Few workplace issues make leaders as uncomfortable as suspected alcohol or drug use on the job. It’s sensitive, high-stakes, and full of legal and human complexity. One wrong move can breach privacy, procedural fairness, or health and safety obligations.
Across New Zealand and Australia, employers must walk a careful line between:
- protecting safety,
- respecting rights,
- following fair process, and
- acting quickly enough to prevent harm.
The good news?
You don’t need to guess or panic.
There is a simple, structured and defensible way to manage alcohol and drug concerns that keeps people safe and preserves dignity.
Here’s exactly how to approach these issues calmly, legally, and confidently.
1. Safety first — always
Before thinking about process, ask:
“Is anyone unsafe right now?”
Immediate risks include:
- operating machinery
- driving vehicles
- working at heights
- handling chemicals
- interacting with vulnerable clients
- impaired judgment
- aggressive or erratic behaviour
If there is an immediate safety concern:
- remove the employee from duty,
- separate them from hazards,
- arrange safe transport home if needed,
- and notify relevant leaders.
This is about preventing harm — not making assumptions or issuing punishment.
Safety action is not disciplinary action.
2. Avoid jumping to conclusions
Impairment can be caused by:
- medical conditions
- fatigue
- prescription medication
- stress or anxiety
- illness
- personal crises
- mental health challenges
Never assume drugs or alcohol are involved.
Stick to observable behaviours, such as:
- slurred speech
- poor coordination
- strong smell of alcohol
- unusually slow or erratic responses
- confusion
- aggression
- falling asleep
- inability to follow instructions
Behaviour, not suspicion, drives the process.
3. Understand your policy (or the law will fill the gaps)
A clear Alcohol & Drug Policy is essential — but many employers don’t have one, or have one that is:
- outdated
- overly punitive
- inconsistent
- unclear on testing rights
Across NZ and Australia, drug and alcohol testing is only lawful when:
- it is in the employment agreement or relevant policy,
- testing is reasonable and justified,
- testing applies according to defined risk levels (e.g., safety-sensitive roles), and
- the process is fair and respectful.
If your policy is vague, the risk increases.
If your policy is clear and consistently applied, the process becomes simple.
4. Have a calm, private discussion with the employee
This step is where most leaders get stuck — but it doesn’t need to be awkward.
Use a neutral, factual approach:
“We’ve observed some behaviours today that are concerning from a safety point of view. We’d like to check in with you and understand what’s going on.”
Stick to facts:
- “You stumbled when walking into the warehouse.”
- “There was a strong smell of alcohol.”
- “Your speech seemed slurred.”
Avoid labels like:
- “You’re drunk.”
- “You’re high.”
- “You’re intoxicated.”
These escalate tension and risk.
5. Offer a support person
This is essential for fairness.
“You’re welcome to have a support person present for this conversation.”
Even in urgent situations, provide the option.
6. Consider testing (if your policy allows it)
If impairment is suspected and your policy provides for testing, you can request:
- breath alcohol testing
- urine drug testing
- saliva drug testing
- post-incident testing
- reasonable cause testing
- random testing (in safety-sensitive roles only)
Testing must be:
- done by an accredited provider,
- explained clearly,
- offered with fair process,
- documented properly,
- conducted respectfully.
Refusal to test may be misconduct if the policy is clear — but don’t jump to conclusions until you’ve heard the employee’s explanation.
7. Send the employee home safely (if required)
If the employee is unfit for work:
- stand them down on pay (in most scenarios),
- arrange transport home (never let them drive),
- confirm that they will be contacted with next steps,
- avoid punitive language.
This is about safety — not discipline.
8. Begin the disciplinary process only after gathering facts
If the test result or evidence confirms a concern:
- follow a separate disciplinary process,
- provide written concerns and evidence,
- allow time to prepare,
- offer a support person,
- hear their explanation,
- consider context (addiction, stress, medical issues),
- explore support options (EAP, rehab, adjusted duties),
- consider proportional consequences.
Immediate dismissal is typically unsafe unless there is:
- serious misconduct,
- clear evidence,
- a safety breach, and
- a full fair process.
9. Support the employee — addiction is a health issue too
Substance use concerns often connect to:
- stress
- trauma
- burnout
- mental health
- personal crises
- addiction
In both NZ and Australia, health and safety law requires employers to manage psychosocial risks — not just physical ones.
Support could include:
- EAP
- GP referrals
- leave for treatment
- modified duties
- wellbeing plans
- structured return-to-work
- flexible arrangements during recovery
You can still manage conduct and provide support.
One HR Unlocked client shared:
“Once we split safety, support, and discipline into separate steps, everything felt calmer and fairer. The employee said they’d never felt so respected in a difficult moment.”
This is what good HR looks like: firm, fair, human.
10. Document everything
You must document:
- behaviours observed
- conversations held
- test results
- decisions made
- safety steps taken
- support offered
- disciplinary process followed
This protects both the employee and the organisation.
Common mistakes employers make (ANZ-wide)
- confronting the employee publicly
- accusing someone of being intoxicated
- skipping the support person
- testing without policy grounds
- using testing as punishment
- failing to separate safety from discipline
- not documenting
- allowing the employee to drive home
- reacting emotionally
- pre-determining outcomes
These mistakes are avoidable with structure and calm.
The bottom line
Managing alcohol or drug concerns doesn’t have to be dramatic or risky.
The key is to separate:
- safety,
- fair process, and
- support.
Across NZ and Australia, the safest and most effective approach is:
- act quickly for safety,
- avoid assumptions,
- gather facts,
- follow policy,
- apply fair process,
- provide support,
- document cleanly,
- make proportionate decisions.
Handled well, these moments become opportunities to strengthen culture — not break it.
If you want ANZ-ready alcohol & drug policies, impairment checklists, reasonable cause scripts, testing procedures and disciplinary templates, HR Unlocked gives you everything you need to manage these situations confidently — without the consulting fees or the legal jargon.
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