How to Bid for Defence & Security Contracts in Greece, Step-by-step Guide for Foreign and Greek Suppliers

Understanding how to bid for defence contracts in Greece is essential for any supplier, domestic or foreign, seeking to participate in one of Europe’s most active military modernisation programmes. Greece’s Long-Term Defence Armament Planning cycle (2025–2037) has substantially increased the volume and value of tenders issued by the Hellenic Ministry of National Defence (MOD) and affiliated security agencies, creating opportunities across equipment supply, systems integration, maintenance services and construction works. This guide sets out the full procurement process, from opportunity discovery through to contract signature, and provides the document checklists, indicative timelines, cost tables and 2026-specific procedural notes that bidders need before submitting a compliant proposal.

Last reviewed: 27 July 2026

Overview of the Process and Who It Applies To

Greece maintains a substantial domestic defence industrial base, including shipbuilding, electronics and ammunition manufacturing, while also procuring major platforms and systems from international OEMs and their supply chains. The increase in procurement activity since 2025 is driven by a publicly reported programme envelope and a strategic emphasis on partnerships with allied nations, according to Enterprise Greece reporting on the defence modernisation cycle.

What Kind of Defence Tenders Are Covered

Defence and security procurement in Greece covers goods (weapons systems, vehicles, communications equipment, spare parts), services (maintenance, repair, overhaul, training, consulting, IT security) and works (military construction, infrastructure upgrades). Research and development contracts, classified projects and industrial participation programmes all fall within the scope. The applicable legal framework is Directive 2009/81/EC on defence and sensitive security procurement, transposed into Greek law, which operates alongside, but separately from, the standard public procurement rules under Directive 2014/24/EU.

Who Issues These Tenders

The principal contracting authority is the MOD’s Directorate of Defence Programs and Principal Contracts, which manages large-scale armament acquisitions. Individual armed services branches, the Hellenic Army General Staff, the Hellenic Navy and the Hellenic Air Force, issue tenders through their own armament and logistics directorates. Other security agencies (Hellenic Coast Guard, Hellenic Police, National Intelligence Service) may also procure under the defence and security directive when the contract involves sensitive security requirements. Tender notices are published on the Greek national e-procurement portal (ESIDIS/KIMDIS), the Official Journal of the European Union’s Tenders Electronic Daily (TED) where thresholds are met, and sometimes directly on MOD directorate pages.

Eligibility and Defence Procurement Greece Requirements

Before preparing any bid, suppliers must confirm they meet the eligibility criteria set out in the tender notice and in Greek procurement law implementing Directive 2009/81/EC. The core requirements apply equally to Greek and foreign bidders, though foreign suppliers face additional registration and documentation obligations.

Foreign Bidders: Legal Status, Representative and Tax Registration

Foreign companies are generally eligible to bid for defence and security procurement in Greece, provided they are established in an EU/EEA Member State or in a country with which Greece has a relevant international agreement. Bidders from third countries may participate where the specific tender notice permits it. Foreign suppliers typically need to appoint a local representative or agent authorised to accept service of documents in Greece. A Greek tax identification number (AFM) is required where the supplier will be contracting directly with a Greek authority or where the tender notice mandates it. The AFM is issued by the Greek tax authorities, and foreign entities should apply well in advance of the submission deadline.

Consortia and Defence Subcontracting in Greece

Most defence tenders allow, and some require, participation as a consortium or joint venture. The tender notice will specify whether consortia must form a distinct legal entity or may participate under a cooperation agreement. In either case, a lead contractor must be designated, and the contracting authority typically holds all consortium members jointly and severally liable for performance. Subcontracting is generally permitted, but the identities and qualifications of key subcontractors must be disclosed at the bid stage. Some tenders cap the percentage of work that may be subcontracted.

Security Clearances and Export Controls

Tenders involving classified information or controlled defence articles require a security clearance for the bidding company (facility security clearance) and, in many cases, for key personnel. These clearances are issued by Greek security authorities and MOD vetting units. The vetting process can take several months, so suppliers should initiate clearance applications as early as possible, ideally 8 to 12 weeks before the tender submission deadline. Where the items being supplied are subject to export controls, including EU dual-use regulations, Greek national export licensing, or foreign regimes such as ITAR or EAR, the bidder must ensure that all necessary export licences or approvals can be obtained and should address this in the bid documentation.

Step-by-Step: How to Submit a Defence Tender in Greece

The following numbered steps describe the MOD procurement process in Greece from initial opportunity identification through to contract mobilisation. Timelines are indicative and will vary by tender complexity, classification level and contracting authority.

Step 1, Find and Evaluate Opportunities

Monitor the Greek national e-procurement system (ESIDIS/KIMDIS) for published tender notices. Defence tenders above the relevant EU thresholds must also appear on TED (Tenders Electronic Daily), making cross-border monitoring straightforward. The MOD Directorate of Defence Programs and Principal Contracts occasionally publishes prior information notices and market consultation invitations on its own pages. Commercial tender-tracking platforms can supplement official sources. Once a relevant notice is identified, conduct a rapid bid/no-bid assessment covering technical fit, financial capacity, security clearance status and any industrial participation obligations.

Step 2, Register on E-Procurement Portals and Complete Pre-Qualification

Register on the Greek national e-procurement portal if you have not already done so. Foreign suppliers will also need to obtain an AFM from the Greek tax authorities and, depending on the tender, register with the issuing contracting authority’s supplier database. Pre-qualification requirements are specified in the tender notice: they typically include evidence of financial standing, technical capability, security clearance status and absence of exclusion grounds. Completing registrations and pre-qualification can take 1 to 6 weeks, so begin this process as soon as interest in a tender is confirmed.

Step 3, Request the Procurement Dossier and Submit Clarification Questions

Download or request the full procurement dossier, which includes the invitation to tender (ITT), technical specifications, contract conditions, evaluation criteria, required forms, and any templates for guarantees and declarations. Review these documents thoroughly and submit written clarification questions to the contracting authority within the deadline specified in the notice. Answers are typically published to all registered bidders to ensure equal treatment. Pay particular attention to any classified annexes, these may require existing security clearances simply to access.

Step 4, Prepare the Technical Proposal and Compliance Matrix

Develop the technical proposal in strict accordance with the structure mandated by the procurement dossier. Include a point-by-point compliance matrix mapping each technical requirement to the proposed solution, supported by evidence such as CE markings, ISO certifications, test reports and past performance references. Where the tender involves classified elements, address security management plans, secure storage arrangements and personnel clearance commitments. If an industrial participation or offset plan is required, prepare this as a separate annex with financial projections and a project-level implementation timeline. For tenders allowing consortia, integrate each partner’s contributions into a unified proposal.

Step 5, Prepare the Financial Proposal, Guarantees and Bid Bond

Prepare the financial proposal using the pricing schedule format provided in the tender dossier. Separately, arrange the bid bond (tender guarantee) in the format, currency and amount stipulated, typically 1% to 5% of the estimated contract value, issued by a bank or insurer acceptable to the contracting authority. Allow 3 to 14 business days for guarantee issuance, depending on your bank and the complexity of the instrument. Ensure the guarantee wording matches the template provided in the dossier; a non-compliant guarantee format is one of the most common causes of bid rejection. If an advance payment guarantee or performance guarantee is also required at submission stage, arrange these concurrently.

Step 6, Submit the Bid

Submit the bid through the designated channel, typically electronic submission via the ESIDIS platform, with qualified electronic signatures and system-generated timestamping. Some defence tenders, particularly those involving classified material, may require physical submission in sealed envelopes delivered to the contracting authority’s premises by the stated deadline. Late submissions are not accepted regardless of the reason, except in narrow circumstances where a portal malfunction can be documented. Retain proof of submission (electronic receipt or delivery confirmation) for your records.

Step 7, Evaluation, Clarifications and the Defence Contract Award Process

The contracting authority’s evaluation panel reviews bids in two stages: technical evaluation against the published criteria, followed by financial evaluation of compliant bids. The panel may request clarifications, bidders should respond within the stated timeframe, as failure to do so may result in exclusion. In negotiated procedures (common under Directive 2009/81/EC), the contracting authority may enter into dialogue or negotiation rounds with shortlisted bidders. The evaluation phase typically lasts 4 to 12 weeks, but may extend substantially for complex programmes. The award decision is notified to all participants, and a mandatory standstill period applies before contract signature in most cases, during which unsuccessful bidders may challenge the decision.

Step 8, Contract Signature, Performance Guarantees and Mobilisation

Following expiry of the standstill period and resolution of any challenges, the successful bidder signs the contract and delivers the performance guarantee (often 5% to 10% of contract value). An advance payment guarantee may also be required if the contract provides for milestone prepayments. Review the contract conditions carefully, defence contracts frequently include liquidated damages clauses, strict delivery schedules, and provisions for contract termination on national security grounds. Mobilisation begins per the agreed timeline, with milestone reporting obligations commencing at contract signature.

Required Defence Tender Documents in Greece

The specific documents required for each bid are defined in the tender notice and procurement dossier. The table below sets out the core documentation that bidders should expect to prepare. Foreign companies must ensure all documents originating outside Greece are translated into Greek by a certified translator and, where necessary, bear an apostille or consular legalisation.

For consortium bids, the lead partner must submit all of the above on its own behalf, and each consortium member must provide company registration, financial statements, security clearances (where applicable), integrity declarations and evidence of technical capability for its portion of the work. A consortium agreement or memorandum of understanding, signed by all partners, is typically required at submission.

Defence Tender Timeline and Key Deadlines

Greek defence tenders specify deadlines in either calendar days or working days, the tender notice will state which applies. Key deadline stages that bidders must track include the following.

• Publication date. The clock starts when the tender notice is published on ESIDIS/KIMDIS and, where applicable, on TED.
• Clarification period. Bidders may submit written questions up to the stated cut-off, which is typically 7 to 14 days before the submission deadline.
• Submission deadline. The final date and time (Athens local time) for bid receipt. Commonly 30 to 60 calendar days from publication, though restricted or negotiated procedures may allow shorter or longer windows.
• Evaluation window. 4 to 12 weeks for technical and financial evaluation; the contracting authority may extend this period for complex programmes.
• Award notification and standstill period. The contracting authority notifies all bidders of its decision. A standstill period, typically 10 to 15 calendar days, runs before contract signature, during which unsuccessful bidders may file a review application.
• Contract signature and mobilisation. Follows standstill expiry and clearance of any challenges.

Bidders should work backwards from the submission deadline to build a preparation schedule. Industry observers recommend starting security clearance applications at least 8 to 12 weeks before submission where clearances are required, requesting bank guarantees at least 5 to 10 business days in advance, and allowing 7 to 14 days for certified translations and apostilles of foreign-origin documents. Security vetting and export-control licence timelines are the two variables most likely to extend the period between award and contract signature.

Costs, Fees and Tax Considerations

Bidding for defence contracts involves direct costs that suppliers should budget at the outset. The table below provides indicative ranges, exact amounts are determined by individual tender notices and the supplier’s own jurisdiction and banking arrangements.

Non-resident suppliers should obtain specialist tax advice on the interaction between Greek withholding tax rules and any applicable double taxation agreement before submitting a financial proposal, as these factors directly affect pricing.

What Changes in 2026 for Bidders on Defence Contracts in Greece

The most significant development affecting defence procurement in Greece in 2025–2026 is the operational acceleration of the 12-year defence modernisation programme. Enterprise Greece has reported programmes spanning naval vessels, air defence systems, armoured vehicles, unmanned systems and communications infrastructure, with an aggregate envelope that industry observers place in the range of €25–26 billion over the planning period. This has translated into a measurably higher number of tender notices published through MOD directorates and armed-services logistics commands.

From a procedural standpoint, early indications suggest that contracting authorities are applying more rigorous security vetting criteria, particularly for tenders involving classified communications and cyber-security systems. Industrial participation and offset requirements are receiving closer scrutiny at the evaluation stage, and pre-procurement market consultations appear to be used more frequently, giving suppliers an opportunity to shape requirements before formal tender publication. Digital submission through ESIDIS remains the default channel; bidders should ensure their qualified electronic signature certificates are current and that they have tested submission workflows in advance of deadlines.

There has been no single overarching statutory amendment to Greece’s defence procurement legislation in 2026. The legal framework continues to rest on the national transposition of Directive 2009/81/EC, as published in the Government Gazette (FEK). However, individual tender notices are incorporating updated contract conditions, including revised liquidated damages provisions and tighter delivery milestone structures, so bidders should review each dossier carefully rather than relying on precedent from earlier tenders.

Common Pitfalls and How to Avoid Them

• Missing or late portal registration / AFM absence. Failing to register on ESIDIS or obtain an AFM before the tender period opens can make it impossible to download dossier documents or submit electronically. Begin registration as soon as you identify a target tender. Engage a local representative to expedite the AFM process.
• Incorrect bank guarantee format. Guarantee wording that deviates from the template in the procurement dossier is a frequent ground for bid rejection. Use the exact format provided, and have legal counsel review the guarantee before issuance.
• Failure to start security clearances early. Security vetting for company facilities and key personnel can take several months. Initiate the process at least 8 to 12 weeks before the submission deadline, or earlier where possible.
• Under-estimating industrial participation commitments. Industrial participation and offset plans that are vague or under-costed weaken the technical score and raise doubts about deliverability. Include specific, costed project proposals with realistic timelines.
• Poorly structured consortium agreements. Unclear allocation of responsibilities and liability among consortium members creates legal risk and may lead to evaluation queries. Define each partner’s scope, deliverables and financial contribution explicitly.
• Non-compliant translations or apostilles. Documents not translated by a certified translator, or missing the required apostille or consular legalisation, will be rejected. Allow 7 to 14 days for this process.
• Overlooking export controls and denied-parties screening. Failure to secure necessary export licences, or to screen subcontractors against sanctions and denied-parties lists, can void a bid or expose the supplier to criminal liability. Conduct export-control due diligence at the bid/no-bid stage.

Sources

1. Hellenic Ministry of National Defence, Directorate of Defence Programs & Principal Contracts
2. Gov.gr, Participating in Public Tenders
3. European Defence Agency, Procurement
4. EUR-Lex, Directive 2009/81/EC (Defence and Sensitive Security Procurement)
5. Enterprise Greece, Greece Moves to Upgrade Defence Sector Through Procurement Partnerships
6. National Printing House / Government Gazette (FEK)