How to Write an Employee Position Description That Works Within Your Employment

A position description can quietly create big employment problems when it does not match the employment agreement. New Zealand employers often make the same mistakes: they copy a generic job description from online, they treat the position description as if it can override the signed agreement, or they draft duties so narrowly that the employee cannot be asked to do ordinary business tasks without an argument. Those issues usually show up later, when the role changes, performance concerns arise, or a restructuring is proposed.

A well-written position description should support your employment agreement, not compete with it. It should explain what the role looks like in practice, set realistic expectations, and leave enough flexibility for the business to operate. The tricky part is getting the wording right so you are clear without locking yourself into something unhelpful.

This guide explains how to write an employee position description that works within your employment agreement, what New Zealand businesses should check before you sign, and the common drafting mistakes that can create unnecessary risk.

Overview

A position description is usually a practical role document, while the employment agreement is the legal contract that sets the core employment terms. The best drafting makes those documents fit together clearly, so there is no confusion about duties, reporting lines, hours, location, flexibility, and how changes may be made.

When you prepare a position description for a New Zealand employee, the main issues are consistency, clarity, flexibility, and fairness. If the documents point in different directions, the signed employment agreement will usually be the starting point, but inconsistent drafting can still create disputes and make management decisions harder to defend.

• Make sure the role title, reporting line, hours, and place of work match the employment agreement.
• State the main duties clearly, but avoid an exhaustive list that prevents reasonable changes later.
• Include wording that the employee may perform other reasonable duties within the scope of the role and business needs.
• Check that performance expectations are realistic, measurable where possible, and consistent with any bonus or commission terms.
• Do not use the position description to change pay, status, hours, or other contractual terms without updating the employment agreement properly.
• Review the documents together before you sign, especially if you are hiring your first worker or adapting an old template.

What This Means For Your Business

For New Zealand businesses, this means your position description should be a supporting document that reflects the actual job and sits neatly alongside the employment agreement. It should help with hiring, induction, supervision, and performance management, without creating contradictions or accidental promises.

What a position description actually does

A position description explains the practical shape of the role. It usually sets out the job title, who the employee reports to, the main purpose of the role, key duties, areas of responsibility, and sometimes key performance indicators.

It is often attached to the employment agreement or referred to in it. That matters because once the agreement is signed, the position description may become part of the overall contractual picture, even if the agreement remains the primary legal document.

How it fits with the employment agreement

Your employment agreement usually covers the legally binding fundamentals, such as pay, hours, leave, termination provisions, trial or probation clauses where used lawfully, confidentiality, restraint wording where appropriate, and workplace policies. The position description should add role detail, not rewrite those core terms.

For example, if the employment agreement says the employee is full time and works 40 hours per week in Auckland, the position description should not say the role is part time, casual, or based remotely across New Zealand. If the agreement says the employee reports to the Operations Manager, the position description should not name a different reporting line unless both documents are updated.

Why founders and managers often get caught

This is where founders often get caught: they think the position description is just an internal HR note. Then the business grows, responsibilities shift, and the employee says, fairly enough, that the written role did not include those duties.

The issue is not that every role must stay frozen. Most jobs change over time. The issue is whether your documents gave you room to make reasonable changes and whether you handled those changes in good faith.

Under New Zealand employment law, employers and employees owe duties of good faith to each other. In practice, that means you should not try to use a broad or vague role description to force through a major change in duties, seniority, hours, or location without consultation. A flexible clause helps, but it does not let an employer sidestep fair process.

What good drafting looks like in practice

A useful position description is specific enough that the employee knows what success looks like on day one, but broad enough to reflect normal business reality. A customer service role might include handling enquiries, processing orders, resolving common issues, maintaining records, and assisting with related administrative tasks. It should not need a full rewrite every time the business changes a software system or reallocates minor tasks within the team.

You should also think about how the role will be used later. Position descriptions are often pulled out during recruitment, onboarding, disciplinary meetings, performance reviews, and restructures. If the wording is sloppy, outdated, or inconsistent with the agreement, it can weaken your position when you most need clarity.

When a position description needs to be updated

A position description should be reviewed whenever the role meaningfully changes. Common trigger points include:

• a promotion or change in seniority
• a permanent shift in duties
• a change in reporting line
• a relocation or regular remote working arrangement
• a move from part time to full time, or vice versa
• new performance measures tied to remuneration

If the change affects contractual terms, update the employment agreement too. A refreshed position description alone is not a safe substitute.

Legal Issues To Check Before You Sign

Before you sign, check whether the position description and the employment agreement tell the same story. The main legal risk is not the existence of a position description, it is inconsistency between documents or wording that gives a false impression about the role.

1. Consistency with the minimum terms in the employment agreement

Start with the core details. The role title, employment status, hours, location, manager, and any agreed flexibility should line up across both documents.

Look closely at:

• full time, part time, fixed term, casual, or permanent status
• ordinary hours of work and any roster expectations
• main place of work and any travel requirements
• reporting line and management responsibility
• whether the employee supervises others

If any of those matters differ, fix the drafting before you sign. Leaving it vague usually causes more trouble than taking five minutes to align the wording.

2. The difference between duties and contractual promises

A position description can describe duties, but it should be careful about making promises the business may not be able to keep. This comes up with targets, bonuses, level of autonomy, growth opportunities, and support resources.

For example, if the position description says the employee “will lead a team of five” but the business only has two direct reports available, that wording can cause immediate trust issues. If it says the role “includes quarterly bonuses” but the employment agreement is silent or uses different criteria, you have created avoidable ambiguity.

3. Flexibility wording

You usually want a clause making it clear that the employee may be required to perform other reasonable duties consistent with the role, their skills, and business needs. That wording matters because no position description can predict every task that may arise.

Still, flexibility has limits. A general statement about “other duties as reasonably required” does not automatically allow:

• a major demotion
• a substantial increase in workload without proper discussion
• a permanent transfer to a different location
• a shift into a materially different role
• changes to hours or status that contradict the agreement

If you expect broader change over time, your employment agreement should address that carefully, and any significant variation should usually be discussed and agreed in writing.

4. Fixed term and project-based roles

If you are hiring on a fixed term basis, the position description should not undermine the fixed term reasons stated in the employment agreement. In New Zealand, fixed term arrangements need genuine reasons and proper documentation. If the agreement says the role exists to cover parental leave, but the position description reads like an open-ended ongoing role, the overall drafting may become harder to defend.

5. Performance expectations and disciplinary risk

Position descriptions often help frame performance management. That only works if the expectations are clear and realistic. Avoid stuffing the document with every ideal trait or inflated KPI you can think of.

It is better to include a concise set of core responsibilities and, where relevant, objective measures such as service standards, accuracy requirements, response times, sales goals, or compliance responsibilities. If those measures affect pay or performance processes, make sure the agreement and any workplace policy documents match.

6. Health and safety responsibilities

Where a role has workplace health and safety responsibilities, note them in plain language. This is especially helpful for supervisors, site managers, drivers, warehouse staff, and roles involving equipment, field work, or customer premises.

The wording should reflect the actual role. Do not insert generic safety obligations that ignore how the employee really works. If the person is expected to report hazards, follow procedures, use protective equipment, or supervise safe practices, say so clearly.

7. Privacy, confidentiality, and access to business information

If the role involves customer data, employee records, pricing, supplier arrangements, or commercially sensitive information, the position description can mention those responsibilities at a high level. The detailed legal obligations should still sit in the employment agreement, privacy notice, and relevant policies.

This is particularly relevant before you hire your first worker into admin, sales, payroll, or operations roles. The employee should understand from the outset that handling personal information and confidential business material is part of the job.

8. Policies and separate documents

Many businesses use policies for matters like remote work, health and safety, IT use, leave procedures, and performance review processes. Your position description should not accidentally convert every policy detail into a fixed contractual promise.

A simple way to manage this is to keep the position description focused on the role itself, and let the employment agreement explain whether policies may be updated from time to time.

Common Mistakes With How to Write an Employee Position Description That Works Within Your Employment Agreement

The most common mistake is treating the position description as an afterthought. When it is copied, outdated, or inconsistent, it can make ordinary people issues much harder to manage.

Using a generic template with no link to the actual role

A recycled template often contains duties the employee will never perform and misses the tasks they actually do each week. That causes confusion from day one and makes onboarding less effective.

If the role is in a small business, the document should reflect that reality. A startup operations hire may wear several hats. A retail supervisor in a two-site business may spend substantial time on the floor. The wording should match the job you are genuinely offering.

Writing the duties too narrowly

Some employers list every task in a way that turns the role into a closed box. Then they discover that asking the employee to help with a related task leads to pushback because it is “not in the job description”.

Describe the main responsibilities, then allow for other reasonable duties connected to the role. That approach gives clarity without making the document rigid.

Writing the duties too vaguely

The opposite problem is a role description that says almost nothing useful. Phrases like “assist with business activities” or “perform tasks as directed” do not tell the employee what matters and do not help much if performance issues arise.

Good drafting balances scope and detail. The employee should be able to read the document and understand the role purpose, key outputs, and everyday responsibilities.

Trying to change the job without changing the contract

Businesses sometimes update the position description and assume that is enough to change the role. It is not, where the change affects contractual matters such as hours, status, seniority, location, reporting structure, or remuneration.

Before you sign any updated paperwork, ask whether the change is merely descriptive or whether it changes the legal bargain. If it changes the legal bargain, the employment agreement also needs attention and may require a contract review.

Using unrealistic KPIs

A position description is not the place to impress candidates with impossible targets. If the measures are unrealistic, constantly changing, or outside the employee's control, they can undermine trust and make later performance discussions look unfair.

Choose a small number of measures the employee can influence and understands. Review them periodically as the business changes.

Ignoring reporting lines and decision-making authority

Confusion about who the employee reports to, who approves leave, or who has authority to sign off spending is common in growing businesses. If the position description says one thing and daily practice says another, conflict often follows.

This matters even more where there are co-founders, a new layer of managers, or a transition from informal to structured reporting.

Failing to review the role after growth or restructure

Many SMEs draft a position description once and never revisit it. Six or twelve months later, the role has changed substantially, but the paperwork has not.

That creates risk during performance management and restructures because the written record no longer reflects the real job. A short periodic review can prevent that problem.

Practical drafting tips that usually work well

When preparing a new position description, it helps to include:

• a short statement of the role purpose
• the key responsibilities, grouped into sensible categories
• the reporting line
• any genuine supervisory responsibilities
• the main skills, qualifications, or experience needed for the role
• a reasonable “other duties” clause
• the date of the version being used

It also helps to avoid:

• promotional language that overstates the role
• guarantees about career progression
• detailed policy wording that belongs elsewhere
• contradictions with the employment agreement
• copying overseas wording that does not fit New Zealand practice

FAQs

Does a position description form part of an employment agreement?

It can, especially if it is attached to the agreement or clearly referred to in it. Even where the agreement is the main contract, the position description may still influence how the role is interpreted.

Can I change an employee's duties by updating the position description?

You can usually update minor duties within the existing role if the change is reasonable and consistent with the agreement. You should not rely on a position description alone to make major changes to hours, location, status, pay, or the essential nature of the role.

How detailed should a position description be?

It should be detailed enough that the employee understands the purpose of the role, the main duties, and who they report to. It should not be so detailed that every small operational change requires a redraft.

What happens if the position description conflicts with the employment agreement?

The employment agreement is usually the stronger legal document for core contractual terms. Even so, conflicting wording can create uncertainty, disputes, and problems during performance management or restructuring, so it is best to align both documents before you sign.

Do small businesses need position descriptions?

They are not legally required for every role, but they are often very useful. For startups and SMEs, a clear position description can reduce misunderstandings, support onboarding, and make later people decisions easier to manage.

Key Takeaways

• A position description should support your employment agreement, not contradict it.
• Keep the key terms aligned, especially role title, status, hours, location, reporting line, and responsibilities.
• Draft duties clearly, but leave room for other reasonable tasks connected to the role.
• Do not use a position description as a shortcut for changing contractual terms.
• Review and update both documents when the role changes in a meaningful way.
• Clear drafting helps with hiring, onboarding, performance management, and reducing disputes later.

If you want help with employment agreement drafting, position description wording, role changes, or performance management processes, you can reach us on 0800 002 184 or team@sprintlaw.co.nz for a free, no-obligations chat.