What is EMOS in Australian Defence?
EMOS stands for Estate Maintenance and Operations Services. It is the Department of Defence's overarching commercial framework for outsourcing day-to-day facility management across the Defence estate: every Army base, RAAF base, Navy depot, training area and Defence-leased site.
EMOS contracts replaced earlier, fragmented Base Services arrangements as Defence consolidated FM delivery into a smaller number of large, regionalised prime contracts. The current generation of EMOS / PAS contracts is structured around geographic regions: an East Coast prime, a West Coast prime and others covering the Northern Territory, central Australia and specific service categories.
Under EMOS, the prime contractor is responsible for:
- Routine and reactive maintenance of buildings, mechanical and electrical systems, grounds and infrastructure
- Asset operations: energy, water, waste, security systems, fire systems
- Condition assessments and capital works planning
- Work order management through Defence-mandated systems
- Lifecycle and replacement programs for major plant
- Compliance reporting against ERIK and PAS framework requirements
- Subcontractor management: the prime delivers most work through a deep subcontractor base
For Defence, EMOS gives a single accountable party per region. For subcontractors, EMOS is the gatekeeper to working on Defence sites without holding a head contract.
Who Holds EMOS Contracts?
EMOS prime contracts have been awarded to the major Australian facility management firms. As of 2026:
- Downer Group: Awarded the East Coast Property & Asset Services contract (announced May 2025, valued at approximately $3.05 billion over an initial 7-year term with extension options). This covers NSW, ACT, Victoria, Tasmania and parts of southern Queensland.
- Ventia: Long-standing Defence Base Services contractor, holding contracts across multiple regions
- BGIS: Operates in specific regional and category-based EMOS arrangements
- Serco, Cushman & Wakefield and others hold or have held specific category or sub-regional roles
These tier-one prime contractors do not perform the bulk of trade work themselves. They subcontract specialist trades (mechanical, electrical, fire, security, hydraulic, building fabric, grounds), specialist services (cleaning, catering, waste) and discipline consultants. The vast majority of contractors who actually work on a Defence base do so as EMOS subcontractors.
If you supply, install or maintain a system on a Defence base in Australia, your contract is almost certainly a flow-down from an EMOS prime.
EMOS, PAS, ERIK: How They Fit Together
The Defence FM commercial framework has several acronyms that overlap and confuse contractors entering the market. The simple hierarchy:
| Layer | Acronym | What it is |
|---|---|---|
| Contract framework | SoFC | Suite of Facilities Contracts: the contract template library |
| FM contract programme | PAS | Property & Asset Services: the contract suite for outsourced FM |
| Specific contracts | EMOS | Estate Maintenance and Operations Services: the regional prime contracts inside PAS |
| Quality framework | ERIK | Estate Resources Information Kiosk (ERIK): the quality standards every EMOS contractor and subcontractor must meet |
| Asset data system | DAMIS | Defence Asset Management Information System: the data backbone EMOS contractors feed |
Translation: a subcontractor on a Defence base is delivering work under EMOS (the contract), inside PAS (the programme), to SoFC contract terms (the templates), against ERIK quality requirements (the standards), with asset data captured for DAMIS (the system).
For more on ERIK specifically, see our ERIK guide.
What EMOS Means for Subcontractors
If you're a trade subcontractor, mechanical services contractor, electrical contractor, fire systems specialist or building services supplier working on a Defence base under an EMOS prime, the practical implications are:
Compliance flow-down
Every ERIK quality requirement flowed down to the EMOS prime is flowed down again to you. You'll be required to maintain a quality plan aligned with the prime's, produce inspection and test records, manage non-conformances and submit documentation matching the Defence template structure.
Asset data submission
Work you perform must be reflected in DAMIS-compatible asset records. The prime's CMMS will be the immediate destination, but data must flow downstream into DAMIS. Mis-formatted asset data is one of the most common subcontractor invoicing delays on Defence work.
Work order discipline
EMOS primes operate strict work order systems with mandatory acceptance, completion and close-out workflows. Variations require formal change requests with cost and time impact assessments. The casual "we'll sort it out at the end of the job" model that works on commercial sites does not work on a Defence base.
Security clearances
Depending on the site, subcontractors and their staff require Defence security clearances. The clearance process is administered by AGSVA (Australian Government Security Vetting Agency) and typically takes 3-12 months. Plan for clearance lead times in tender responses.
Documentation as deliverable
The work itself is one deliverable; the documentation is a separate, equally important deliverable. O&M manuals, commissioning records, training materials and warranty documents are contractual line items, not afterthoughts. Withholdings and back-charges for documentation gaps are common.
Common EMOS Subcontractor Pain Points
Across Australian Defence projects, the recurring subcontractor pain points are:
1. Document submission rejection
You upload your O&M manual section to the prime's portal. It bounces back with "doesn't match Defence template structure", sometimes weeks after submission. The fix is to use the correct ERIK-aligned structure from the start, not retrofit at handover.
2. Asset data mismatches
You numbered your assets the way you always do. The prime needs DAMIS-aligned identifiers. You're re-keying every asset entry. The fix is to configure the asset register schema at project mobilisation, not at handover.
3. Spares list and warranty mismatches
Your supplier provided a spares list in their format with their warranty start date. Defence's FM contractor needs spares with DAMIS-aligned data and warranties from Practical Completion. Manual reconciliation eats days.
4. Defects Liability Period (DLP) confusion
A defect comes back during DLP. Was it under your scope or the next-stage maintenance contract? Records are split across email, the prime's portal and your own systems. Without a single source of truth, the back-and-forth can last months and end in lost-margin write-offs.
5. Multi-prime documentation
Subcontractors working across multiple EMOS primes (Downer East Coast, Ventia, BGIS) face slightly different portals, naming conventions and metadata requirements. The underlying ERIK structure is the same; the wrapper differs.
How Procom Helps Subcontractors and Managing Contractors Meet EMOS Expectations
Procom Solutions provides an O&M manual compilation and handover platform that aligns with the structure EMOS primes expect:
- ERIK-aligned templates so subcontractor uploads match the Defence structure on the first submission, not after rejection
- Asset register schema configurable to match DAMIS at project start, no retrofitting at handover
- Subcontractor submission portal with mandatory metadata enforcement: uploads missing signatures, dates or drawing references are blocked at the upload step
- Progress dashboard for the Managing Contractor showing live percentage completion of every subcontractor's documentation
- PDF and electronic manual export in the format Defence and EMOS primes accept
- DLP defects workflow that links each reported defect back to the originating commissioning record, NCR or O&M section, closing the audit trail
The platform does not replace the trade skill or the quality manager. It replaces the spreadsheet, the shared drive and the email chain, the three places where ERIK-aligned documentation actually goes wrong. Learn more about Procom's defence O&M manual platform.