LIKELY QUESTIONS

- How has your mechanical engineering experience prepared you to support the maintenance of motor vehicles, plant and machinery in a water works environment?
- Describe your approach to preparing detailed mechanical design drawings, specifications and bills of quantities for a plant or equipment installation.
- How do you plan preventive maintenance for a fleet of vehicles, pumps, generators, earthmoving equipment or other heavy plant?
- Walk us through how you would inspect a vehicle or machine that has repeated breakdowns and recommend the necessary repairs.
- What factors would you consider when verifying spare parts before procurement, receipt or installation?
- How would you prepare a technical valuation report for an ageing motor vehicle or item of plant?
- What criteria would you use when recommending a vehicle or plant item for boarding, disposal, overhaul or continued service?
- What is your understanding of the role of an Engineer I (Mechanical) in ensuring reliable water infrastructure operations, and how would you work with procurement, stores, transport and operations teams?

BEHAVIOURAL QUESTIONS

- Tell us about a time you diagnosed and resolved a difficult mechanical failure under operational pressure.
Model approach: Situation: Briefly describe the vehicle, pump, generator or plant failure and its operational impact. Task: State your responsibility for restoring safe operation. Action: Explain how you inspected the equipment, reviewed service history, identified the root cause, sourced or verified the correct parts, supervised repairs and tested performance. Result: Quantify reduced downtime, restored service, avoided further damage or improved reliability.

- Describe a time you identified an error in a specification, spare-part request or maintenance recommendation.
Model approach: Situation: Explain the project, repair job or procurement request. Task: State your responsibility to ensure technical accuracy and value for money. Action: Describe how you checked drawings, part numbers, equipment manuals, compatibility, standards and supplier information; explain how you raised the issue professionally and proposed a correction. Result: State the cost avoided, delay prevented, safety improvement or improved equipment performance.

- Give an example of a time you had to manage competing maintenance priorities with limited resources.
Model approach: Situation: Describe multiple equipment failures, a limited budget, staff shortage or urgent operational demands. Task: Explain your role in prioritising work. Action: Show how you assessed safety risk, operational criticality, repair cost, available spares, downtime and alternative equipment; explain how you communicated the plan to users and supervisors. Result: Highlight continuity of operations, reduced downtime, controlled costs or improved maintenance scheduling.

- Tell us about a time you worked with technicians, drivers, operators or suppliers to improve equipment performance.
Model approach: Situation: Describe a recurring fault, poor operator practice or maintenance-quality issue. Task: State your responsibility in coordinating a solution. Action: Explain how you gathered feedback, reviewed records, gave technical guidance, clarified procedures, supervised testing and monitored results. Result: Show measurable improvement such as fewer breakdowns, reduced fuel use, longer component life or stronger team compliance.

SMART QUESTIONS TO ASK

- What types of motor vehicles, heavy plant and mechanical equipment does the Engineer I (Mechanical) team support most frequently?
- What are the Agency's current priorities for fleet management, plant availability and preventive maintenance?
- How is maintenance work currently planned, recorded and monitored: through manual registers, spreadsheets or a computerized maintenance management system?
- What level of responsibility will this role have in preparing technical specifications, verifying spare parts and participating in inspection and disposal boards?
- What would success in the first six to twelve months look like for the successful Engineer I (Mechanical)?

RED FLAGS TO WATCH FOR

- Lack of clarity on the maintenance budget, availability of genuine spare parts, workshop tools or approved suppliers, which may make accountability for equipment uptime unrealistic.
- Expectations that one officer will cover an excessively large fleet, multiple distant sites and emergency repairs without adequate technicians, transport or safety support.
- Vague answers about maintenance records, procurement timelines, inspection procedures or decision-making authority for repairs, valuations and boarding recommendations.