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EllisDon

EllisDon Corporation · Part of 100% Employee-Owned

EllisDon is an employee-owned Canadian global construction services and technology company founded in 1951 and headquartered in Mississauga, Ontario. The firm delivers general contracting, construction management, design-build, civil infrastructure, and public-private partnership projects across healthcare, transit, commercial, and industrial markets. Operating across Canada and internationally with over 10,000 employees, the organization completes billions of dollars in annual construction volume.

2 sources

Mississauga. Researched from public sources. Published November 15, 2026.

What the research found

Identity and footprint

EllisDon Corporation is a 100% employee-owned Canadian global construction services and technology enterprise established in 1951. Headquartered in Mississauga, Ontario at 1004 Middlegate Road, Suite 1000, the company operates across Canada and internationally with over 10,000 employees. In Ontario, it maintains its corporate head office in Mississauga along with major regional operating offices in London (2045 Oxford Street East) and Ottawa (2680 Queensview Drive). Specialized operating subsidiaries include EllisDon Civil Ltd. and EllisDon Construction Services Inc., delivering major civil, institutional, and commercial works across the province.

Confidence: high

3 sources

Operating model

EllisDon operates as a full-service general contractor and construction manager delivering buildings, civil infrastructure, industrial facilities, and public-private partnerships (P3/AFP). Delivery methods include construction management, design-build, integrated project delivery (IPD), and lump-sum general contracting. Primary clients comprise provincial and municipal public bodies (such as Infrastructure Ontario, transit authorities, and regional healthcare networks) as well as private commercial developers. Projects range from multi-million-dollar facility renovations to multi-billion-dollar hospital and transit developments delivered through specialized consortia and operating divisions.

Confidence: high

3 sources

Make versus buy

EllisDon self-performs construction management, general contracting oversight, conceptual and trade estimating, project management, virtual design and construction (VDC/BIM), health and safety leadership, pre-construction planning, and digital building coordination with its own permanent professional staff. It subcontracts virtually all field trade execution, including mechanical, electrical, plumbing, structural steel, concrete formwork, masonry, drywall, roofing, glazing, earthworks, and wet utilities. It also procures major engineered equipment, pallet racking, signage, site trailers, and specialized risk products such as Subcontractor Default Insurance (SDI).

Confidence: high

2 sources
  • Confidently work alongside a team through project procurement, the bid process, and pre-construction Assemble accurate, detailed, and well-organized budgets and estimates Organize sub-contractor quotes
    6. DeepSeek search: "@ellisdon.com" "estimator" OR "estimating"
  • EllisDon Construction Services Inc is inviting interested trades/vendors to submit on this project which consists of interior finishes, electrical & mechanical work.
    7. DeepSeek search: site:merx.com "ellisdon"
  • EllisDon Civil Ltd. is the Construction Manager for the Downtown Brampton Flood Protection (DBFP) Project in the City of Brampton. EllisDon Civil Ltd. invites all qualified firms (hereinafter called the “Subcontractor”) to submit a Proposal for Enabling Wet Utilities works required for the...See mor…
    7. DeepSeek search: site:merx.com "ellisdon"
  • · EllisDon is using Subcontractor Default Insurance (SDI) on this Project. This is an insurance product that replaces Subcontractor bonding.
    7. DeepSeek search: site:merx.com "ellisdon"

Procurement and intake

Procurement decision-making is structured by function and project package. The Estimating Department manages trade bid packages, solicitations, quantity reviews, and sub-trade quote evaluations, adhering strictly to the Subcontractor Bill of Rights where the lowest qualified sub at closing secures the package and bid shopping results in immediate termination. Procurement and tendering administrators issue formal RFPQs and solicitations through MERX and COMPASS. Subcontractor Payables handles commercial onboarding, auditing certificates of insurance, WSIB clearance certificates, statutory declarations, and indemnities before approving monthly progress payments.

Confidence: high

3 sources

Qualification gates

EllisDon maintains mixed labour status: it is bound to provincial collective agreements with building trade unions in the Ontario ICI sector stemming from historic working agreements recognized by the Ontario Labour Relations Board, while operating non-union or mixed frameworks in civil and non-ICI markets. The company holds Certificate of Recognition (COR) safety certification from the Infrastructure Health & Safety Association (IHSA) and is a member of the Ontario General Contractors Association (OGCA). Trade subcontractors must complete prequalification via COMPASS, comply with Subguard/SDI criteria on packages exceeding $500,000, utilize SUBcentre for subcontracts over $100,000, maintain current WSIB clearance certificates, and furnish commercial general liability insurance satisfying subcontract Schedule I requirements.

Confidence: high

4 sources

Active signals

Active indicators confirm substantial ongoing commercial activity across Ontario. In July 2025, ED+PCL Healthcare Partners reached financial close on a $13.9 billion contract with Infrastructure Ontario and Trillium Health Partners to design, build, finance, and maintain The Peter Gilgan Mississauga Hospital and Shah Family Hospital for Women and Children. In July 2026, EllisDon Civil Ltd. was awarded construction management services for the Combined Sewer Overflow realignment and public realm works at Ontario Place. Active tendering is underway for the $200.0M Oak Valley Health Uxbridge Hospital Development closing in October 2026. Recruiting notices in late 2026 for London-based subcontracts payable administrators further demonstrate active project administration and trade onboarding.

Confidence: high

3 sources
  • EllisDon and PCL Construction (ED+PCL Healthcare Partners), with equity partners Plenary Americas and Fengate Asset Management, have reached Financial Close on The Peter Gilgan Mississauga Hospital and Shah Family Hospital for Women and Children – the largest hospital project in Canada’s history.
    5. DeepSeek search: "EllisDon" "awarded" OR "contract" "Ontario" 2025 OR 2026
  • Infrastructure Ontario (IO) and the Ministry of Tourism, Culture and Gaming (MTCG) have awarded a contract to EllisDon Civil Ltd. for the construction management services to re-align and extend the Combined Sewer Overflow (CSO) located at 955 Lake Shore Boulevard West for the Ontario Place Redevelopment Project.
    5. DeepSeek search: "EllisDon" "awarded" OR "contract" "Ontario" 2025 OR 2026
  • #### Oak Valley Health – Uxbridge Hospital Development Job Number TOR-F2027-004 Location Uxbridge, Ontario Prime Consultant Diamond Schmitt Architects Owner Oak Valley Health Values: $200.0 M Closing Date Oct 27, 2026
    8. Subcontractors & Bid List | We Build on Great Relationships
  • You as a Subcontracts Payable Insurance Administrator will: - Play a key role on our Subcontractor Payables team, obtaining and reviewing all required insurance certificates, WSIB/WCB certificates, and other supporting documentation from subcontractors and project managers to ensure compliance with internal policies.
    9. DeepSeek search: "EllisDon" "WSIB" "subcontractor" OR "insurance"

Technology and systems

EllisDon employs an integrated technology stack combining proprietary and leading commercial construction software. It utilizes the COMPASS SaaS platform (Bespoke Metrics) for centralized subcontractor prequalification and financial risk analytics. Project management and vendor billings are handled through its proprietary Gate3 platform alongside the SUBcentre subcontractor portal (mandatory for subcontracts over $100,000). Solicitations and RFPQ packages are managed electronically via MERX. In the field and design coordination, teams utilize Procore Technologies cloud construction management, Autodesk Construction Cloud, and Bluebeam Revu for virtual design, drawing markups, and project collaboration.

Confidence: high

2 sources

How it buys

Does itself
Buys or subcontracts
Who buys
  • Estimating Department: Responsible for trade package takeoffs, soliciting competitive sub-bids from trade contractors, evaluating closing proposals, and recommending awards based on lowest qualified sub quote in compliance with the Subcontractor Bill of Rights.
    1 source
  • Procurement and Tendering: Issues formal Requests for Pre-Qualification (RFPQs) and trade tender packages via MERX and manages trade qualification workflows through the COMPASS platform.
    1 source
  • Subcontractor Payables: Administers subcontractor commercial compliance, obtaining and auditing insurance certificates, WSIB clearance certificates, statutory declarations, and indemnities prior to issuing progress payments.
    1 source
    • - Ensure the correct requirements are met on the insurance certificate, per the schedule I attached to each subcontract, ensure that Workers Compensation is current and in good standing, Checking the accuracy of Statutory Declarations and Indemnity’s along with other required documents. - Liaise with project managers and subcontractors to obtain all required documentation, including insurance and WSIB / WCB certificates
      9. DeepSeek search: "EllisDon" "WSIB" "subcontractor" OR "insurance"
  • Project Management and Site Operations: Project managers and site coordinators manage subcontractor field delivery, scope coordination, monthly progress billing sign-offs, and deficiency resolution.
    1 source
    • Subcontractors can securely access real-time project details, including billing, communication, deficiency tracking, and documentation, all in one place. It’s everything needed to stay organized and connected, with no installations or upgrades required.
      8. Subcontractors & Bid List | We Build on Great Relationships
Taking on new vendors
Open, through a supplier portal
https://www.ellisdon.com/subcontractors-and-bid-list
EllisDon operates an open vendor intake channel through its dedicated Subcontractors & Bid List website page, which publishes active project tenders, closing dates, values, and direct estimating contact routes. Trade contractors prequalify via the third-party COMPASS management system (compass-app.com) and participate in electronic RFPQ and bid packages distributed through MERX.
2 sources
  • Whether it’s a $5M renovation or a $1B hospital, EllisDon delivers consistency. Subcontractors can securely access real-time project details, including billing, communication, deficiency tracking, and documentation, all in one place. It’s everything needed to stay organized and connected, with no installations or upgrades required.
    8. Subcontractors & Bid List | We Build on Great Relationships
  • Please also be advised that EllisDon has moved to the Compass Management System https://compass-app.comas of Dec 18, 2023
    7. DeepSeek search: site:merx.com "ellisdon"
Platforms
  • COMPASS: web-based SaaS used to collect, organize, and analyze subcontractor data, assess financial capability, and evaluate prequalification rankings
  • Gate3: internal proprietary SaaS platform used for construction project management, budget balancing, vendor billings, and cashflow tracking
    1 source
  • SUBcentre: subcontractor project management portal mandatory for subcontracts over $100,000
    1 source
    • · Subcontracts over $100,000 are required to use EllisDon's SUBcentre project management system; All contractors will be subject to a non-negotiable Gate Three fee.: For contracts between $100,000 - $1,000,000, the rate is $99.00/month; For contracts greater than $1,000,000, the rate is $1,200/year for the duration the contract until all payments been released.
      7. DeepSeek search: site:merx.com "ellisdon"
  • MERX: electronic bidding portal utilized for publishing RFPQ packages, trade solicitations, and receiving tender submissions
    1 source
  • Procore: cloud construction management software for field workflows, document management, and project coordination
    1 source
  • Autodesk Construction Cloud: construction technology and virtual design and construction platform for project model and drawing collaboration
    1 source

What it asks of suppliers

Union status
Mixed
EllisDon is bound to Ontario provincial collective agreements with building trade unions in the industrial, commercial, and institutional construction sector pursuant to historic working agreements recognized by the Ontario Labour Relations Board. In other sectors, civil infrastructure divisions, and regions where mandatory union subcontracting is not applicable, the company engages both unionized and non-union trade partners.
1 source
  • The unions took the position that EllisDon is bound to the provincial collective agreement of each of them as a result of a document signed in Sarnia in 1958 (the “Sarnia Working ... and that EllisDon violated the provincial collective agreements of both unions by subcontracting
    10. DeepSeek search: "EllisDon" "union" OR "collective agreement" OR "OLRB"
  • EllisDon is not required to use masonry contractors bound to the Masonry Collective Agreement in those locations, and in fact has retained other unionized masons on the Outside Projects. While EllisDon is under no obligation to contract masonry work outside of Toronto to contractors bound by the Masonry Collective Agreement...
    10. DeepSeek search: "EllisDon" "union" OR "collective agreement" OR "OLRB"
Holds
Requires of suppliers
Commercial requirements
  • Subcontractors must provide and maintain valid Workplace Safety and Insurance Board (WSIB/WCB) clearance certificates in good standing prior to project commencement and payment release.
    1 source
    • - Ensure the correct requirements are met on the insurance certificate, per the schedule I attached to each subcontract, ensure that Workers Compensation is current and in good standing, Checking the accuracy of Statutory Declarations and Indemnity’s along with other required documents. - Liaise with project managers and subcontractors to obtain all required documentation, including insurance and WSIB / WCB certificates
      9. DeepSeek search: "EllisDon" "WSIB" "subcontractor" OR "insurance"
  • Subcontractors must furnish commercial general liability insurance certificates conforming to EllisDon subcontract Schedule I insurance requirements.
    1 source
    • - Ensure the correct requirements are met on the insurance certificate, per the schedule I attached to each subcontract, ensure that Workers Compensation is current and in good standing, Checking the accuracy of Statutory Declarations and Indemnity’s along with other required documents.
      9. DeepSeek search: "EllisDon" "WSIB" "subcontractor" OR "insurance"
  • Subcontracts with values exceeding $500,000 require Contract Performance Security via prequalification acceptance and rating under EllisDon's Subcontractor Default Insurance (SDI) program or supplementary acceptable security at the subcontractor's expense.
    1 source
    • All Subcontracts with a subcontract value in excess of $500,000 must have Contract Performance Security in the form of an acceptance and rating from EllisDon. The rating from EllisDon must be equal to, or in excess of the subcontract amount, or the subcontractor will be required to supplement the security with alternate forms of security acceptable to EllisDon, at the Subcontractor’s expense.
      7. DeepSeek search: site:merx.com "ellisdon"
  • Subcontracts valued over $100,000 must utilize EllisDon's SUBcentre project management system, subject to a Gate Three monthly or annual software fee.
    1 source
    • · Subcontracts over $100,000 are required to use EllisDon's SUBcentre project management system; All contractors will be subject to a non-negotiable Gate Three fee.: For contracts between $100,000 - $1,000,000, the rate is $99.00/month; For contracts greater than $1,000,000, the rate is $1,200/year for the duration the contract until all payments been released.
      7. DeepSeek search: site:merx.com "ellisdon"
  • Direct deposit enrollment is available and preferred for faster, cost-effective progress payment processing.
    1 source

Locations

3 locations

Recent activity

A joint venture between EllisDon and PCL Construction, operating as ED+PCL Healthcare Partners, reached financial close on a $13.9 billion fixed-price contract with Infrastructure Ontario and Trillium Health Partners to design, build, finance, and maintain The Peter Gilgan Mississauga Hospital and Shah Family Hospital for Women and Children, representing the largest healthcare P3 project in Canadian history.

Current, dated · 2025-07-09

1 source

Infrastructure Ontario and the Ministry of Tourism, Culture and Gaming awarded a construction management services contract to EllisDon Civil Ltd. to re-align and extend the Combined Sewer Overflow at 955 Lake Shore Boulevard West for the Ontario Place Redevelopment Project.

Current, dated · 2026-07-13

1 source
  • Infrastructure Ontario (IO) and the Ministry of Tourism, Culture and Gaming (MTCG) have awarded a contract to EllisDon Civil Ltd. for the construction management services to re-align and extend the Combined Sewer Overflow (CSO) located at 955 Lake Shore Boulevard West for the Ontario Place Redevelopment Project.
    5. DeepSeek search: "EllisDon" "awarded" OR "contract" "Ontario" 2025 OR 2026

EllisDon actively tendered trade packages for the $200.0 million Oak Valley Health Uxbridge Hospital Development project (Job TOR-F2027-004) in Uxbridge, Ontario, with bid closing scheduled for October 27, 2026.

Current, dated · 2026-10-27

1 source

EllisDon conducted active recruitment for a Subcontracts Payable Insurance Administrator in London, Ontario, to oversee subcontractor compliance documentation including insurance certificates, WSIB certificates, statutory declarations, and indemnities.

Current, dated · 2026-10-03

1 source
  • You as a Subcontracts Payable Insurance Administrator will: - Play a key role on our Subcontractor Payables team, obtaining and reviewing all required insurance certificates, WSIB/WCB certificates, and other supporting documentation from subcontractors and project managers to ensure compliance with internal policies.
    9. DeepSeek search: "EllisDon" "WSIB" "subcontractor" OR "insurance"

EllisDon Corporation announced the executive appointment of a Chief Operating Officer and Executive Vice President of its Services division.

Current, dated · 2024-10-29

1 source

Organizations and projects

Worked with PCL Construction

Joint venture partner forming ED+PCL Healthcare Partners to execute the $13.9 billion Peter Gilgan Mississauga Hospital and Shah Family Hospital for Women and Children project.

pcl.com · 2025-07-09

1 source

Delivered for Infrastructure Ontario

Provincial infrastructure procurement agency awarding major healthcare, transit, and public realm construction contracts to EllisDon entities across Ontario.

infrastructureontario.ca · 2026-07-13

1 source
  • Infrastructure Ontario (IO) and the Ministry of Tourism, Culture and Gaming (MTCG) have awarded a contract to EllisDon Civil Ltd. for the construction management services to re-align and extend the Combined Sewer Overflow (CSO) located at 955 Lake Shore Boulevard West for the Ontario Place Redevelopment Project.
    5. DeepSeek search: "EllisDon" "awarded" OR "contract" "Ontario" 2025 OR 2026

Delivered for Trillium Health Partners

Regional healthcare network client for The Peter Gilgan Mississauga Hospital and Shah Family Hospital for Women and Children hospital campus.

2025-07-09

1 source

Delivered for Ministry of Tourism, Culture and Gaming

Ontario provincial ministry contracting EllisDon Civil Ltd. for construction management services on the Ontario Place Redevelopment Project.

2026-07-13

1 source
  • Infrastructure Ontario (IO) and the Ministry of Tourism, Culture and Gaming (MTCG) have awarded a contract to EllisDon Civil Ltd. for the construction management services to re-align and extend the Combined Sewer Overflow (CSO) located at 955 Lake Shore Boulevard West for the Ontario Place Redevelopment Project.
    5. DeepSeek search: "EllisDon" "awarded" OR "contract" "Ontario" 2025 OR 2026

Delivered for Oak Valley Health

Public healthcare organization client for the $200.0 million Uxbridge Hospital Development project.

2026-10-27

1 source

Worked with Diamond Schmitt Architects

Prime architectural consultant on the Oak Valley Health Uxbridge Hospital Development project.

1 source

Delivered for Toronto Transit Commission

Municipal transit authority commissioning subway station accessibility improvements and infrastructure rehabilitation from EllisDon Civil Ltd.

ttc.ca

1 source

Worked with Bespoke Metrics

Technology vendor providing the COMPASS subcontractor prequalification and financial risk analytics SaaS platform utilized across EllisDon.

compass-app.com

Worked with Procore Technologies

Software vendor providing cloud-based construction project management solutions deployed on major EllisDon projects.

procore.com

1 source

Affiliated with EllisDon Civil Ltd.

Affiliated civil infrastructure operating company sharing headquarters in Mississauga, executing heavy civil, transit, and environmental infrastructure projects across Ontario.

1 source

Affiliated with EllisDon Construction Services Inc.

Affiliated operating company issuing design-build, renovation, and construction trade solicitations on MERX across Canada.

1 source

People

The research has 14 people on record at this company: 4 who decide on purchases, 6 who route requests, 4 senior, with no observed buying function. It holds 7 email addresses and 2 phone numbers that public pages list for them.

  • Kieran [Register for last name] · President & Chief Executive Officer
    Executive Leadership · Mississauga, Ontario · Executive
  • Marlene [Register for last name] · Senior Vice President, People & Culture
    People & Culture · Mississauga, Ontario · Executive
  • Dustin [Register for last name] · Vice President, Marketing & Communications
    Marketing & Communications · Mississauga, Ontario · Routes requests
  • Domenic [Register for last name] · Estimator
    Estimating - Central Ontario · Uxbridge, Ontario · Routes requests
  • Ali [Register for last name] · Estimator
    Estimating - Central Ontario · Uxbridge, Ontario · Routes requests
  • Sean [Register for last name] · Estimator
    Estimating · Bridgewater, Nova Scotia · Routes requests
  • Megan [Register for last name] · Procurement / Solicitation Contact
    Procurement and Tendering · Ottawa, Ontario · Routes requests
  • Amber [Register for last name] · Procurement / Solicitation Contact
    Procurement and Tendering · Ottawa, Ontario · Routes requests
  • Andrew [Register for last name] · Senior Vice President & Toronto Area Manager
    Toronto Area Operations · Toronto, Ontario · Decision maker
  • Wayne [Register for last name] · Chief Operating Officer and Executive Vice President of Services
    Services Division · Mississauga, Ontario · Executive
  • Max [Register for last name] · Chief Operating Officer & Executive Vice President, Construction
    Construction Operations · Mississauga, Ontario · Executive
  • Randy [Register for last name] · Senior Vice President and Area Manager for Southwestern Ontario
    Southwestern Ontario Operations · London, Ontario · Decision maker
  • Mike [Register for last name] · Vice President and Area Manager for Ottawa
    Ottawa Operations · Ottawa, Ontario · Decision maker
  • Doug [Register for last name] · Estimating Manager
    Estimating · Mississauga, Ontario · Decision maker

Last names, direct contact details and outreach routes are gated behind registration.

Sources

12 pages
  1. About Us | We Build on Great Relationships
    Read November 15, 2026
  2. DeepSeek search: "EllisDon Corporation" Mississauga
    Read November 15, 2026
  3. Contact Us | We Build on Great Relationships
    Read November 15, 2026
  4. DeepSeek search: "EllisDon" "Gate3" OR "Procore" OR "CMiC"
    Read November 15, 2026
  5. DeepSeek search: "EllisDon" "awarded" OR "contract" "Ontario" 2025 OR 2026
    Read November 15, 2026
  6. DeepSeek search: "@ellisdon.com" "estimator" OR "estimating"
    Read November 15, 2026
  7. DeepSeek search: site:merx.com "ellisdon"
    Read November 15, 2026
  8. Subcontractors & Bid List | We Build on Great Relationships
    Read November 15, 2026
  9. DeepSeek search: "EllisDon" "WSIB" "subcontractor" OR "insurance"
    Read November 15, 2026
  10. DeepSeek search: "EllisDon" "union" OR "collective agreement" OR "OLRB"
    Read November 15, 2026
  11. DeepSeek search: "EllisDon" "COR" OR "Certificate of Recognition" "Ontario" OR "IHSA"
    Read November 15, 2026
  12. DeepSeek search: "EllisDon" "Senior Vice President" OR "Vice President" "Toronto" OR "Mississauga"
    Read November 15, 2026

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