Chapter 1 · Part I — Orientation

    Who NASA Buys From: Contractors and Civil Servants

    Almost everything NASA builds, flies, and operates passes through a contract. Understanding where civil service work ends and contracted work begins is the first useful thing to learn before pursuing any of it.

    NASA is, by design, a small permanent workforce directing a much larger contracted workforce. The agency sets requirements, retains technical and safety authority, and manages public funds, but the majority of the design, fabrication, integration, testing, operations, and IT work that produces a mission is performed by companies under contract. This is not a recent shift. It has been the operating model since the earliest human spaceflight programs, and it is the reason a guide to NASA contracting exists at all: the contracted portion of NASA's mission is where nearly all commercial opportunity lives.

    Civil servants versus contractors: what the line actually is

    Federal law and the Federal Acquisition Regulation (FAR) reserve a category of work called inherently governmental functions to federal employees. These are functions tied to the exercise of sovereign authority: approving a contract award, making a policy determination, exercising final safety-of-flight authority, or obligating federal funds. A contracting officer's signature on an award, for example, cannot be delegated to a contractor employee no matter how much of the underlying analysis that contractor performed.

    Everything else is, in principle, contractible, and NASA contracts an enormous share of it. Systems engineering, spacecraft integration and test, mission operations, software development, facilities maintenance, IT infrastructure, scientific research, and even significant portions of safety analysis are routinely performed by contractor personnel working alongside civil servants, often in the same building, sometimes at the same console. The civil servant retains responsibility for the decision; the contractor frequently performs the work that informs it.

    Where NASA civil servants concentrate their effort

    • Setting mission requirements and technical standards
    • Contract award decisions and administration, held by warranted contracting officers
    • Final safety and mission assurance authority
    • Program and project management oversight
    • Basic and applied research performed directly by NASA scientists at the centers

    A NASA center is best understood as a relatively small core of civil servants who own requirements, budget, and decision authority, surrounded by a much larger population of contractor personnel who perform the engineering, operations, and support work needed to execute the mission. The ratio varies by center and by era, but the structure is consistent across the agency.

    The prime contractor and subcontractor structure

    Large NASA programs are usually anchored by one or a handful of prime contractors holding a direct contract with NASA. Primes assemble teams of subcontractors and suppliers to deliver the full scope of work, and a prime's proposal typically names its intended subcontractors and describes how work is divided. Smaller companies most often enter NASA work as a subcontractor to a prime before pursuing prime contracts of their own; the chapter on subcontracting and teaming works through how those relationships are formed and documented.

    Direct-to-NASA contracts are also common, particularly for smaller-dollar procurements, research awards, and set-asides reserved for small businesses. A company does not need to be large to hold a prime contract with NASA; it needs a registered entity, the right classification codes, and a proposal that meets the solicitation's requirements. Chapter 3 covers how NAICS and PSC codes determine which opportunities a given company is even shown.

    Where the money actually goes

    NASA's budget divides broadly into civil service salaries and benefits, and everything else: hardware, launch services, mission operations, research, facilities, and IT. The "everything else" category is overwhelmingly executed through contracts, grants, and cooperative agreements. Contracts are the mechanism for acquiring goods and services for the government's direct benefit; grants and cooperative agreements fund research and other activities where the government is not the direct customer for a deliverable in the same sense. This guide focuses on contracts, since that is the mechanism through which a company sells products and services to NASA.

    What this means for a company evaluating whether to pursue NASA work

    A company does not need to compete with NASA's civil service; it needs to identify where NASA has already decided to contract, and position itself to compete for that scope. That starts with basic entity registration, covered in Chapter 2 on SAM.gov registration, and continues with understanding which NASA center actually buys the kind of work a company does, covered in Chapter 4 on NASA centers. The remainder of this guide walks through that process in the order a new entrant typically encounters it.

    Common questions

    Does NASA build its own hardware, or does it all come from contractors?

    NASA civil servants design, review, oversee, and in some cases fabricate hardware in-house, particularly for science instruments and early prototypes. But the large majority of spacecraft, launch vehicle, ground system, and IT work is performed by contractors under NASA oversight. Civil servants set requirements, manage contracts, and retain final technical and safety authority.

    What is an inherently governmental function?

    It is work so intertwined with the exercise of sovereign authority that only a federal employee can legally perform it, such as approving a contract award, making a policy decision, or exercising final safety authority. The FAR and OMB Circular A-76 define the category, and NASA solicitations often list which functions on a given contract are excluded from contractor performance for this reason.

    Can a small company sell directly to NASA, or does it have to go through a prime?

    Both paths exist. A small company can register in SAM.gov and bid on NASA solicitations directly, including ones set aside for small businesses. Many companies also enter through subcontracting to an established prime, which is usually the faster route to a first award. See the chapters on SAM.gov registration and subcontracting for the mechanics of each path.

    Who actually decides what NASA buys?

    Program and project offices at the NASA centers define technical requirements. Contracting officers, who hold legal authority to obligate government funds, translate those requirements into solicitations and administer the resulting contracts. Neither role substitutes for the other; a contracting officer cannot award without a validated requirement, and a program office cannot commit funds without the contracting officer.

    All Chapters

    This guide is published as a public reference on federal acquisition practice. It is educational in nature, reflects publicly available regulation and agency guidance, and is not legal advice. Regulations change; verify current requirements against the FAR, the NASA FAR Supplement, and the governing solicitation. Monarch Space Systems makes no representation regarding any specific procurement.

    Last Updated: August 19, 2026

    Author: Business Development Division, Monarch Space Systems

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