How to Write an Occupational Hygiene Proposal That Wins Work

An occupational hygiene proposal is more than a quote. It is the document that positions you as a competent professional who understands the client's exposure risks, regulatory obligations, and operational constraints. A well-structured proposal demonstrates technical credibility before you set foot on site. Clients receiving multiple quotes will almost always select the consultant whose proposal shows a clear understanding of their workplace hazards over the cheapest option with a vague scope.

The best proposals follow a predictable structure that the client can evaluate quickly. They open with a summary of the client's situation, define the scope of assessment or monitoring, explain the methodology, list deliverables, state the fee, and close with terms and conditions. Each section should be concise and free of jargon that the client's safety manager cannot explain to their operations director.

Scope creep is the single largest cause of unprofitable occupational hygiene projects. Your proposal must define exactly what is included and what is not. State the number of personal and static samples, the contaminants to be assessed, the shifts to be covered, and the areas or similar exposure groups in scope. If the client has multiple buildings, specify which ones are included.

A clear scope protects both parties. The client knows what they are paying for, and you have a written baseline to reference if they request additional work during the assessment. Always include a variation clause that explains the process for adding scope at an agreed day rate. For air monitoring proposals, specify the analytical method (such as NIOSH or AS 3640) and whether the quoted fee includes laboratory analysis costs or if these are charged separately.

The methodology section is where you demonstrate competence. Describe the sampling strategy, including how you will determine the number and placement of samples. Reference the relevant Australian Standard or international guideline you will follow, such as AS 3640 for workplace atmospheres or the AIOH sampling strategy guidance. Explain whether you will use personal or static sampling, the duration of each sample, and the equipment to be used.

For noise assessments, specify whether you will conduct dosimetry or sound level surveys, the number of workers to be monitored, and the standard applied (AS/NZS 1269 series). For hazardous substances, list each contaminant and the corresponding workplace exposure limit under the WHS Regulation 2025. Avoid copying and pasting generic methodology from previous proposals without tailoring it to the client's specific workplace. Clients can tell when a proposal has been recycled, and it erodes confidence in your attention to detail.

Present your fee as a fixed price wherever possible. Clients prefer cost certainty over hourly rate estimates that could blow out. Break the fee into components so the client can see what they are paying for: field assessment days, laboratory analysis, report preparation, and any follow-up consultation. If travel and accommodation are required, state these separately.

Your deliverables section should list every document the client will receive. At a minimum, this includes a formal assessment report with results compared against workplace exposure limits, a risk rating for each exposure group, and prioritised recommendations with control options ranked by the hierarchy of controls. If you are providing a compliance certificate or letter of assurance, state the conditions under which it will be issued. Never promise a compliance outcome before completing the assessment.

The most common mistake is failing to visit the site or conduct a pre-assessment phone call before quoting. A proposal based on assumptions about the workplace will either underquote the job, leading to a financial loss, or overquote it, leading to the client choosing a competitor. Always ask for a site walk-through or at least a detailed description of the work processes, chemicals used, and number of workers.

Another frequent error is omitting exclusions. If the proposal does not cover asbestos, biological hazards, or ergonomic assessments, state this explicitly. Clients may assume everything is included unless told otherwise. Finally, avoid technical language in the executive summary. The person approving the expenditure is often an operations manager or finance director, not a fellow occupational hygienist. Write the summary in plain language that explains the business case for the assessment.