Patrick Groom is designated as a Certified Specialist in Labour Law by the Law Society of Ontario. With more than 20 years’ experience in labour relations, he has developed particular expertise in construction labour relations and litigation, and health care restructuring.

Frequently appearing before all levels of court in Ontario, Patrick also represents clients at the Ontario Labour Relations Board, the Ontario Human Rights Tribunal, the Workplace Safety and Insurance Appeals Tribunal, the Nova Scotia Labour Relations Board, and the Newfoundland & Labrador Labour Relations Agency, as well as in private arbitrations across Canada.

Patrick advises on the development of proactive labour relations strategies that promote positive employee engagement, effectively respond to union organizing, institute best practices for occupational health and safety, and resolve of human rights issues in the workplace.

As an advisor with the Law Society of Ontario’s Coach and Advisor Network, Patrick enjoys mentoring and assisting fellow members of the bar.

Representative Matters

  • Ontario Public Service Employees Union v Rouge Valley Health System, 2017 CanLII 35613 (ON LRB)
  • I.B.E.W. Construction Council of Ontario v Labour Ready, 2016 CanLII 49532 (ON LRB)
  • Canadian Union of Skilled Workers v Labourers’ International Union of North America, 2016 CanLII 46791 (ON LRB)
  • Carpenters’ District Council of Ontario, United Brotherhood of Carpenters and Joiners of America v. Brown Daniels Associates Inc., 2016 CanLII 46789 (ON LRB)
  • Ontario Public Service Employees Union v St. Elizabeth Health Care and Canadian Mental Health Association, 2016 CanLII 6536 (ON LRB)

Speaking Engagements

Government Relations Update Ontario Electrical league, 2017 Electrical Industry Conference

May 5, 2018

Bill 148, Fair Workplaces, Better Jobs Act, 2017 Ontario Electrical League, 2018 Electrical Industry Conference

April 19, 2018

Bill 148, Fair Workplaces, Better Jobs Act, 2017 Ontario Electrical League, Durham Chapter

March 28, 2018

Bill 148, Fair Workplaces, Better Jobs Act, 2017 Ontario Electrical League, Ottawa Chapter

February 27, 2018

Legalization of Marijuana & Impact on Employers in the Construction Industry Landscape Ontario

February 9, 2018

Bill 132: Sexual Violence & Harassment Action Plan Act Ontario General Contractors Association

April 7, 2017

Reducing Turnover, Retaining Talent and Performance Management Landscape Ontario

February 21, 2017

Drugs and Alcohol in the Workplace Barrie Construction Association

June 21, 2016

The Employment Standards Act and Other Legislative Obligations Barrie Construction Association

June 8, 2016
Read more


Media Mentions

Rakings & Recognition

  • Law Society of Ontario
  • Certified Specialist (Labour Law) – April, 2015
  • University of Western Ontario
  • Brad Hodgson Civil Litigation Award, 2006
  • Labour & Employment Law Achievement Award, 2006

Directorships & Affiliations

  • Advisor, Coach and Advisor Network, Law Society of Ontario
  • Member, Thomas Moore Lawyers’ Guild
  • Member, Ontario Bar Association, Labour & Employment, Constitutional, Civil Liberties and Human Rights, and Construction Law

Education & Admissions

Called to the Ontario bar
University of Western Ontario
York University


Insights by Patrick Groom (12 Posts)

Sick, Lies, and Questionnaire: Arbitrators Uphold Terminations of Employees who Breached COVID-19 Safety Protocols

Dec 9, 2020

Two recent labour arbitration decisions held that attending work in breach of employer COVID protocols can lead to termination for cause.

McMillan’s Employment and Labour Webinar

Nov 10, 2020

This annual workshop addresses significant legal developments and provides practical advice on responding to employee issues.

Ontario Employers be Aware: New Mandatory Screening Requirements for Ontario Workplaces

Sep 30, 2020

Employers should take immediate steps to implement the new mandatory COVID-19 screening requirements for Ontario workplaces.

Another Brick in the Wall (Removed) (Part 29): Court of Appeal Continues to Chip Away at ESA Termination Provisions

Jun 23, 2020

The Ontario Court of Appeal releases a ground breaking decision with respect to enforceability of termination provisions in employment agreements.

Project Management Amid COVID-19 – The Triage

Apr 8, 2020

Best practices for construction project management during the COVID-19 pandemic, and other force majeure circumstances.

The Impact of COVID-19 on the Construction Industry: A Reference Guide to the Changed Landscape

Apr 3, 2020

Contractual clauses, Permits & Inspections, Health & Safety, Labour, Litigation, Arbitration & Court Procedures,
Limitation Periods, Liens & Holdbacks

The Impact of COVID-19 on the Construction Industry: McMillan Answers Your Questions

Mar 31, 2020

This webinar will unpack and address the impacts of COVID-19 on the construction industry and how these impacts can be best managed.

Employment and Labour Seminar Series: Toronto

Oct 30, 2019

Join us as we discuss significant legal developments and provide practical advice on critical issues facing employers in Canada.

Ontario Passes Amendments to the Labour Relations Act, 1995 and Employment Standards Act, 2000

Apr 15, 2019

Ontario Bill 66, the Restoring Ontario’s Competitiveness Act, 2018, received Royal Assent.

Ontario Proceeding with Further Substantial Amendments to Workplace Legislation

Dec 14, 2018

Ontario has introduced Bill 66, the Restoring Ontario's Competitiveness Act, 2018, an omnibus bill that proposes changes to several statutes, the LRA and ESA.

Helping Your Workplace Navigate the Legalization of Marijuana

Oct 3, 2018

McMillan has published a report entitled "McMillan (Chronic)le" to address questions to help your workplace navigate the decriminalization of cannabis.

Puff, Puff, Pass-ed: What Employers Need to Know About Cannabis Legalization

Sep 12, 2018

Join us for an interactive webinar as we take a closer look at the potential impact of cannabis legalization, as well as the rights and responsibilities of employers in the Bill C-45 era.