Union — Ontario Employment Law
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About Union
A common misconception among workers in Ontario is that anyone who loses their job or faces mistreatment can simply hire a lawyer and sue their employer in civil court. However, when a workplace is unionized, the legal landscape shifts dramatically. Under Ontario's Labour Relations Act, a union acts as the exclusive bargaining agent for all employees within its bargaining unit. This means that individual employment contracts are replaced by a collective agreement negotiated between the union and the employer.
Because the union holds this exclusive authority, unionized employees generally cannot sue their employers in civil court for standard employment disputes, such as wrongful dismissal or constructive dismissal. Instead, these conflicts must almost always be resolved through the grievance and arbitration process outlined in the collective agreement. In legal terms, this creates ongoing battles over "jurisdiction." Ontario courts routinely dismiss civil lawsuits filed by unionized workers because the courts lack the authority to intervene in matters that arise from the collective agreement.
That said, the courts are not completely closed to union members. As seen in various Ontario legal disputes, civil courts may retain jurisdiction over specific, non-employment-related torts or internal union conflicts. For example, if a former union president is defamed by a current union executive, or if there is a severe breach of trust obligations, the civil courts may step in to resolve the matter. These cases frequently involve preliminary legal motions to determine exactly where the boundaries of the court's jurisdiction end and the union arbitrator's authority begins.
While unionized workers enjoy the collective strength and structured representation their union provides, they also give up the ability to negotiate their own individual severance packages or immediately litigate against their employer. Disentangling whether a specific workplace conflict belongs in front of a labour arbitrator, the Ontario Labour Relations Board, or an Ontario judge is highly technical. Navigating these overlapping jurisdictions is complex, making it crucial to have an independent legal professional evaluate the unique details of your dispute before deciding how to proceed.
Frequently Asked Questions
Can I sue my employer for severance pay if I belong to a union?
Generally, no. As a unionized employee, your severance and termination rights are governed by your collective agreement and the Employment Standards Act (ESA). Any dispute over termination must be handled through your union's grievance procedure, not by filing a lawsuit in an Ontario civil court.
Can I hire an independent employment lawyer if I am unionized?
Yes, you can hire a lawyer for independent legal advice to understand your rights, human rights protections, or WSIB claims. However, an independent lawyer usually cannot bypass the union to directly negotiate your severance or represent you in a standard grievance against your employer.
What happens if I have a legal dispute with the union itself?
If your union refuses to file a grievance or represents you unfairly, you can file a 'Duty of Fair Representation' complaint with the Ontario Labour Relations Board. In rare cases involving personal wrongs—like defamation by a union official—you might be able to bring a civil claim in court.
How long do I have to challenge a disciplinary action if I am in a union?
Unionized environments operate on extremely strict deadlines. Your collective agreement will outline the exact timeframe you have to file a grievance—sometimes as short as 5 to 10 days. Failing to meet this window can permanently extinguish your right to challenge the employer's decision.
If my workplace is unionized, does the Employment Standards Act still apply to me?
Yes, the ESA's minimum standards apply to unionized workers, and a collective agreement cannot provide less than these basic rights. However, enforcement of these ESA minimums is typically handled by the union through the grievance process rather than direct claims to the Ministry of Labour.
Common Scenarios
- A recently terminated warehouse worker attempts to sue their former company for common law severance in Ontario Small Claims Court, only to have the employer successfully strike the claim because the worker is part of a certified bargaining unit.
- A former union president pursues a civil defamation lawsuit against the current union executive over damaging statements published in a newsletter, arguing the dispute falls outside the collective agreement.
- A public sector employee seeks independent legal counsel to verify if their union is meeting its legal obligations during a complex accommodation dispute involving the Ontario Human Rights Code.
- Two competing construction unions face off in a jurisdictional dispute over which entity has the legal right to represent laborers at a major new infrastructure project.
What You Should Know
- Always secure a copy of your current collective agreement and pay close attention to the grievance procedure deadlines, as missing a filing window by even one day can be fatal to your case.
- Keep meticulous written records of your communications with union stewards or representatives, especially if you feel they are dismissing your concerns or refusing to file a grievance on your behalf.
- If you are considering taking legal action against your union or employer in civil court, have an independent lawyer assess the 'jurisdiction' issue first to avoid paying legal costs for a dismissed claim.
- Remember that the union owns the grievance; they get to decide whether to push your case to arbitration based on their assessment of its merits and the broader interests of the bargaining unit.
Featured Cases
Charette v. Customs and Immigration Union
2025 ONSC 1719 (CanLII) · 2025-03-18A labour relations case involving the Customs and Immigration Union concerning the jurisdiction of courts in administrative law matters.
Canadian Union of Public Employees, Local 79 v. City of Toronto
2023 ONSC 2031 (CanLII) · 2023-03-30A labour relations matter involving the Canadian Union of Public Employees, Local 79 and the City of Toronto concerning a contempt of court order.
CUPW v. B’nai Brith Canada et. al
2020 ONSC 323 (CanLII) · 2020-01-16Union Defamation Suit: Anti-SLAPP Motion Dismissed
This is a procedural ruling on an Anti-SLAPP motion brought by defendants in a defamation action initiated by a union. The court addressed whether the union had the legal personality to sue for defamation and applied the statutory balancing test under s. 137.1 of the Courts of Justice Act to determine if the claim had substantial merit.
General Motors of Canada Company v. Unifor Canada
2019 ONSC 2627 (CanLII) · 2019-04-26This is an interlocutory proceeding involving an application for an interim injunction in the context of a labour dispute between an employer and a union. The case addresses procedural matters regarding strikes and industrial action.
Canadian Union of Postal Workers v Her Majesty in Right of Canada and Canada Post Corporation
2016 ONSC 1879 (CanLII) · 2016-03-16A labour relations matter involving the Canadian Union of Postal Workers and Canada Post Corporation concerning collective agreements and bargaining agreements, with a procedural focus on interveners.
Terceira v. Universal Workers Union
2013 ONSC 7698 (CanLII) · 2013-12-18A labour law case concerning jurisdictional preliminary questions of law involving a union.
Canwest Global Publishing Inc
2012 ONSC 633 (CanLII) · 2012-01-25CCAA Claims & Arbitrator Mandate: Union Review
This is a judicial review proceeding concerning claims filed by a union on behalf of retired employees under the Companies' Creditors Arrangement Act (CCAA) and the mandate of an arbitrator under a collective agreement. The court addressed the standard of review for CCAA Claims Officer decisions and whether an arbitrator exceeded their mandate in a final best offer process.
Canada Post Corporation v. Canadian Union of Postal Workers
2011 ONSC 3804 (CanLII) · 2011-06-16This is a procedural ruling concerning the grounds for granting an interim injunction under s. 102(3) of the Courts of Justice Act in a dispute between an employer and a union.
Toronto (City) v. Toronto Civic Employees Union, Local 416
2009 CanLII 40562 (ON SC) · 2009-07-31An interlocutory proceeding involving an application for an interim injunction in a dispute between a city and a civic employees union.
Ali v. Toronto Police Association
2009 CanLII 20339 (ON SC) · 2009-04-20A labour law case concerning jurisdictional issues involving the Toronto Police Association.
Elementary Teachers' Federation of Ontario v. Ontario (Labour)
2008 CanLII 20339 (ON SC) · 2008-05-02A procedural costs ruling in a labour relations matter involving the Elementary Teachers' Federation of Ontario and the Ontario Labour Relations Board.
Labourers' International Union of North America, Local 183 v. Shell
2007 CanLII 3227 (ON SC) · 2007-02-11Union Jurisdiction Dispute: Labourers' Union v. Shell
A labour law dispute involving the Labourers' International Union of North America, Local 183, focusing on jurisdictional issues and the intersection with legal professional privilege.
Canadian Film and Television Production Association v. Alliance of Canadian Cinema, Television and Radio Artists
2007 CanLII 1883 (ON SC) · 2007-01-30A labour relations dispute involving the Canadian Film and Television Production Association and the Alliance of Canadian Cinema, Television and Radio Artists concerning the interpretation or application of a collective agreement.
National Health and Welfare Union v. Public Service Alliance of Canada
2006 CanLII 22935 (ON SC) · 2006-07-06An interlocutory proceeding involving an application for an interim injunction between two unions in the context of labour law.
Access Health Care Services v. Ontario Nurses' Association
2005 CanLII 47713 (ON SC) · 2005-12-15A judicial review application concerning an arbitration award in a labour dispute between a healthcare service provider and a nurses' union.
Reliable Food Supplies Inc. v. International Brotherhood of Teamsters Union, Local 419
2005 CanLII 56220 (ON SC) · 2005-03-24This is a procedural ruling concerning the requirements for obtaining an injunction under s. 102 of the Courts of Justice Act in the context of a dispute between an employer and a union.
Brunet v. Ottawa Police Assn.
2004 CanLII 12162 (ON SC) · 2004-05-26A labour and employment case involving the Ottawa Police Association regarding the enforcement of rights and jurisdictional issues under the Charter of Rights.
Ledcor Industries Ltd. v. Sheet Metal Workers' International Ass.
2004 CanLII 16548 (ON SC) · 2004-01-23This is an interlocutory proceeding concerning the principles governing the grant of an injunction in the context of secondary picketing by a trade union.
Cummins v. Ontario Public School Teachers' Federation
2003 CanLII 38884 (ON SC) · 2003-11-14A legal dispute involving the Ontario Public School Teachers' Federation concerning a contract of employment and alleged breach of that contract.
Morissette v. Canada (Attorney General)
2003 CanLII 43670 (ON SC) · 2003-10-23This is a labour law application concerning the interpretation or validity of a collective agreement. The case arises from the relationship between a union and an employer under a collective bargaining framework.