CSS (combat service support)

CSS stands for combat service support. NATO's glossary of acronyms and abbreviations lists the term in exactly this form, and NATO logistics documentation uses the same abbreviation (NATO AAP-15 glossary).

The Canadian Army defines combat service support as the support provided to combat forces, primarily in the fields of administration and logistics. The definition appears in the Army's modernization material, where CSS is part of how the force is planned, equipped and sustained (Canadian Army Capstone Operating Concept).

CSS compared with combat support

CSS is distinct from combat support (CS). CSS concerns sustaining combat forces, particularly through administration and logistics. NATO operational terminology uses both abbreviations, so a document that mentions CS and CSS is referring to two separate categories. Bid teams should read the two terms separately and not treat them as interchangeable.

Functions grouped under CSS

NATO material identifies a broad set of functions related to CSS. These include logistics, supply, maintenance and recovery, transportation, engineering, medical support, personnel services, financial management, legal and chaplain support, and operational contracting (NATO topic page on logistics). The range shows that CSS covers more than moving supplies. It covers the people, services and equipment that keep a force operating.

CSS in Canadian Army planning and DND equipment

The Canadian Army uses CSS in its capability planning language. Its Capstone Operating Concept calls for generating adequate quantities of CSS organizations, personnel and materiel to support operations at scale. It also calls for procuring materiel to support reconstitution (Canadian Army Capstone Operating Concept).

CSS-related requirements also show up in equipment procurement. The Department of National Defence (DND) describes the Armoured Combat Support Vehicle as providing the Canadian Armed Forces with armoured mobile vehicles for ambulance, mobile repair, vehicle recovery, engineering support, and command-and-control functions (DND procurement background note).

Contractors in the CSS matrix: the Afghanistan example

A Canadian Army account of operations in Afghanistan describes contracting and contract management as part of the CSS matrix. Contract-management cells handled goods and services contracts beyond local-purchase authority, real-life-support contracts, and NATO Maintenance and Supply Agency contracts. The same account identifies food services, material management and distribution, communications, accommodations, and power and water supply as areas augmented by contractors (Combat Service Support in Afghanistan).

What CSS means for a supplier bidding on Canadian public contracts

A solicitation that uses CSS may seek goods, services, personnel, materiel or contracting support that sustains military operations. The term tells you the purpose of the requirement, not the contract terms. Follow the specific statement of work, technical requirements, security requirements and contract terms in each solicitation. The sources reviewed do not establish one universal CSS-specific supplier clause, so each bid should be built from the tender documents themselves.

• Check whether the requirement supports sustainment, such as logistics, maintenance, medical or engineering functions.
• Distinguish CSS requirements from combat support requirements.
• Read the security and technical requirements as written in each solicitation.