western Canada.
- Entuitive: Entuitive is a Toronto-headquartered structural and building envelope engineering firm serving developers and architects on complex building projects. It is a direct peer, matching Jablonsky in discipline focus, GTA footprint, and developer/construction clientele.
- Thornton Tomasetti: Thornton Tomasetti is a global structural engineering consultancy with strong practice in adaptive reuse, heritage structures, and complex new builds, mirroring Jablonsky's specializations. The firm competes for similar high-rise, mixed-use, and heritage projects, particularly in major Canadian and U.S. metros.
- Wiss, Janney, Elstner Associates (WJE): WJE is a structural engineering and architecture firm known for adaptive reuse, heritage preservation, and building envelope work — directly overlapping Jablonsky's heritage/adaptive-reuse niche. Both firms serve property owners, developers, and institutions on preservation-grade structural projects.
- Simpson Gumpertz & Heger (SGH): SGH is a U.S.-headquartered structural engineering firm specializing in building structures, adaptive reuse, and investigation/retrofit work. SGH is comparable in discipline focus and expertise area (heritage and complex building structures) to Jablonsky, though it serves a primarily North American client base across multiple U.S. metros.
Broad incumbents
- WSP Global: WSP is a major Canadian-headquartered global engineering services platform with structural engineering among its many disciplines. As a broad incumbent, WSP competes with Jablonsky on larger multi-discipline bids and offers overlapping structural design capability within a wider portfolio.
- Stantec: Stantec is a Canadian-headquartered global engineering, architecture, and consulting firm providing structural design among its services. As a broad incumbent, it competes on multi-discipline Canadian projects and serves many of the same developer and institutional clients as Jablonsky.
- AECOM: AECOM is a global infrastructure consulting firm with structural engineering practices supporting buildings and transit-related construction. It competes broadly with Jablonsky on large institutional and infrastructure-adjacent structural projects, particularly in the GTA and other Canadian markets.
- Arup: Arup is a global engineering consultancy with structural engineering at its core, working on ambitious building and heritage projects. While much larger, Arup competes for high-profile and complex projects comparable to the work Jablonsky undertakes, especially adaptive reuse and complex new builds in major Canadian cities.
Regional players
- Blackwell Structural Engineers: Blackwell is a Canadian structural engineering firm with strong Toronto-area practice serving developers and architects on mid- to high-rise residential and commercial projects. It overlaps directly with Jablonsky's GTA service area and customer segments, although it operates with a different regional mix.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat3 records
Key risks6 records
Key highlights7 records
Customer concentration
Jablonsky, Ast and Partners social profiles
Digital presenceJablonsky, Ast and Partners financial estimates
Financial estimateRevenue estimate
Valuation estimate
Jablonsky, Ast and Partners leadership team
Management profileNumber of profiles
Jablonsky, Ast and Partners funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Jablonsky, Ast and Partners M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Jablonsky, Ast and Partners
What does Jablonsky, Ast and Partners do?
Jablonsky, Ast and Partners is a structural engineering consulting firm that provides conceptual structural designs, engineering documentation, and construction-phase engineering services for buildings and structures. The firm focuses on delivering structural design that keeps material and labour costs appropriate during construction, and applies expertise across new construction, structural improvements, and adaptive reuse of heritage buildings.
Is Jablonsky, Ast and Partners a public or private company?
Jablonsky, Ast and Partners is a private company. It is classified as unknown and is currently operating.
When was Jablonsky, Ast and Partners founded?
Jablonsky, Ast and Partners was founded in 1955. It employs 51 to 100 people.
Where is Jablonsky, Ast and Partners based?
Jablonsky, Ast and Partners is headquartered in Toronto, Canada, in the North America region.
How does Jablonsky, Ast and Partners make money?
One revenue line is on record: structural Engineering Consulting.
Who are Jablonsky, Ast and Partners's main competitors?
Direct peers on record are RJC Engineers (Read Jones Christoffersen), Entuitive, Thornton Tomasetti, Wiss, Janney, Elstner Associates (WJE) and Simpson Gumpertz & Heger (SGH). Broad incumbents are WSP Global, Stantec, AECOM and Arup. Blackwell Structural Engineers is listed as a regional player.
Does Jablonsky, Ast and Partners have an API?
No public API is recorded for Jablonsky, Ast and Partners.
What industry is Jablonsky, Ast and Partners in?
Jablonsky, Ast and Partners's product category is Structural Engineering Services. Its primary akta.pro industry code is BPAHAIAI, Systems Engineering & Technical Program Management, with a secondary code of BPAHAKAA, Architectural Design Services. Its NAICS code is 54133 and its SIC code is 8711.