When the Ministry of Labour Investigates Your Workplace

A workplace inspection by Ontario’s Ministry of Labour, Immigration, Training and Skills Development can have serious implications for a business and the individuals responsible for workplace safety. An inspection may follow a worker complaint, a workplace accident, a work refusal, or a routine enforcement initiative. Following a serious injury or fatality, the investigation can become particularly complex.

Ministry inspectors have statutory powers to enter workplaces, examine relevant records, question individuals, inspect equipment, collect evidence, and issue compliance orders where authorized by law. Their findings may lead to further investigation, regulatory penalties, or charges under Ontario’s Occupational Health and Safety Act (OHSA).

For employers and supervisors, the consequences can extend beyond financial penalties. A prosecution may affect business operations, professional reputation, contractual relationships, and an individual’s employment or career.

Lex Magnus Law provides legal assistance to businesses and individuals dealing with workplace health and safety investigations, inspector’s orders, and OHSA prosecutions. We help clients understand their legal obligations, assess the evidence, respond to regulatory allegations, and evaluate the options available to them.

Our approach focuses on protecting our clients’ legal interests while addressing the practical consequences that workplace safety proceedings can create.

Understanding OHSA Liability in Ontario

The Due Diligence Defence

Many offences under Ontario’s OHSA are strict liability offences. This generally means the prosecution does not have to prove that the accused intended to violate the law. However, a defendant may be able to establish a due diligence defence by demonstrating, on a balance of probabilities, that all reasonable precautions were taken to prevent the alleged contravention.

The availability and application of this defence depend on the specific offence and the evidence.

A due diligence assessment may involve examining whether:

  • Appropriate workplace safety policies and procedures were established.

  • Workers and supervisors received adequate training and instruction.

  • Known hazards were identified and addressed.

  • Safety equipment was provided, maintained, and used as required.

  • Supervisors monitored compliance and responded to unsafe practices.

  • Previous incidents, complaints, or inspector’s orders were addressed appropriately.

  • Adequate time, staffing, equipment, and resources were allocated to the work.

Written policies alone may not be sufficient. Evidence that safety procedures were communicated, implemented, monitored, and enforced can be important when responding to an OHSA charge.

At Lex Magnus Law, we help clients examine the circumstances of the alleged contravention and identify the evidence relevant to a potential defence.

Who Can Be Charged Under the OHSA?

A single workplace incident can result in charges against more than one party. The responsibilities of each party depend on the legislation, their role, and the circumstances of the workplace.

Employers

Employers have statutory duties relating to worker protection, workplace equipment, safety procedures, and compliance with applicable requirements. An employer may face prosecution where the evidence supports an alleged breach of those duties.

Constructors and Contractors

Construction projects can involve overlapping safety responsibilities. Constructors and contractors may face scrutiny concerning site coordination, hazardous work, protective measures, and the conduct of parties working on the project.

Supervisors and Managers

Individuals who have charge of a workplace or authority over a worker may have statutory responsibilities regardless of their formal job title. Depending on the facts, they may face personal charges arising from alleged failures to communicate hazards, enforce safety procedures, or take reasonable precautions.

Directors and Officers

Directors and officers may have personal statutory duties to take reasonable care to ensure that the corporation complies with applicable health and safety requirements. Corporate compliance measures and the individual’s own conduct may be relevant to their defence.

Workers

Workers also have responsibilities under the OHSA, including complying with applicable safety requirements and using prescribed protective equipment. Depending on the allegations and evidence, a worker may face personal regulatory consequences.

The interests of an employer and an individual supervisor or director may not always align. Where each party faces separate allegations or may rely on different defences, independent legal advice may be appropriate.

Ministry of Labour Orders vs. OHSA Charges

Understanding the difference between an inspector’s order and a prosecution is an important part of responding to a workplace investigation.

Inspector’s Orders

An inspector may issue orders requiring a workplace to correct a contravention, address a hazard, obtain an engineering assessment, or stop certain work until specified requirements are satisfied.

These orders can affect project schedules, production, staffing, and contractual obligations. Certain orders may be appealed to the Ontario Labour Relations Board, subject to the applicable legislation and strict filing deadlines.

A compliance order is not itself a criminal conviction. However, the circumstances surrounding an order, the employer’s response, and any subsequent compliance failures may become relevant to later enforcement proceedings.

Lex Magnus Law can review inspector’s orders, advise on compliance obligations, and assess whether an appeal or other legal response may be available.

OHSA Charges and Prosecutions

A Ministry investigation may lead to charges prosecuted under the Provincial Offences Act in the Ontario Court of Justice.

A prosecution may involve evidence such as:

  • Inspector’s notes and investigation reports.

  • Photographs, videos, and workplace inspection records.

  • Witness statements and interview records.

  • Safety manuals, training records, and inspection logs.

  • Engineering reports and expert evidence.

  • Maintenance records, incident reports, and internal communications.

The prosecution must establish the elements of the offence in accordance with the applicable legal standard. The defence may involve challenging the evidence, disputing whether a statutory duty was breached, or establishing due diligence where available.

Early legal assessment can help identify the issues that require attention before the case progresses to trial.

Our Workplace Health and Safety Legal Services

Lex Magnus Law assists employers and individuals facing a range of workplace safety and regulatory issues.

  • Ministry of Labour investigations: Legal guidance during active inspections, investigations, and requests for workplace information.

  • OHSA charges and prosecutions: Defence of allegations involving workplace safety violations and alleged failures to comply with statutory duties.

  • Inspector’s orders and appeals: Review of compliance, stop-work, and other orders, including assessment of available appeal rights.

  • Due diligence defence: Evaluation of safety procedures, training, supervision, and other evidence relevant to reasonable precautions.

  • Director and officer defence: Representation for individuals facing personal allegations arising from corporate workplace safety matters.

  • Supervisor and manager defence: Advice and representation concerning alleged breaches of supervisory responsibilities.

  • Critical injury and fatality investigations: Guidance concerning regulatory obligations and the legal implications of a serious workplace incident.

  • Internal workplace investigations: Assistance with structuring an appropriate investigation and coordinating technical expertise where required.

  • Regulatory resolution and sentencing: Assessment of potential resolutions and preparation of submissions concerning the facts, responsibility, and penalty.

The services appropriate to a particular matter depend on the allegations, the stage of the proceeding, and the client’s role.

Workplace Injuries and Fatalities: What Employers Need to Know

A critical injury or workplace fatality can trigger multiple investigations and immediate legal obligations. Employers may need to notify the appropriate authorities, preserve relevant evidence, and comply with statutory reporting requirements.

The applicable requirements depend on the circumstances and the legislation in force.

Following a serious incident, important considerations may include:

  • Determining which immediate notifications and written reports are required.

  • Preserving the incident scene, subject to lawful exceptions.

  • Securing relevant equipment, records, photographs, and electronic evidence.

  • Identifying witnesses and maintaining accurate records of events.

  • Understanding the scope of inspector requests and other investigative powers.

  • Coordinating responses where police, the coroner, or other authorities are involved.

  • Assessing potential liability for the corporation and individual decision-makers.

A workplace incident can be stressful for everyone involved. However, actions taken in the immediate aftermath may have consequences for later regulatory or criminal proceedings.

Lex Magnus Law can advise on the legal issues arising from workplace investigations and help clients understand their obligations while protecting their rights.

The Relationship Between OHSA Proceedings and WSIB Claims

Workplace safety prosecutions and workplace injury compensation claims operate under different legal frameworks.

The Workplace Safety and Insurance Board (WSIB) administers Ontario’s workplace injury compensation system, while OHSA investigations and prosecutions address alleged breaches of occupational health and safety requirements.

A single incident may therefore involve separate reporting obligations, investigations, documents, and procedural deadlines. Information provided during one process may also become relevant to another, depending on the applicable legal rules.

Employers should not assume that resolving a WSIB matter automatically resolves a Ministry investigation or prosecution.

We help clients identify overlapping issues and understand the potential implications of their decisions across related proceedings.

Potential Consequences of an OHSA Conviction

A workplace health and safety conviction can have implications beyond the fine imposed by the court.

Depending on the offence and the circumstances, consequences may include:

  • Financial penalties: Fines can affect business cash flow, project budgets, and operational planning.

  • Personal liability: Directors, officers, supervisors, and other individuals may face penalties in their own names where convicted.

  • Business disruption: Compliance orders and workplace restrictions may delay projects or interrupt operations.

  • Reputational damage: Regulatory proceedings may affect relationships with customers, suppliers, contractors, and business partners.

  • Contractual consequences: A conviction or significant safety incident may affect tendering, contractual obligations, or eligibility for certain projects.

  • Future enforcement scrutiny: Previous orders, incidents, and compliance history may be relevant in subsequent proceedings.

The potential penalty depends on the offence, the date of the alleged contravention, the applicable statutory provisions, and the circumstances of the case. The consequences should be assessed individually rather than relying on general penalty estimates.

Contact Lex Magnus Law for Workplace Health and Safety Legal Advice

If your business is facing a Ministry of Labour investigation, your workplace has received an inspector’s order, or you or your organization have been charged under Ontario’s Occupational Health and Safety Act, obtaining timely legal advice can be important.

Lex Magnus Law assists employers, constructors, directors, officers, supervisors, and workers with workplace safety investigations, regulatory compliance, OHSA charges, and available defence options in Toronto and across Ontario.

Whether you need advice about an active inspection, a potential due diligence defence, an appeal of an inspector’s order, or a workplace injury investigation, we can help you understand the legal issues and assess the next steps.