What is the best tech stack for a small aerospace and defense contractor in 2027?

Direct Answer

The best tech stack for a small aerospace and defense contractor in 2027 is built around a DCAA-compliant government-contract ERP and accounting core (Deltek Costpoint or Unanet GovCon for small-business contractors, QuickBooks plus ICAT for micro shops), wrapped in a CMMC 2.0 / NIST 800-171 compliance enclave (Microsoft GCC High or PreVeil with an MSP like Summit 7), an AS9100 manufacturing and quality layer (ProShop ERP or Epicor Kinetic plus PTC Windchill or Arena PLM for configuration control), and a capture and proposal engine (GovWin IQ, SAM.gov, and a govcon CRM feeding a proposal tool like Responsive).

Unlike a commercial business, a defense contractor's tech stack is not chosen for growth velocity — it is chosen because government-contract cost accounting, cybersecurity compliance, and engineering traceability are legal prerequisites to win and keep contracts. Get the accounting and CMMC layers wrong and you cannot bid; get the quality and PLM layers wrong and you fail your first AS9100 audit or first-article inspection.

The right tech stack treats compliance as the foundation and bolts capture and manufacturing on top.

TL;DR

• Accounting core: Deltek Costpoint or Unanet GovCon (DCAA-compliant cost accounting, indirect rates, labor distribution); QuickBooks + ICAT for the smallest contractors.
• Compliance enclave: Microsoft GCC High (M365 / Azure Government) or PreVeil for CMMC 2.0 / NIST 800-171 / DFARS / ITAR, fronted by an MSP such as Summit 7 and a GRC tool like Vanta or Hyperproof.
• Manufacturing & quality: ProShop ERP, Epicor Kinetic, or Global Shop Solutions for AS9100 shops; PTC Windchill, Arena PLM, or Siemens Teamcenter for configuration control and FAI/AS9102.
• Capture & proposals: GovWin IQ (Deltek) plus SAM.gov for opportunity intel, a govcon CRM, and Responsive or Privia for proposals.
• Budget: roughly $1,500-$6,000/month for a micro contractor, $8,000-$35,000/month for a small-business contractor, and $50,000-$200,000+/month for a mid-size A&D contractor.

Why the Small Aerospace & Defense Contractor Tech Stack Works Differently

1. Government-contract accounting is non-negotiable and drives the whole ERP choice. A commercial company picks accounting software for invoicing and payroll. A defense contractor on cost-reimbursable or FFP contracts must run a DCAA-compliant cost accounting system: project and contract cost segregation, indirect rate pools and bases (fringe, overhead, G&A), labor distribution from a compliant timekeeping system, and incurred-cost submissions. The Defense Contract Audit Agency can pull your records, and a failed accounting-system review means you cannot hold cost-reimbursable work. This single requirement is why Deltek Costpoint and Unanet dominate this sector — generic ERPs simply do not segregate cost the way the FAR and CAS demand.

1. Cybersecurity compliance is a gate to bid, not a nice-to-have. Any contractor touching Controlled Unclassified Information (CUI) must meet NIST 800-171 and, under CMMC 2.0, carry the right certification level — often Level 2 with a third-party assessment. DFARS 252.204-7012 mandates flow-down, incident reporting, and adequate security. Add ITAR and EAR export-control obligations for technical data, and the result is that email, file storage, and engineering data must live in a U.S.-person-only, FedRAMP-aligned enclave. This is why contractors move to Microsoft GCC High or PreVeil instead of commercial Microsoft 365 — commercial tenants do not meet the CUI handling bar.

1. Quality, traceability, and configuration control are how engineered parts pass audit. A&D parts carry life-and-safety consequences, so the quality system is heavyweight. AS9100 certification requires document control, nonconformance and CAPA workflows, first-article inspection (FAI / AS9102), full material and process traceability, and supplier quality management. Engineered components need PLM-grade configuration control — every revision, every change order, every effectivity tracked. A machine-shop ERP that bakes in AS9100 workflows plus a PLM that governs the engineering bill of materials is the difference between passing a customer audit and losing the qualification.

1. Capture and BD is the sales engine, and it runs on government opportunity data. A defense contractor does not generate demand with ads and webinars — it finds and bids government opportunities. That means monitoring SAM.gov, tracking forecasted and pre-solicitation work in GovWin IQ, qualifying which vehicles and set-asides (8(a), SDVOSB, HUBZone) it can pursue, and running a disciplined proposal process against tight RFP deadlines. The capture pipeline plus a structured proposal tool is the revenue operations function of this industry, even though almost none of it looks like a commercial sales funnel.

The Core Stack, Layer by Layer

Government-Contract ERP & Accounting — Deltek Costpoint (alternates: Unanet GovCon, JAMIS Prime). The DCAA-compliant system of record for project cost, indirect rates, labor distribution, billing, and incurred-cost reporting. Costpoint wins for small-to-mid contractors that expect to grow into cost-reimbursable and CAS-covered work and want the deepest govcon feature set and the largest consultant ecosystem.

Unanet GovCon wins for small-business contractors that want a faster, cleaner implementation and tight project accounting without Costpoint's weight. JAMIS Prime is a strong cloud-native alternative for services-heavy contractors. Costpoint runs roughly $200-$400/user/month depending on modules and implementation; Unanet is typically $150-$300/user/month.

Entry-Level Accounting — QuickBooks plus ICAT (alternate: PROCAS). For micro and early contractors not yet ready for Costpoint, QuickBooks Online or Desktop configured for job costing, paired with ICAT (Indirect Cost Allocation Tool) or SymPro, produces DCAA-defensible indirect rates and incurred-cost schedules at a fraction of the cost.

This is an honest entry option, not a long-term home — once you hold multiple cost-reimbursable contracts, the manual workarounds break. PROCAS is a purpose-built small-contractor accounting and timekeeping package that bridges the gap. Expect $100-$600/month all-in for the smallest contractors.

Timekeeping & Labor Distribution — Deltek Time & Expense / Unanet (built-in). DCAA timekeeping rules are strict: daily entry, total-time accounting, audit trails, and supervisor approvals. Costpoint and Unanet ship compliant timekeeping that flows labor straight into the cost accounting system, which is why standalone timekeeping is rarely worth it once you are on a real govcon ERP.

For QuickBooks shops, PROCAS or a compliant add-on covers it. Usually bundled with the ERP per-user fee.

CMMC 2.0 / NIST 800-171 Compliance Enclave — Microsoft GCC High (alternates: PreVeil, Exostar). The CUI-handling backbone. Microsoft GCC High (Microsoft 365 and Azure Government) provides the email, file storage, and identity enclave that meets NIST 800-171 controls for CUI and supports ITAR data residency.

PreVeil is a lighter, CMMC-ready encrypted email and file system that small contractors deploy to scope down their assessment boundary without lifting the entire org into GCC High. Exostar handles federated identity and supply-chain collaboration with primes. Plan for an MSP — Summit 7 is the best-known govcon-focused managed service and assessment-prep partner — to actually configure and maintain the controls.

GCC High licensing runs roughly $40-$70/user/month; PreVeil is about $30-$40/user/month; MSP engagements add $3,000-$20,000/month by size.

Compliance Management (GRC) — Vanta (alternate: Hyperproof). Continuous evidence collection and control mapping for NIST 800-171, CMMC, and the System Security Plan / POA&M lifecycle. Vanta and Hyperproof both now ship NIST 800-171 and CMMC frameworks, automating the documentation that auditors and C3PAOs demand.

This turns a once-a-year scramble into a maintained posture. Pricing is typically $10,000-$40,000/year by headcount.

Manufacturing ERP & AS9100 Quality — ProShop ERP (alternates: Epicor Kinetic, Global Shop Solutions, E2/Shoptech). For contractors that machine or build parts, this layer runs the shop floor, scheduling, traceability, and the AS9100 quality management system in one place. ProShop ERP is the popular AS9100-native choice for precision machine shops — it is paperless, bakes in document control, FAI/AS9102, and nonconformance workflows, and is built around quality from the ground up.

Epicor Kinetic and Global Shop Solutions suit larger or more diverse manufacturers needing deeper MES and planning; E2/Shoptech fits smaller job shops. ProShop runs roughly $1,000-$5,000/month by seat count; Epicor Kinetic is $175-$300/user/month.

PLM & Configuration Control — PTC Windchill (alternates: Arena PLM, Siemens Teamcenter). Governs the engineering bill of materials, revisions, change orders, and effectivity — the configuration-managed source of truth for engineered products. PTC Windchill is the heavyweight standard for complex A&D programs needing rigorous change control and CAD integration.

Arena PLM is the cloud-native, faster-to-deploy option that small and mid contractors favor for managing parts, BOMs, and quality records together. Siemens Teamcenter fits shops already standardized on Siemens CAD. Windchill and Teamcenter are enterprise-priced (often $2,000-$4,000/seat/year); Arena is roughly $75-$150/user/month.

Capture, BD & Opportunity Intelligence — GovWin IQ (alternates: SAM.gov, Bloomberg Government). The market intelligence and pipeline layer. GovWin IQ (Deltek) tracks forecasted, pre-solicitation, and active federal and SLED opportunities, teaming partners, and incumbents — it is the pipeline-of-record for serious capture teams.

SAM.gov is the free, mandatory registration and solicitation source every contractor must monitor. Bloomberg Government is an alternate intel source. GovWin IQ runs roughly $10,000-$30,000/year per a small seat package.

Govcon CRM & Proposal Management — Salesforce plus Responsive (alternates: Privia, HubSpot, RFPIO). A CRM tracks accounts, opportunities, teaming relationships, and the capture-to-proposal handoff. Salesforce with a govcon configuration (or a lighter HubSpot for smaller shops) holds the pipeline; Responsive (formerly RFPIO) or Privia manages the structured, deadline-driven proposal process with content libraries, compliance matrices, and color-team reviews.

CRM runs $25-$165/user/month; proposal tools run $10,000-$40,000/year.

CAD/CAM & Engineering — SolidWorks plus Mastercam (alternate: Siemens NX). The design and machining toolchain feeding PLM and the shop floor. SolidWorks is the dominant mechanical CAD for A&D parts suppliers; Mastercam drives the CNC toolpaths. These integrate into ProShop or Epicor and push the controlled BOM into Windchill or Arena.

SolidWorks runs about $2,800/seat/year; Mastercam is similar by module.

Business Intelligence — Microsoft Power BI (alternate: Tableau). Indirect-rate tracking, contract burn, backlog, proposal win-rate, and on-time-delivery reporting. Power BI is the natural fit since most of this sector already lives in the Microsoft GCC High tenant, keeping CUI-adjacent reporting inside the enclave.

Roughly $10-$20/user/month.

Real Operators & What They Run

• A 35-person precision machine shop supplying primes — runs ProShop ERP for paperless AS9100 manufacturing, quality, and traceability, with QuickBooks plus ICAT for job costing and indirect rates while it is still mostly FFP work, PreVeil plus a Summit 7 engagement for CMMC Level 2 scoping, SolidWorks and Mastercam on the engineering side, and SAM.gov plus occasional teaming for new work. A lean, quality-first stack.

• A 120-person defense services and engineering contractor — built on Deltek Costpoint for cost-reimbursable project accounting, indirect rates, and incurred-cost submissions, with Deltek Time & Expense for DCAA timekeeping, Microsoft GCC High managed by an MSP for CUI, GovWin IQ driving the capture pipeline, Salesforce for the BD relationship map, and Responsive for proposals. Almost no manufacturing — all labor and compliance.

• A 250-person mid-size A&D subcontractor to primes — runs Deltek Costpoint for the financial core, Epicor Kinetic on the manufacturing floor, PTC Windchill for configuration control across multiple programs, Microsoft GCC High as the compliance enclave with a dedicated security team, GovWin IQ and a full capture organization, and Power BI for contract-burn and indirect-rate dashboards. A warehouse and BI layer tie it together.

• An 8(a) / SDVOSB small-business contractor — uses Unanet GovCon for fast project accounting and built-in timekeeping, PreVeil plus Vanta for a scoped-down CMMC and NIST 800-171 posture, GovWin IQ focused on set-aside opportunities, HubSpot for a lightweight CRM, and Privia for proposal management. Optimized to win set-aside work quickly without enterprise overhead.

• A defense-tech hardware startup — pairs QuickBooks plus ICAT (moving toward Unanet) for early govcon accounting, Arena PLM for cloud-native BOM and change control, Microsoft GCC High from day one to handle CUI on OTAs and SBIR/STTR work, SolidWorks for design, and SAM.gov plus relationships for early contracts. Built to scale compliance before it scales revenue.

Integration Architecture

The defense-contractor tech stack is organized around two data spines: the financial and compliance spine that governs cost, labor, and CUI, and the engineering-to-shop-floor spine that governs design, configuration, and quality. Everything must respect the CMMC enclave boundary — CUI cannot leak into commercial tools.

Failure Modes

1. Treating QuickBooks as a permanent govcon accounting system. A micro contractor wins one cost-reimbursable contract, keeps limping along on spreadsheets bolted to QuickBooks, then fails a DCAA accounting-system review and loses the ability to hold the work. QuickBooks plus ICAT is a valid starting point, but the trigger to move to Costpoint or Unanet is the first cost-reimbursable award or the second active contract — not some revenue milestone.

1. Underscoping the CMMC enclave and discovering CUI everywhere. A contractor assumes its commercial Microsoft 365 tenant is fine, then learns at assessment time that CUI is sitting in regular email, SharePoint, and engineers' laptops. The remediation — migrating to GCC High or PreVeil and re-scoping the boundary under deadline — is far more expensive than building the enclave correctly up front. Scope the CUI boundary before you bid CUI work.

1. Buying PLM and an AS9100 ERP that do not talk to each other. The engineering team manages BOMs and revisions in one system while the shop floor builds from a different, stale BOM. The result is parts built to the wrong revision, FAI failures, and nonconformances. The PLM-to-MES handoff (Windchill or Arena into ProShop or Epicor) has to be a deliberate integration, not two islands.

1. Running capture out of spreadsheets and missing deadlines. Without GovWin IQ and a disciplined proposal tool, the BD team finds opportunities too late, misqualifies set-asides, and assembles compliant proposals in a last-week panic. Government RFPs are unforgiving on format and deadline — a non-compliant or late proposal is simply discarded, no matter how good the price.

Budget & Sizing

Micro / startup contractor (1-15 people, mostly FFP, early CUI exposure). QuickBooks plus ICAT or PROCAS for accounting, PreVeil plus a light Summit 7 engagement for CMMC scoping, ProShop ERP if machining or none if pure services, SolidWorks and Mastercam as needed, SAM.gov for opportunities, and Vanta for compliance evidence.

Roughly $1,500-$6,000/month all-in.

Small-business contractor (15-75 people, mixed FFP and cost-reimbursable, set-asides). Unanet GovCon or Deltek Costpoint with built-in timekeeping, Microsoft GCC High or PreVeil managed by an MSP, ProShop or Epicor Kinetic for manufacturing, Arena PLM for configuration control, GovWin IQ for capture, a CRM, and Privia or Responsive for proposals.

Roughly $8,000-$35,000/month.

Mid-size A&D contractor (75-500+ people, multi-program, prime subcontracts). Deltek Costpoint as the financial core, Epicor Kinetic or Global Shop Solutions on the floor, PTC Windchill for configuration control across programs, Microsoft GCC High with a dedicated security and compliance function, GovWin IQ with a staffed capture team, Responsive for proposals, and Power BI on a warehouse for backlog and indirect-rate reporting.

Roughly $50,000-$200,000+/month.

30/60/90 Day Implementation Plan

Days 0-30 — Build the compliance and accounting foundation. Scope exactly where CUI lives and define the assessment boundary. Stand up the GCC High or PreVeil enclave and migrate CUI off commercial tools. Select and begin implementing the govcon ERP — Costpoint or Unanet if you hold cost-reimbursable work, QuickBooks plus ICAT if you are still micro and FFP.

Days 31-60 — Stand up cost and quality systems. Configure indirect rate pools and bases and compliant timekeeping so labor flows into project cost. If you manufacture, implement the AS9100 ERP (ProShop or Epicor), set up document control, nonconformance, and FAI/AS9102 workflows, and connect the PLM (Windchill or Arena) so the shop builds from the controlled BOM.

Days 61-90 — Turn on capture and reporting. Deploy GovWin IQ and the CRM so the BD team works a real pipeline, stand up the proposal tool with a content library and compliance-matrix template, and build Power BI dashboards for indirect rates, contract burn, backlog, and on-time delivery. Run a mock DCAA and AS9100 readiness check.

FAQ

Do I really need Deltek Costpoint, or can I run a defense contract on QuickBooks? You can start a micro, FFP-only contractor on QuickBooks plus ICAT and produce DCAA-defensible indirect rates. But the moment you win cost-reimbursable work or hold more than one or two active contracts, the manual workarounds stop being audit-defensible.

The trigger to move to Costpoint or Unanet is the first cost-reimbursable award, not a revenue threshold.

What is the difference between GCC High and PreVeil for CMMC compliance? GCC High is a full Microsoft 365 and Azure Government enclave — email, files, identity, and collaboration in a U.S.-sovereign environment that handles CUI and ITAR data. PreVeil is a lighter, CMMC-ready encrypted email and file layer that lets a small contractor scope its assessment boundary down to just the system handling CUI, without migrating the whole organization.

Small shops often pick PreVeil; larger contractors standardize on GCC High.

Do I need a separate PLM if my ERP already manages a bill of materials? A manufacturing ERP tracks the production BOM, but a PLM governs the engineering configuration — revisions, change orders, effectivity, and CAD links. For complex engineered parts under AS9100, you want the PLM (Windchill or Arena) as the source of truth for configuration and the ERP to consume the released BOM.

Very simple machine shops can sometimes live inside an AS9100 ERP like ProShop alone.

How important is GovWin IQ if SAM.gov is free? SAM.gov is mandatory and free, but it only shows posted solicitations. GovWin IQ shows forecasted and pre-solicitation opportunities months earlier, plus incumbents, teaming partners, and award history — which is where real capture happens.

SAM.gov is necessary; GovWin IQ is what lets you shape opportunities before they hit the street.

What does CMMC 2.0 Level 2 actually require in the tech stack? Level 2 aligns to the 110 NIST 800-171 controls, typically verified by a third-party assessor (C3PAO) for CUI work. In practice that means a compliant enclave (GCC High or PreVeil), documented controls in a System Security Plan with a POA&M, continuous evidence collection (Vanta or Hyperproof), and usually an MSP like Summit 7 to maintain it.

It is a maintained posture, not a one-time project.

How do export controls like ITAR change my software choices? ITAR and EAR restrict access to technical data to U.S. Persons and can require data residency in the United States. That rules out commercial cloud tenants that store data abroad or grant foreign-national admin access, which is exactly why contractors move email, file storage, and CAD/PLM data into GCC High or other U.S.-sovereign environments and lock down identity through tools like Exostar.

Sources

• Deltek — Costpoint government-contract ERP modules, DCAA cost accounting, and indirect-rate guidance (2026).
• Unanet — GovCon ERP and A&E project accounting, built-in timekeeping, and pricing overview (2026).
• U.S. Department of Defense — CMMC 2.0 program model and Level 2 assessment requirements (2025).
• NIST — Special Publication 800-171 Rev. 3 controls for protecting Controlled Unclassified Information (2025).
• Defense Contract Audit Agency — accounting-system adequacy and incurred-cost submission guidance (2026).
• ProShop ERP — AS9100-native manufacturing, quality, and FAI/AS9102 workflow documentation (2026).
• PTC and Arena — Windchill and Arena PLM configuration-management and change-control product guides (2026).
• Summit 7 — CMMC and NIST 800-171 managed services and GCC High migration practices (2027).
• SAM.gov and Deltek GovWin IQ — federal opportunity registration, solicitation, and capture-intelligence sources (2027).