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

The two real paths a small contractor chooses between

Almost every small aerospace and defense contractor lands on one of two stack archetypes, and the choice is made for them by what they sell rather than by preference. The first archetype is the parts-and-hardware path: a machine shop, fabricator, or component supplier selling mostly firm-fixed-price work to primes. Its center of gravity is the shop floor and the quality system. The second is the services-and-engineering path: a labor-heavy contractor billing cost-reimbursable or T&M work directly to a government agency. Its center of gravity is cost accounting and indirect rates.

The hardware path builds around an AS9100-native manufacturing ERP — ProShop ERP is the popular choice for precision machine shops because document control, nonconformance and CAPA workflows, first-article inspection (FAI/AS9102), and material traceability are native rather than bolted on. Epicor Kinetic, Global Shop Solutions, and E2/Shoptech are the alternates as size and process diversity increase. On this path, accounting can stay lighter for longer: QuickBooks configured for job costing paired with ICAT (Indirect Cost Allocation Tool), or PROCAS as a purpose-built small-contractor package, is genuinely defensible while the work is FFP.

The services path inverts that. There is no shop floor, so the manufacturing ERP disappears entirely and the govcon financial system becomes the whole spine. Deltek Costpoint or Unanet GovCon is not optional here, because cost-reimbursable work forces project and contract cost segregation, indirect rate pools and bases (fringe, overhead, G&A), compliant labor distribution, and annual incurred-cost submissions. The Defense Contract Audit Agency can review the accounting system, and an inadequate system means you cannot hold cost-reimbursable work — the revenue simply stops being available to you.

What both paths share is the compliance enclave. Any contractor touching Controlled Unclassified Information must meet NIST SP 800-171 and, under CMMC 2.0, carry the appropriate certification level — commonly Level 2 with third-party (C3PAO) assessment for CUI work. DFARS 252.204-7012 adds flow-down, incident reporting, and adequate-security obligations. Layer ITAR and EAR export-control rules on technical data and the practical result is identical for both archetypes: email, file storage, identity, and engineering data must sit in a U.S.-person-only, sovereign environment. That is why Microsoft GCC High and PreVeil show up on the hardware shop and the services contractor alike.

The mistake is assuming you must pick one path permanently. A machine shop that wins an SBIR or an engineering services task order suddenly needs Costpoint-grade rate accounting; a services contractor that acquires a fabrication capability suddenly needs AS9100. Choose the archetype that matches your current contract mix, but pick vendors that do not trap you when the mix shifts.

How to decide between the two stacks

The decision is driven by four questions, answered in order. Getting the order right matters, because each answer constrains the next.

Question one: does CUI touch your systems today? If you hold any contract with DFARS 252.204-7012 flow-down, or receive drawings, specs, or technical data marked CUI, the enclave decision comes first and everything else installs inside or around it. Do not select an ERP, a PLM, or a CRM before you know your CUI boundary — retrofitting a boundary around already-deployed tools is the single most expensive rework in this sector.

Question two: what is your contract type mix? Pure FFP with no cost-reimbursable exposure means QuickBooks plus ICAT or PROCAS is legitimately adequate. The moment you win your first cost-reimbursable, T&M, or CPFF award — or hold more than two concurrent contracts with distinct indirect treatment — the trigger to move to Costpoint or Unanet has fired. The trigger is contract type, not headcount and not revenue.

Question three: do you make physical parts? If yes, the AS9100 manufacturing ERP is your second-largest spend and your highest-risk implementation. If no, skip it entirely and put the money into capture and rate accounting instead.

Question four: how engineered are the parts? Simple build-to-print machining can often live inside ProShop's own document and revision control. Complex assemblies with multi-level BOMs, effectivity dates, and frequent engineering change orders need real PLM — Arena PLM for cloud-native speed, PTC Windchill for heavyweight program-level change control, Siemens Teamcenter if you are already standardized on Siemens CAD.

A practical tiebreaker when two options both look viable: weight implementation risk over feature breadth. Costpoint has the deepest govcon feature set and the largest consultant ecosystem, which matters if you expect CAS-covered work. Unanet ships a faster, cleaner implementation with built-in timekeeping and is usually the better fit for a small-business contractor that wants to be live in a quarter rather than a year. JAMIS Prime is a credible cloud-native third option for services-heavy shops. The wrong answer is the one your team abandons halfway through configuration.

Concrete numbers behind each option

Budgets in this sector cluster into three tiers, and the jump between tiers is driven by contract type and CUI scope more than by employee count.

Micro contractor, roughly 1–15 people, mostly FFP, early CUI exposure. QuickBooks Online or Desktop with job costing plus ICAT, or PROCAS as an integrated alternative, typically lands in the $100–$600/month range all-in for accounting and timekeeping. PreVeil sits around $30–$40/user/month and lets you scope the assessment boundary down to only the systems that touch CUI rather than lifting the whole company into GCC High. A light MSP engagement for CMMC scoping and System Security Plan work — Summit 7 is the best-known govcon-focused provider — starts around $3,000/month. Add ProShop ERP at roughly $1,000–$5,000/month by seat count only if you machine parts, SolidWorks near $2,800/seat/year, Mastercam comparable by module, and SAM.gov free. Total: roughly $1,500–$6,000/month.

Small-business contractor, roughly 15–75 people, mixed FFP and cost-reimbursable, pursuing set-asides. This is where the govcon ERP becomes mandatory. Unanet typically runs $150–$300/user/month; Costpoint runs $200–$400/user/month depending on modules and implementation scope, with timekeeping and labor distribution bundled into the per-user fee in both cases. GCC High licensing is roughly $40–$70/user/month, and a managed MSP engagement scales to $3,000–$20,000/month by size and control coverage. A GRC platform — Vanta or Hyperproof, both of which now ship NIST 800-171 and CMMC frameworks — runs $10,000–$40,000/year by headcount and converts the annual evidence scramble into a maintained posture. Arena PLM is roughly $75–$150/user/month. GovWin IQ for a small seat package is roughly $10,000–$30,000/year. CRM runs $25–$165/user/month; Responsive or Privia for proposals runs $10,000–$40,000/year. Total: roughly $8,000–$35,000/month.

Mid-size contractor, roughly 75–500+ people, multi-program, prime subcontracts. Costpoint as the financial core, Epicor Kinetic (roughly $175–$300/user/month) or Global Shop Solutions on the floor, PTC Windchill or Teamcenter at enterprise seat pricing often in the $2,000–$4,000/seat/year band, GCC High with a dedicated internal security function rather than a pure MSP model, GovWin IQ with a staffed capture team, and Power BI at roughly $10–$20/user/month on a warehouse for backlog, contract burn, and indirect-rate dashboards. Total: roughly $50,000–$200,000+/month.

Treat all of these as planning ranges, not quotes — govcon software pricing is negotiated, module-dependent, and quoted per implementation. Two numbers routinely get underestimated. First, implementation and configuration services on a govcon ERP frequently rival or exceed the first year of license cost, because indirect rate structure, pool and base design, and contract setup are consulting work, not software installation. Second, CMMC assessment preparation is a multi-quarter effort: documenting 110 NIST 800-171 controls in a System Security Plan with a POA&M, closing gaps, and standing up continuous evidence collection is where small contractors lose the most calendar time and the most unbudgeted money.

The honest framing for an operator: the compliance layer is not a cost center you optimize down. It is the price of admission to the revenue. A contractor that spends $60,000 a year on enclave, GRC, and MSP to stay bid-eligible on CUI work is buying access to contracts it otherwise cannot legally hold.

Where each stack breaks in practice

Four failure modes account for most of the damage, and each is predictable enough to design around.

Treating QuickBooks as a permanent govcon accounting system. A micro contractor wins a cost-reimbursable award, keeps limping along on spreadsheets bolted to QuickBooks, and then cannot produce audit-defensible labor distribution or incurred-cost schedules. The remediation happens under audit pressure, which is the worst possible time to implement an ERP. Set the migration trigger in advance and write it down: first cost-reimbursable award, or second concurrent contract with distinct indirect treatment.

Underscoping the CUI boundary. A contractor assumes its commercial Microsoft 365 tenant is fine, then discovers at assessment time that CUI is sitting in ordinary email, SharePoint sites, engineers' laptops, and a CAD vault nobody inventoried. Migrating to GCC High or PreVeil and re-scoping under an assessment deadline costs multiples of doing it correctly up front. Inventory where CUI actually lands — including the drawings a prime emails your estimator — before you bid CUI work, not after.

Buying PLM and an AS9100 ERP that do not talk. Engineering manages BOMs and revisions in one system while the floor builds from a different, stale BOM. The result is parts built to a superseded revision, FAI failures, nonconformances, and in the worst case an escape to the customer. The PLM-to-shop-floor handoff — Arena or Windchill releasing a controlled BOM into ProShop or Epicor — has to be a deliberate, tested integration with a defined release gate, not two systems that happen to coexist.

Running capture out of spreadsheets. Without disciplined opportunity tracking, the BD team finds solicitations too late, misjudges which set-aside vehicles it can pursue (8(a), SDVOSB, HUBZone, WOSB), and assembles a compliance matrix in a last-week panic. Government RFPs are unforgiving on format and deadline — a late or non-compliant proposal is discarded regardless of price or technical merit. That is pure lost revenue with no signal back to the team about why.

A fifth, quieter failure: buying every layer at once. A ten-person shop that simultaneously implements an ERP, a PLM, a GRC platform, and a proposal tool will finish none of them. Sequence deliberately.

Implementation details and sequencing

Sequence around dependencies, not around which vendor is easiest to buy. Compliance and accounting come first because everything else installs inside their boundaries.

Days 0–30 — foundation. Start with a CUI inventory, not a vendor demo. Walk every inbound channel: prime-supplied drawings, RFP attachments, quality records, and CAD files. Draw the assessment boundary tight, then stand up the enclave and migrate CUI off commercial tools before anyone touches a new system. In parallel, select the govcon ERP. If you are pure FFP and micro, formally confirm QuickBooks plus ICAT with your accountant and document the decision — a documented, deliberate choice survives scrutiny far better than a default.

Days 31–60 — cost and quality. Indirect rate structure is the hardest part of a govcon ERP implementation and the part most often rushed. Design your fringe, overhead, and G&A pools and their allocation bases with someone who has defended rates before, then configure timekeeping to DCAA expectations: daily entry, total-time accounting, immutable audit trails, and supervisor approval. Both Costpoint and Unanet ship compliant timekeeping that flows labor straight into cost accounting, which is why standalone timekeeping rarely earns its keep once you are on a real govcon ERP. If you manufacture, this is also when the AS9100 ERP goes in — document control, nonconformance and CAPA, FAI/AS9102 — and when you wire the PLM release gate so the floor can only build from a controlled revision.

Days 61–90 — capture and reporting. Now turn on the demand side. SAM.gov registration and solicitation monitoring is mandatory and free, but it only shows what has already been posted. GovWin IQ earns its cost by surfacing forecasted and pre-solicitation work months earlier along with incumbents, teaming partners, and award history — that is where capture actually happens, before the RFP hits the street. Pair it with a CRM holding accounts, teaming relationships, and the capture-to-proposal handoff, and a proposal tool (Responsive or Privia) carrying a reusable content library, compliance matrix templates, and color-team review workflow. Close the quarter with a mock DCAA accounting-system review and an AS9100 internal audit so you find gaps on your schedule rather than an auditor's.

Two integration details that repay the effort. Keep CUI-adjacent reporting inside the enclave — Power BI is the natural BI choice largely because the data never has to leave the GCC High tenant to be visualized. And treat the CAD-to-PLM-to-shop chain as one governed pipeline: SolidWorks and Mastercam feeding a PLM that releases to ProShop or Epicor, with revision effectivity enforced at the release gate rather than by convention.

Related questions

When exactly should we move off QuickBooks to Costpoint or Unanet?

At your first cost-reimbursable, T&M, or CPFF award, or when you hold a second concurrent contract with distinct indirect treatment. Not at a revenue milestone. The manual workarounds stop being audit-defensible before they stop being convenient.

Is PreVeil enough for CMMC Level 2, or do we need GCC High?

PreVeil can satisfy Level 2 for a tightly scoped boundary covering only CUI email and files. GCC High is warranted when CUI touches broad collaboration, identity, SharePoint, and CAD data across the whole organization.

Do we need a separate PLM if our manufacturing ERP already tracks a BOM?

A manufacturing ERP tracks the production BOM; PLM governs the engineering configuration — revisions, change orders, effectivity, CAD links. Simple build-to-print shops can live inside ProShop alone. Multi-level engineered assemblies need real PLM.

Can a small aerospace and defense contractor skip GovWin IQ?

Yes, if you subcontract to primes through relationships rather than bidding prime opportunities. SAM.gov plus disciplined teaming works. GovWin IQ pays off once you pursue prime awards and need pre-solicitation visibility.

What is the first thing to buy with a limited budget?

The compliance enclave, if you touch CUI. It gates bid eligibility, and retrofitting a boundary around already-deployed tools is the most expensive rework in this sector.

FAQ

Do I really need Deltek Costpoint, or can I run defense work on QuickBooks?

You can legitimately start a micro, FFP-only contractor on QuickBooks plus ICAT or PROCAS and produce defensible indirect rates and incurred-cost schedules. The problem is durability, not legitimacy. Once you hold cost-reimbursable work or multiple concurrent contracts with different indirect treatments, the spreadsheet layer between QuickBooks and your rate calculations becomes the weak point in an accounting-system review. Move on contract type, not on revenue.

What does CMMC 2.0 Level 2 actually require from the stack?

Level 2 aligns to the 110 NIST SP 800-171 controls and, for most CUI work, requires third-party assessment by a C3PAO. Practically that means a compliant enclave (GCC High or PreVeil), a documented System Security Plan with a POA&M tracking open gaps, continuous evidence collection through a GRC tool like Vanta or Hyperproof, and usually an MSP such as Summit 7 to configure and maintain controls. It is a maintained posture, not a one-time project.

How do ITAR and EAR change software selection?

Export-control rules restrict access to technical data to U.S. persons and can require U.S. data residency. That eliminates commercial cloud tenants storing data abroad or granting foreign-national administrative access — including support staff. It is why contractors move email, file storage, and CAD/PLM data into GCC High or equivalent U.S.-sovereign environments and federate supply-chain identity through platforms like Exostar when collaborating with primes.

What is the realistic implementation timeline for a govcon ERP?

Unanet implementations for a small-business contractor commonly land in a quarter; Costpoint with meaningful module scope typically runs longer, especially where indirect rate structure needs redesign. The variable is rarely the software — it is how clean your pool and base design, contract setup, and historical data are. Budget consulting effort comparable to first-year license cost and treat rate design as the critical path.

Does an AS9100 ERP replace a dedicated quality management system?

For most small precision shops, yes. ProShop and comparable AS9100-native systems ship document control, nonconformance and CAPA, FAI/AS9102, calibration, and supplier quality inside the ERP, which is exactly why shops choose them over generic manufacturing ERPs plus a separate QMS. Larger multi-site operations with several certifications sometimes still layer a dedicated QMS on top.

How much of this stack can one person actually administer?

Accounting, CRM, and proposal tooling are administrable by a capable ops generalist. The enclave is not — CMMC control maintenance, evidence collection, and incident response realistically need an MSP or a dedicated security hire even at 30 people. Plan for the enclave to be the one layer you outsource, and keep the ERP and capture layers in-house where the domain knowledge lives.

Sources

• https://csrc.nist.gov/pubs/sp/800/171/r3/final
• https://dodcio.defense.gov/CMMC/
• https://www.acquisition.gov/dfars/252.204-7012-safeguarding-covered-defense-information-and-cyber-incident-reporting
• https://www.dcaa.mil/
• https://sam.gov/
• https://www.deltek.com/en/products/project-erp/costpoint
• https://unanet.com/erp/government-contractors
• https://www.sae.org/standards/content/as9100d/
• https://www.pmddtc.state.gov/
• https://learn.microsoft.com/en-us/microsoft-365/enterprise/microsoft-365-us-government-gcc-high

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