Jeff St. Aubin is top-ranked by Leading Global Rankings Agencies and Directories.

Professional Background

Jeff is an Associate in the Construction and Infrastructure Practice Group at Singleton Urquhart Reynolds Vogel LLP. He advises a range of clients on construction matters, including both disputes and contract development. With respect to disputes, Jeff has acted for public and private owners, general contractors, and contractors on delay claims, performance defaults, lien actions, insolvencies, and procurement disputes. The resolution of these disputes has included negotiations, mediations, arbitrations, and court proceedings.

Jeff assists clients with the preparation of contract documents, including bespoke contracts for significant construction projects, customization of standard form documents, and procurement documents. Jeff has also advised lenders on the legal risks related to financing proposed construction and infrastructure projects.

The projects that Jeff has been involved with include: nuclear facilities, hospitals, waste water treatment plants, transportation infrastructure, wind and solar developments, commercial construction, electricity transmission and distribution, and natural gas distribution.

Prior to becoming a lawyer, Jeff worked for ten years with an international engineering firm and served as the general manager for two telecommunications companies. This practical experience, which included managing complex multi-year construction projects, informs Jeff’s approach to legal issues in the construction sector where his focus is on efficiently delivering solutions that align with his clients’ business objectives. Jeff also completed a Master of Laws in Energy and Infrastructure Law, further focusing his development and practice on construction and infrastructure.


  • Master of Laws, Osgoode Hall, 2017
  • Called to the Ontario Bar, 2014
  • Juris Doctor, Dalhousie University, 2013

Rankings + Recognitions

  • Recognized by Best Lawyers Canada® as “One to Watch”
  • Recipient of Alistair Fraser Scholarship for Academic Achievement


  • Member, Canadian Bar Association
  • Member, Ontario Bar Association, Construction and Infrastructure Section Executive
  • Member, Ontario Bar Association



  • Co-Chair/Speaker, “Where the Rubber Hits the Road: Potential Pitfalls Along the Road to Applying the Construction Act,” Canadian Bar Association, March, 2021
  • Speaker, Adjudication Seminar, 2020
  • Speaker, “Preparing for the Prompt Payment Regime”, Law Society of Ontario, 2019
  • Speaker, “Spotlight: How You Better Prepare for Ontario’s New Framework on Prompt Payment, Holdback, and Liens”, 3rd Annual Managing Risk in Construction Contracts and Projects, 2018
  • Speaker, “Reform of the Ontario Construction Lien Act”, Institute of Law Clerks of Ontario, 2018
  • Speaker, “Major Renovation: What Ontario’s proposed Construction Act means for projects and how to prepare”, 2017