Mark St. Cyr

Mark St. Cyr
Telephone: 416 869 5462
Fax: 416 640 3209

Suite 2100, Scotia Plaza
40 King Street West
Toronto, ON M5H 3C2

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Mark St. Cyr is a partner in the firm’s Construction Group, where he provides strategic and practical legal advice to clients at any stage of any construction project.

From the initial design concept, through procurement and construction, all the way through to project completion, Mark advises clients on how to navigate and re-distribute the inevitable risks that come with construction. With Mark’s broad drafting, negotiating, and risk distribution experience, he has had the privilege of working on a wide variety of projects, across nearly every industry, throughout Ontario, the rest of Canada, and several other parts of the world.

Mark’s practice includes both “front-end” project delivery advice and “back-end” dispute resolution. On the front-end, Mark advises clients on the procurement and project delivery models that best suit their specific needs. He has drafted and negotiated all forms of agreements one might find on a construction project, including the following forms of agreements: stipulated price construction, GMP construction, cost-plus construction, master services, design-build, alternative financing (P3/PPP), engineering, procurement and construction (“EPC”) and EPCM, integrated project delivery (“IPD”), engineering services, architectural services, “bridging” architect, construction management, and consulting services.

Given Mark’s breadth of knowledge and experience on the delivery of construction projects, Mark is also a member of the Firm’s Mining, Infrastructure, and Land Development groups, where he assists clients from a wide array of commercial, industrial, and public sector industries.

In addition to providing advice over the life of his clients’ projects, Mark also maintains a construction litigation practice where he represents clients on the “back-end” of project during dispute resolution. Mark is active as both plaintiff’s counsel and defendant’s counsel in construction lien actions, bidding and tendering disputes, bond actions, breach of trust claims, and delay and deficiency claims. Mark’s approach to disputes is to identify opportunities for a commercially sensible early resolution, while at the time mapping out the path for his clients to put their best foot forward as plaintiff or defendant.

Mark acts for clients at all levels of the “construction pyramid.” Currently, Mark counts owners from a wide variety of sectors as clients, including some from academia, financial institutions, municipalities, and several TSX listed mining companies. Mark is also currently retained by several contractors, subcontractors, material suppliers and he has even counted a few engineering firms as his clients in the past.

Despite being called in 2012, Mark has been working in the construction law space since 2009 when, during law school, Mark worked with the in-house legal team of a nationally recognized general contractor.

Recent representative work:

  • Acting for post-secondary institution in reviewing and revising the RFP documents and the construction management contract for the fast-track construction of a $100 million AI and biomedicine facility
  • Project manager and lead counsel for the development, drafting and negotiation of a full suite of agreements for the design, engineering, procurement, construction management and construction of a major financial institution’s 23-storey regional head office in Mexico City, Mexico
  • Representing a medical service provider in the development of a design-build contract with construction management for the construction of their medical facility in Richmond Hill, Ontario
  • Acting for one of Canada’s largest retailers in the preparation of a request for tenders and construction management contract for the construction of a major distribution centre in Ontario
  • Acting for a TSX listed mining company in the drafting and negotiation of a design-build agreement for the design, engineering, manufacturing, supply and commissioning of a water treatment plant for a gold mine in Columbia
  • Counsel to a Canadian gold mining company in the drafting and negotiation of an EPC contract for the creation of a brand new gold mine in Yukon Territory
  • Acting for an Ontario county in the preparation of a design consultant agreement for the design and contract administration of a $70 million state of the art long-term care facility
  • Lead counsel to a municipality entering into its first IPD model contract, which entailed drafting and negotiating the three-party IPD contract while providing guidance to the client on the IPD process
  • Acting for several municipal and regional governments to update their current suites of contracts to address the impact of the Construction Act on construction project delivery

Prior to becoming a lawyer, Mark was a crime analyst with the Royal Canadian Mounted Police, based in North Vancouver, British Columbia.


Western University, J.D., 2011

Simon Fraser University, B.A. Criminology (First Class Honours), 2005

Publications, Newsletters and Articles

Ontario’s Construction Act: Update on Substantive Amendments

Recommended Changes to Ontario's Construction Lien Act: Work in Progress

Call to the bar

Ontario, 2012


  • Canadian Bar Association
  • Ontario Bar Association
  • Toronto Construction Association (TCA)
  • Young Construction Executives Club (YCEC)

Pro Bono/Community Involvement

  • Coaches Minor Bantam Selects hockey at the Forest Hill Hockey Club



Land Development