Compare 14 government cloud services partners delivering programmes for US federal, state, and local agencies and for allied government buyers on AWS GovCloud, Azure Government and Azure Government Secret, Google Cloud Assured Workloads for Government, and Oracle Government Cloud. Engagements cover the FedRAMP authorisation path across Low, Moderate, and High baselines, the DoD Impact Level workloads from IL2 through IL5 and IL6, the StateRAMP and TX-RAMP programmes for state authorisations, the migration of legacy mainframe and AS/400 workloads into FedRAMP-authorised environments, the zero-trust architecture aligned to OMB M-22-09, the Continuous ATO and OSCAL-driven assessment programmes, the sovereign-cloud workstreams for partners such as Microsoft Cloud for Sovereignty and Google Cloud Sovereign Solutions, and the cross-domain and classified-network integrations. Listings cover federal SIs, Big Four government practices, FedRAMP-authorised cloud SIs, and the systems-engineering specialists. No partner pays for placement on this directory.
Government cloud programmes break into four typical workstreams. Authorisation strategy, where the partner picks the FedRAMP baseline (Low, Moderate, High), aligns to the agency authorising official's expectations, sets the OSCAL-driven evidence pipeline, and plans the path from PreATO through ATO to Continuous ATO. Cloud architecture and migration, where the partner designs the AWS GovCloud, Azure Government, Google Assured Workloads, or Oracle Government Cloud landing zone, configures the FIPS 140-2 or 140-3 validated services, the cross-domain solutions where classification boundaries are involved, and runs the migration from on-premises and legacy mainframe estates. Zero trust and security, where the partner aligns the architecture to OMB M-22-09 and the CISA zero-trust maturity model, builds the identity, devices, network, applications, and data pillars, integrates ICAM (Identity, Credential, and Access Management) standards, and implements the continuous monitoring (ConMon) routines required for ATO maintenance. Operations and compliance, where the partner runs the System Security Plan maintenance, the Plan of Action and Milestones (POA&M) workflow, the contingency planning and incident response, the supply-chain risk management aligned to NIST 800-161 and the FedRAMP authorising regulations, and the trusted-internet-connection (TIC 3.0) integration.
Three procurement archetypes recur. Federal SIs (Accenture Federal, Leidos, Booz Allen, GDIT, SAIC, CACI, Maximus, CGI Federal) lead on prime contracts where past performance, security clearances, and contract-vehicle access (GSA MAS, GWAC, Alliant 2, OASIS+) are required. Big Four government practices (Deloitte, EY, KPMG) lead on civilian-agency programmes blending advisory, audit, and implementation, especially on financial-management and citizen-services modernisations. Cloud-specialist boutiques (Stratus, Redhorse) lead on focused FedRAMP A&A, OSCAL automation, and DevSecOps engineering where deep engineering craft beats programme scale. Friction point: federal cloud programmes carry contract-vehicle constraints, security-clearance requirements, and FedRAMP authorisation timelines (often 12-18 months for first authorisation) that delay programmes built on commercial timelines. Buyers expecting commercial-cloud velocity routinely under-budget the authorisation runway and the FedRAMP 3PAO assessment costs.
For complementary research see govtech platforms, zero-trust platforms, GRC platforms, CSPM tools, and ICAM platforms. For adjacent services see FedRAMP advisory, zero-trust consulting, AWS consulting partners, Azure consulting partners, public sector IT consulting, and CMMC compliance services.
Tell us what you're evaluating and we'll send a tailored shortlist of vendors that actually fit — no vendor funding, no pay-to-play.
6,000+ vendors · 893 comparisons · 48 country guides · Independent & vendor-neutral