Verification of Competency (Trencher)

Purpose of the Verification of Competency (Trencher)

Operating a trencher involves significant risks, including trench collapse, striking underground services, and general mobile plant hazards. While a worker may hold a relevant licence or ticket, a Verification of Competency (VOC) confirms their ability to operate a specific model of trencher safely and effectively in a real-world work environment.

This document provides a structured framework to assess an operator's knowledge of WHS procedures, pre-start checks, operational skills, and shutdown processes. A formal VOC process helps a Person Conducting a Business or Undertaking (PCBU) meet their primary duty of care by ensuring workers are competent for the tasks they perform.

This assessment goes beyond basic training by focusing on practical application and site-specific rules. It creates a formal record that competence has been verified, which is a key component of effective risk management for high-risk work like excavation.

The process is similar for other ground-engaging equipment, and our guide on verifying competency for stump grinders provides another relevant example for outdoor plant operations.

How to use the Verification of Competency (Trencher)

This Verification of Competency (Trencher) template provides a solid starting point for developing your own assessment tool. It is designed to be downloaded and customised to suit your specific needs.

• Step 1: Customise the Template. Review and modify the checklist to reflect the specific make and model of the trencher being used, your site-specific hazards (e.g., soil types, known underground services, overhead powerlines), and your organisation's safe work procedures.
• Step 2: Conduct the Assessment. A competent and authorised assessor observes the worker perform tasks across the full operational cycle, from planning and pre-start inspections to trenching and shutdown procedures. The assessor uses the customised checklist to record observations.
• Step 3: Document the Outcome. The assessor provides feedback to the worker and formally records the outcome. If the worker is deemed competent, the record is filed. If not yet competent, a plan for further training and reassessment must be documented and implemented.

Important: This document is a template and must be customised. We are not WHS consultants and have not prepared this document with your specific plant, site, or operations in mind.

You must adapt it to your workplace to ensure all local risks and control measures are included. For best practice, this process should be integrated into your broader WHS management system.

When to use it

A VOC for trenching equipment should be conducted at several key points to ensure ongoing safety and competence. It is not a one-off event. Consider using this assessment tool in the following situations:

• Pre-employment or prior to starting a new role: To verify the skills and safety awareness of new hires or workers moving into a new position involving trencher operation.
• Introduction of new equipment: When a new make or model of trencher is introduced to the workplace, even experienced operators should be verified on the new machine.
• Post-incident or near miss: If a trencher is involved in a safety incident, a VOC can help identify any competency gaps that may have contributed.
• Periodic reassessment: As part of a regular schedule (e.g., every 1-3 years, as determined by a risk assessment) to ensure skills have not degraded over time.
• Upon request or observation: If a supervisor observes unsafe behaviour or has concerns about an operator's ability.

The principles of verification apply to many high-risk construction tasks, such as those detailed in our Verification of Competency for a concrete or floor saw.

Who should use it

This resource is designed for individuals responsible for workplace safety and operator training. This includes:

• Supervisors and Line Managers: Those who directly oversee workers operating trenchers and are responsible for authorising their work.
• Work Health and Safety (WHS) Managers and Advisors: Professionals tasked with developing, implementing, and reviewing safety procedures and competency frameworks.
• Trainers and Assessors: Internal or external personnel who conduct the practical assessments. Crucially, any person acting as an assessor must be competent themselves, with extensive experience on the specific trencher and a strong understanding of assessment principles.

If your organisation lacks the in-house expertise to confidently customise this template or conduct the assessment, it is advisable to seek advice from a qualified WHS consultant to ensure the process is robust and effective.