Thommessen is a market-leading full-service Norwegian business law firm with 300+ lawyers across Oslo, Bergen, Stavanger and London. We provide specialised Defence & Security advisory to suppliers and industrial actors – not government contracting authorities – helping them deliver mission critical capabilities securely and efficiently across complex, security sensitive programmes. As a full-service firm with specialist expertise across key practice areas, our cross-disciplinary teams support the full lifecycle from capture and bidding to delivery, sustainment and upgrades. We operate across naval, land, aerospace, and cyber segments, and support cross-border work through our London office and a leading international network (including Lex Mundi).

Our services include:

• Supplier-side support for defence programmes and security-classified contracts: from bid capture and tendering to contract execution, in-service support and upgrades
• Complex contracting with NDMA/MoD and prime contractors; consortia, teaming, flow downs and industrial cooperation/offset
• Security requirements and clearances: classified information handling, facility/personnel clearances and secure operating models
• Secure supply chain: subcontracting, resilience, supplier due diligence and human rights/ESG
• Export and trade controls, sanctions risk and cross-border technology transfers
• Cybersecurity and operational data: secure architecture, cloud/sovereignty, incident readiness and response
• IP and technology: protection, licensing, collaboration and disputes
• Investments and transactions in Defence & Security: M&A, financing, JV structuring and national security considerations
• Dispute resolution and investigations: bid/procurement challenges, performance disputes and compliance matters
• Insurance and risk allocation in major defence programmes
• Employment matters and clearances

Thommessen offers FSi member companies one hour of free consultation with two lawyers for an initial assessment of the matter. We can also offer complimentary in-house training on defence-related topics in connection with assignments, as well as priority access to Thommessen’s courses and seminars within defence- and security-related business