A contractor builds a shored excavation for a pump station. The shoring is a proprietary system, supplied with a generic design from the hire company and a sticker on the panel. Eight metres down, with a surcharge from a stockpile nobody allowed for, the superintendent asks for the temporary works design certificate for this excavation, in this ground, with this loading.

There is not one. The generic design covers a range of conditions, none of them this one, and the person who stamped it is not registered in the state where the job is. The excavation stops while an engineer is found, and the stoppage costs more than the design would have.

This guide is about who is permitted to sign engineering work in Australia and what a civil contractor has to obtain and keep. The technical content of temporary works is covered in our guide to temporary works and excavation support; this is the certification layer over it.

The design you did not think you owned

On a construct-only contract the permanent works are designed by somebody else. That is the whole premise, and it leads contractors to assume design is not their problem. In practice a civil contractor owns the design of a long list of things.

• Excavation support — shoring, shielding, battering to a designed slope, and any support to adjacent structures.
• Formwork and falsework, including backpropping and striking times — see formwork, falsework and reinforcement.
• Working platforms for piling rigs, cranes and drill rigs — see piling and ground improvement.
• Lifting studies for significant or complex lifts, including crane ground bearing.
• Temporary traffic arrangements, where the traffic guidance scheme must be prepared by a qualified person — see traffic management plans.
• Dewatering systems and their effect on neighbouring ground — see dewatering and groundwater.
• Temporary bridging, access and edge protection, and loadings on existing structures during construction.
• Alternative or value-engineered permanent works you propose, which transfers design responsibility to you — see non-conforming and alternative tenders.

Each of those is professional engineering work. The question this guide answers is who may lawfully provide it and what evidence you need to hold.

Registration: what it is and where it applies

Statutory registration of engineers is spreading across Australia, and the picture is genuinely patchwork. In broad terms:

• Queensland has required registration longest. Providing professional engineering services in or for Queensland generally requires registration, or direct supervision by someone registered.
• Victoria operates a registration scheme that has been phased in by area of engineering, with civil among them.
• New South Wales has introduced registration requirements connected to its building and design reform framework, with scope that continues to develop.
• Western Australia has moved to mandatory registration for defined engineering areas, phased by discipline.
• Other jurisdictions rely primarily on licensing of building work, on client and specification requirements, and on voluntary national registers.

Three practical consequences follow, and they matter more than the detail of any one scheme.

• The obligation can follow the work, not the engineer’s office. An engineer interstate providing a design for a project in a registration jurisdiction may still need to be registered there. “My engineer is in Sydney” does not answer a Queensland requirement.
• Registration is by area of engineering. Someone registered in structural engineering is not thereby registered in geotechnical, and a shoring design is frequently both.
• The schemes are changing. Scope, phasing and commencement dates have moved repeatedly, so the only safe approach is to check the current position in the jurisdiction where the work is, at the time you need the design.

Each scheme maintains a public register. Checking it takes a minute and is the single most useful habit in this subject — search the name, confirm the area, confirm it is current, and screenshot the result with the date.

Registered, chartered and qualified are three different things

Status	What it means	Does it satisfy a legal requirement?
Qualified	Holds an engineering degree	No, by itself
Chartered	Assessed to a professional standard by a professional body	Not of itself, though it is commonly a pathway to registration and is often what a specification asks for
On a national register	Listed on a voluntary national register of engineers	Not of itself, but frequently recognised as a pathway
Registered in the jurisdiction	Entered on that state’s statutory register for that area	Yes, where that jurisdiction requires it

Contractors frequently accept “chartered engineer” as the answer to a registration question. It may well be the same person and often is — but where a statutory scheme applies, the question is registration in that jurisdiction, and a specification asking for “a chartered professional engineer” does not displace it.

What actually needs an engineer’s certificate

Certification requirements come from four directions at once, and a contractor needs to read all four rather than assume the specification covers it.

Source	Typically requires
Work health and safety regulation	Design of certain structures and plant, and competent-person involvement in high risk construction work
The project specification	Temporary works design, alternative designs, and sign-off of specified elements before use
The asset owner or road authority	Designs affecting their assets, crossings, load paths and traffic arrangements
Building and development approval	Certification of designed elements, in some jurisdictions on prescribed forms

Note the fourth row. Several jurisdictions use prescribed certification forms for design and inspection of building work — Queensland’s numbered forms are the best-known example — and civil contractors meet them on subdivision work, structures and anything that touches a building approval. The form is not optional and nor is who may complete it; see our guide to subdivision civil works for where this bites on land development.

What a usable certificate contains

A certificate that does not identify what it covers is close to useless, and generic ones are common.

• The specific structure or activity, identified by location, chainage or element — not “shoring, various”.
• The design assumptions: ground conditions relied on, surcharge loads, groundwater, plant loads, sequence and duration.
• The drawings or documents it certifies, by number and revision. A certificate detached from a revision is a certificate for an unknown design.
• Any limits and conditions — maximum excavation depth, no plant within a stated distance, required inspection before loading.
• The engineer’s name, registration number, jurisdiction and area, and the date.
• What is excluded. Many certificates exclude the ground investigation, the workmanship or the sequence, and knowing what is excluded tells you what you still own.

The most dangerous version is the proprietary system certificate: a manufacturer’s generic design, valid for a range of conditions, which the crew treats as site-specific approval. It is not. Where the actual conditions sit outside the generic envelope — deeper, wetter, surcharged, or adjacent to a structure — a site-specific design is required, and the person who decides whether you are inside the envelope should be an engineer, not a foreman.

Temporary works: the biggest exposure

Temporary works is where certification failures concentrate, for a simple reason: the works are temporary, so everyone treats the paperwork as temporary too. The structure is no less capable of collapsing.

• Appoint someone to own it. On a job of any size, one named person is responsible for the temporary works register, the designs and the sign-offs.
• Keep a register. Every temporary structure, its design status, who certified it, and when it was checked and released.
• Design before erection, inspection before loading. The gap between “built” and “permitted to be loaded” is where the control sits.
• Revisit when conditions change. A stockpile placed beside a shored excavation changes the loading the design assumed, and that is a new design question, not a housekeeping one.
• Record the removal sequence too. Dismantling is frequently more dangerous than erection and is routinely undesigned.
• Do not let hire company documentation substitute for design. It is an input to a design, not the design.

This also sits inside the safety-in-design obligation, which reaches contractors who design temporary works as much as it reaches the designers of the permanent works — see safety in design for civil contractors.

Verification, review and the second engineer

Some designs need more than one engineer, and contractors are often surprised by when.

• Independent verification is commonly required for higher-consequence temporary works and for alternative designs to permanent works. The verifier must be independent of the designer, which can mean a different firm.
• Design review by the principal’s engineer is not verification and does not transfer responsibility to them. A reviewed design is still your design.
• Proof engineering is required by some authorities for structures affecting their assets, at your cost and on their timeframe.
• Check the lead time. Verification and authority review are programme items measured in weeks, and they are regularly discovered late.

The point that costs money is the second one. A principal’s acceptance of your design is almost never an assumption of responsibility for it, and most contracts say so explicitly. Read that clause before relying on a review.

Professional indemnity, and the gap you inherit

When a contractor takes on design responsibility, it takes on a liability its ordinary insurance may not cover.

• Public liability generally excludes professional advice. A design error is not usually covered by the policy that covers damage you cause physically.
• Professional indemnity is the relevant cover, and many civil contractors do not carry it because they do not think of themselves as designers.
• Check your engineer’s cover, and that it is current and adequate for the project. Request the certificate of currency, and note that PI is usually claims-made, so cover must exist when the claim is made, not when the design was done.
• Run-off cover matters. A design defect may surface years later, after the engineer has retired or the firm has closed.
• Fitness for purpose is the trap. Where a contract imposes a fitness-for-purpose obligation on design, PI policies commonly exclude it — which creates an uninsured liability. This is covered in our guide to contract forms beyond construct-only.

The wider insurance picture, including what a civil contractor is normally required to carry, is in our guide to insurance requirements in government civil tenders.

Engaging an engineer properly

Most contractors engage engineers informally — a phone call and an invoice — which works until it does not.

• Define the scope in writing. What is being designed, to what standard, with what assumptions, and what is excluded.
• Give them the actual information. The geotechnical report, the survey, the adjacent structures, the plant you will use and the sequence you intend. A design built on assumptions you did not check is a design for a different site.
• Tell them what changes. If the sequence, plant or ground differs from what they assumed, that is a design matter.
• Confirm they are a registered professional engineer for the jurisdiction and area, and keep the register check on file.
• Agree the deliverable: drawings, calculations, a certificate, and any inspection attendance before loading.
• Agree inspection obligations, because many certificates are conditional on the designer inspecting before use.
• Price it properly. Engineering on temporary works is a real cost and belongs in the estimate rather than being absorbed.

The records that prove it later

• The certificate, with the drawing numbers and revisions it covers.
• The drawings and calculations as issued, at the revision actually built.
• The register check showing the engineer’s registration, area and currency at the date of the design.
• Their certificate of currency for professional indemnity.
• The pre-loading inspection record, signed.
• Any variation to the design, with the engineer’s agreement in writing.
• The dismantling sequence, where one was designed.

These belong in the project record rather than an engineer’s inbox, and they are exactly the kind of evidence that is impossible to reconstruct — see our guide to dockets, daily records and getting paid for the general discipline.

What tenders and prequalification ask

• Who will design your temporary works, named, with their registration and area.
• Your temporary works process — register, appointment, design before erection, inspection before loading.
• Evidence of professional indemnity, yours and your engineer’s, at the required limits.
• How design changes are controlled when conditions differ from the assumptions.
• Verification arrangements for higher-consequence elements.
• Where you are proposing an alternative, who designs it and who verifies it.

Prequalification schemes increasingly ask the same questions as a standing capability rather than per project — see civil contractor prequalification in Australia.

Where it goes wrong

Failure	Consequence
Generic system documentation used as a site-specific design	Work stopped; design obtained under pressure at a premium
Engineer not registered in the jurisdiction	Certificate not accepted; possible offence by the engineer; redesign
Certificate not tied to a drawing revision	Impossible to show what was certified; the certificate is worth little
Conditions changed after the design	The structure is operating outside its design basis
No pre-loading inspection where the certificate required one	The certificate’s conditions are unmet, so its protection is gone
No professional indemnity behind a design obligation	An uninsured liability sitting with the contractor
Fitness-for-purpose obligation accepted without checking cover	The one design liability most PI policies exclude

Checklist

• Have you listed everything on this job that you are actually designing?
• Does the jurisdiction where the work is require engineer registration, and in which areas?
• Have you checked the public register for your engineer, by name, area and currency — and kept the result?
• Is your engineer registered for the jurisdiction of the work, not just where their office is?
• Is a shoring design being treated as structural when it is also geotechnical?
• Does each certificate identify the specific location and the drawing revisions it covers?
• Do you know what each certificate excludes?
• Is a proprietary system being used inside the envelope its generic design assumes — and who decided that?
• Is there a named temporary works owner and a register?
• Is there a pre-loading inspection and release step before anything is used?
• Has anything changed since the design — surcharge, plant, groundwater, sequence?
• Is independent verification required, and is its lead time in the programme?
• Do you carry professional indemnity, and does your engineer’s cover meet the project requirement?
• Is there a fitness-for-purpose obligation in the contract, and is it insured?
• Was the engineer given the geotechnical report, survey and intended sequence?
• Is the engineering cost in the estimate rather than absorbed?

The short version

• Construct-only does not mean you design nothing. Shoring, formwork, working platforms, lifts, traffic staging, dewatering and any alternative you propose are all yours.
• Statutory engineer registration now operates in several Australian jurisdictions and the picture is a patchwork that keeps changing. Check the current position where the work is.
• The obligation can follow the work, not the engineer’s office. An interstate engineer may still need registration in the project’s jurisdiction.
• Registration is by area. Structural does not cover geotechnical, and a shoring design is frequently both.
• Qualified, chartered and registered are three different things. Only registration satisfies a statutory requirement.
• Check the public register by name, area and currency — and keep the dated result.
• A certificate must name the specific structure and the drawing revisions it covers, with its assumptions, limits and exclusions.
• Proprietary system documentation is an input to a design, not a site-specific design. Someone qualified decides whether you are inside the envelope.
• Design before erection, inspection before loading, and a new design question whenever conditions change.
• A principal’s review of your design almost never transfers responsibility for it.
• Public liability generally excludes design error. Professional indemnity is the cover, it is claims-made, and fitness-for-purpose obligations are commonly excluded.
• Give the engineer the real information, agree the deliverable and any inspection attendance, and price the engineering rather than absorbing it.

Sources and further reading

This guide is general information for Australian civil construction businesses and is not legal, engineering or insurance advice. Statutory registration of engineers is established separately by each state and territory; the jurisdictions covered, the areas of engineering within scope, commencement and phasing dates, supervision arrangements and exemptions differ materially and have changed repeatedly. Certification requirements also arise from work health and safety regulations, project specifications, asset owner requirements and building and development approval frameworks, including prescribed certification forms in some jurisdictions. Nothing here should be relied on to decide whether a particular person may lawfully provide a particular service: check the relevant statutory register and the current legislation in the jurisdiction where the work is performed. Information is current as at October 2026.

• State and territory legislation establishing the registration of professional engineers referenced in §02, including the long-standing Queensland scheme and the schemes introduced or expanded in Victoria, New South Wales and Western Australia, together with the public registers each maintains. Scope by area of engineering, phasing, supervision provisions and exemptions differ between jurisdictions and have been amended repeatedly; the governing position is the current legislation and register in the jurisdiction where the service is provided.
• Work health and safety legislation and regulations in each state and territory, for the design duties and competent person requirements referenced in §04 and §06, including those applying to structures, plant and high risk construction work. The safety-in-design duty is sourced in full in our guide to safety in design for civil contractors, and the temporary works obligations in temporary works and excavation support.
• Building and development approval frameworks referenced in §04, under which certain design and inspection certificates must be given on prescribed forms by appropriately qualified or registered persons. These frameworks and their forms differ by jurisdiction; Queensland’s numbered certification forms are the best-known example and are commonly met by civil contractors on subdivision and structures work.
• Related TenderBuilt guides carrying the primary-source detail referenced above: temporary works and excavation support, formwork, falsework and reinforcement, piling and ground improvement, contract forms beyond construct-only, insurance requirements, and contractor licensing by state.