September 2, 2025

Types of Workplace Investigations: Discrimination, Harassment, Bullying & More

Workplace investigations are essential for addressing concerns that affect employee wellbeing, organisational culture, and legal compliance. These investigations can cover a wide range of issues, including discrimination based on protected characteristics, harassment of a sexual or non-sexual nature, bullying that undermines dignity at work, and other forms of misconduct. Each type of investigation requires a fair, thorough, and impartial process to uncover the facts, protect the rights of all parties involved, and ensure that appropriate action is taken.

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Workplace investigations are a critical part of human resources management. No matter the industry, when complaints arise- whether about harassment, discrimination, bullying, or misconduct – HR teams must respond swiftly, thoroughly, and fairly. These investigations aren’t just a legal obligation; they’re essential for building a safe, inclusive, and compliant workplace culture.

In this article, we’ll explore the different types of workplace investigations, why they matter, and how HR professionals and consultants should approach them. Whether you’re running an internal HR department or providing outsourced HR services, understanding the ins and outs of these investigations is key to managing employee relations effectively.

Why Workplace Investigations Matter

Conducting proper workplace investigations helps businesses stay compliant with employment laws, protect employee well-being, and preserve organisational reputation. Ignoring or mishandling complaints can lead to lawsuits, poor morale, high turnover, and reputational damage. On the flip side, timely and professional investigations show that the company values fairness, transparency, and accountability.

Common Types of Workplace Investigations

Discrimination Investigations

Discrimination happens when an employee is treated unfairly because of one of the nine protected characteristics: age, disability, race, sex, sexual orientation, religion or belief, pregnancy or maternity, or gender reassignment. It often takes the form of unequal access to promotions, unjust disciplinary action, or being excluded from projects.

Investigations into discrimination typically start with a complaint and involve reviewing communication records, HR files, and interviewing witnesses. These investigations must align with legal frameworks like the Equality Act 2010 in the UK and being thorough is key because legal liabilities can be significant if discrimination is proven.

Harassment Investigations

Harassment involves unwelcome behaviour that creates a hostile work environment. Sexual harassment is one of the most serious forms, but harassment can also be verbal, physical, or psychological.

Often, victims are hesitant to make formal complaints, so it’s crucial to have clear reporting procedures and support systems in place. During investigations, documentation such as emails, messages, and personal testimonies becomes vital. Maintaining confidentiality and sensitivity is especially important, as these cases often involve emotional distress and fear of retaliation.

Bullying Investigations

Workplace bullying includes repeated behaviour intended to intimidate, humiliate, or undermine an individual. It differs from firm management styles by its persistent, targeted nature. Examples include constant criticism, social exclusion, or efforts to sabotage someone’s work.

Investigating bullying requires careful analysis of behaviour patterns, intentions, and impacts. Interviews, surveys, and even anonymous tips can be part of the evidence-gathering process. It’s important to recognise that while bullying isn’t always illegal, it still breaches workplace conduct standards.

Retaliation Investigations

Retaliation happens when an employee faces negative consequences for speaking up – whether they reported misconduct, discrimination, or any wrongdoing. Retaliation is not only unethical, but also illegal in many jurisdictions.

These investigations are complex because the retaliatory actions can be subtle, such as reduced hours or exclusion from meetings. Establishing a timeline of events and tracking changes in the employee’s treatment post-complaint is key to proving retaliation.

Misconduct Investigations

Misconduct can include a wide range of behaviour that violates company policy – such as dishonesty, breach of confidentiality, or inappropriate conduct. Misconduct investigations help determine the facts, assess impact, and decide on disciplinary action.

A structured process ensures objectivity: identifying the breach, gathering statements, analysing documentation, and drawing conclusions. Consistency in applying policies is crucial to avoid claims of favouritism or unfair treatment.

Fraud and Theft Investigations

Workplace fraud involves dishonest actions for financial or personal gain. This could be falsifying expense reports, stealing equipment, or misusing company data. Because of the financial and reputational risk, fraud investigations require a detailed and professional approach. Start by examining financial records or access logs. Interview relevant employees and, if necessary, involve forensic accountants or legal counsel. Avoid premature accusations and protect evidence integrity throughout the investigation.

Substance Abuse Investigations

Substance abuse can affect safety, performance, and workplace culture. Signs might include frequent absences, changes in behaviour, or decreased productivity. However, handling these cases requires a balance of privacy, empathy, and legal compliance.

Employers must be cautious not to discriminate against individuals struggling with addiction. Instead, consider offering support such as Employee Assistance Programs (EAPs) while investigating if the substance use impacts work responsibilities or safety.

When to Involve External HR Consultants

There are times when an external investigator is the best choice – especially for sensitive, high-risk, or executive-level cases. External consultants bring neutrality, experience, and credibility, which is particularly useful when internal staff might be perceived as biased or too close to the situation.

Bringing in a third-party also shows employees that the company takes their concerns seriously and is willing to invest in a fair process.

Choose a Reputable and Reliable Impartial Workplace Investigator

Workplace investigations are an essential function of HR. They ensure that issues like discrimination, harassment, bullying, and misconduct are addressed thoroughly and fairly. A well-handled investigation promotes trust, reduces legal exposure, and supports a positive workplace culture.

BedrockHR are a team of highly experienced qualified HR professionals and mediators, working with individuals and companies to resolve workplace investigations. We offer this service paid for on a ‘block of hours’ basis, which can be renewed as time is used, allowing you to budget and control the costs.  

Contact our team today to schedule a no obligation call, to discuss more about our services and how our team can help with your investigation on 0203 330 0827 or [email protected]

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About the Author

Picture of David Mellard

David Mellard

David qualified in 1994 and has spent the last twenty-eight years working across private business, higher education and charity sectors. David formed Bedrock HR in 2014.

David believes that every employer should create a great place to work and in turn should benefit from engaged and skilled employees, regardless of industry sector or size of organisation.

David tries to advise clients in the same way that he sails, having a light touch on the tiller, placing trust and confidence in the team and navigating through any choppy waters with a smile and taking the odd flier! As well as serving as a director of several organisations.

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