Computer Systems Design and Related Services (U.S.) — NAICS 5415

A short rollup primer for one level of the U.S. industry classification. Written for both public-market and private investors. NAICS = North American Industry Classification System, the standard code set U.S. statistical agencies use to group businesses; IT = information technology; AI = artificial intelligence, computer systems performing tasks that normally require human judgment.

1. Overview

NAICS 5415 — Computer Systems Design and Related Services — is the "industry group" (the 4-digit level) that sits directly under subsector 5416 in the professional-services family and directly above the detailed IT-services codes. In plain terms it is the label the statistical system puts on the whole U.S. IT-services economy: firms that get paid for the skilled labor of building, designing, running, and advising on other organizations' computer systems — not for selling packaged software or renting cloud capacity, which live in other codes (513210 and 518210).

This is one of the largest professional-services groups in the country — roughly $600.6 billion in annual receipts, about 2.05 million paid employees, and about 145,800 employer locations run by around 125,600 firms.[2][3] The common thread is that this is a people business, not a product business: firms sell expertise billed by the hour, by the project, or by a recurring service fee, which makes the group a fairly direct read on how much corporate America and the U.S. government are spending to build and rebuild their technology.

2. What's inside — and why this level equals its one child

The classification is deliberately layered, and at this particular level the layer adds nothing new. NAICS 5415 contains exactly one child industry: 54151, also named "Computer Systems Design and Related Services." The two codes cover the identical set of firms and dollars — 5415 is simply the 4-digit "industry group" heading and 54151 is the 5-digit "industry" beneath it. Because there is only one child, this page is a pass-through: everything true of 54151 is true of 5415, figure for figure.

The real detail lives one level down. Inside 54151 sit the four 6-digit codes that actually differ in economics and in how you invest:

• 541511 — Custom programming: writing software to a client's order (~$278.5B receipts, ~46% of the group).[4]
• 541512 — Systems design: planning and integrating hardware, software, and networks (~$243.3B, ~41%).[5]
• 541519 — Other computer-related services: IT consulting, disaster recovery, install, security advisory (~$55.0B, ~9%).[7]
• 541513 — Facilities management: running the client's IT or data center for them (~$23.8B, ~4%).[6]

For anything beyond this level's headline figures — the four sub-industries' contrasting concentration, ownership, and investment routes — read the 54151 primer. This page gives only 5415's own rollup numbers and points you there.

3. How big it is

Ground-truth federal figures for this level, taken from our ingested statistics file for 5415. As is standard for this data, these are not one same-year series: receipts and concentration come from the 2022 Economic Census, while employment, payroll, and establishment counts come from 2023 County Business Patterns (CBP).[2][3]

These are the same numbers reported for child 54151, as they must be — the two codes describe the identical population. A few implications: average pay is about $122,000 per employee (payroll ÷ employment), reflecting a workforce of developers, engineers, consultants, and cleared specialists; payroll runs about 42% of receipts, confirming the group is labor-led; and concentration is extraordinarily low — a Herfindahl-Hirschman Index (HHI, a 0–10,000 gauge where anything under ~1,500 counts as "unconcentrated") of just 49.9, with the four largest firms holding only 11% of receipts (CR4 = combined share of the top four firms).[2]

Undercount caveat — read the $600.6 billion as a floor. CBP and the Economic Census count only employer establishments with payroll.[9] Three exclusions all push the true figure higher, and each is largest precisely where small or individual ownership dominates: (1) the many one-person freelance development, install, and consulting operations — tracked separately in Nonemployer Statistics and especially large in custom programming; (2) captive in-house IT built and run inside banks, retailers, and manufacturers, whose primary industry is not IT services; and (3) government IT staff, who are public employees, not private establishments. A fourth distortion is geographic: much work for U.S. clients is delivered from offshore centers and never lands in U.S.-establishment receipts. Our ground-truth file for 5415 carries no nonemployer total, no ownership split, and no margin or utilization figures, so none is invented here.

4. Investable universe — where value concentrates

Because 5415 equals 54151, the investable picture is identical — and covered in full in the child primer. In short: there is no large-cap pure play and no dedicated index fund for this group, and public-company revenue should never be read as market share in any code (the big firms span all four sub-industries plus adjacent ones and earn much of their revenue abroad).

Value on public markets concentrates in the two big sub-industries (custom programming and systems design) and in the federal-facing slice of "other" — not in proportion to the codes' statistical size. Practically, the listed exposure runs across global diversified majors (the scale benchmarks), mid-cap "digital engineering" specialists (the closest thing to a custom-programming pure play), near-pure managed-infrastructure operators, government-focused integrators, and value-added resellers/staffers. By firm count the group is overwhelmingly private and fragmented, and it is one of the most actively consolidated sectors in private equity (PE, firms that buy companies with investor capital and debt to improve and resell them) today. See the 54151 primer, Section 4, for the named companies, tiers, and PE owners.

5. How the money works

The economics are the child's economics. Every firm here sells labor, so revenue is roughly billable headcount × utilization × billing rate, and profit is that revenue minus mostly-labor delivery cost minus overhead. There is little to depreciate, so cash flow tends to be strong and the balance sheet light — the main assets are receivables, people, and (for acquirers) goodwill. The shared levers are utilization (the share of paid hours billed to clients, typically 70–80%), the bill-rate/pay-rate spread delivered across a junior-to-senior "pyramid" from lower-cost geographies (labor arbitrage), and contract type (time-and-materials is low-risk to the firm; fixed-price keeps efficiency gains but eats overruns; recurring managed-services fees are steadier and command higher valuations). Private owners are valued on EV/EBITDA (enterprise value to earnings before interest, taxes, depreciation, and amortization), with small shops around 4–8x and scaled recurring-revenue platforms 11–15x or more — the spread that powers the PE roll-up. The four sub-industries diverge in the detail; see the 54151 primer, Section 5.

6. Demand drivers

Demand is discretionary corporate and government technology spending, so it is cyclical — it expands in confident periods and gets cut fast in downturns. The durable long-run drivers, shared across the whole group: AI adoption (the biggest near-term story, with money flowing to integration — connecting AI to data, workflows, and governance); cloud migration and legacy modernization; enterprise software rollouts (ERP — enterprise resource planning — plus CRM and workflow suites); the AI data-center boom (a specific tailwind for the facilities-management child); cybersecurity, privacy, and resilience; and government IT and defense budgets, a large, steady buyer whose cyclicality is political (appropriations, shutdowns) rather than economic. As a labor-market proxy, the U.S. Bureau of Labor Statistics projects employment of software developers, QA analysts, and testers to grow 15% from 2024 to 2034.[11] Detail in the 54151 primer, Section 6.

7. Regulation

The commercial core is lightly regulated and unlicensed — there is no license to write software, design a system, or run a data center, and no sector-specific regulator. Regulation is driven by the customer, the data, the contract, and the delivery location, and concentrates in two places: government contracting (the FAR/DFARS — Federal Acquisition Regulation and its Defense supplement — plus clearances, FedRAMP cloud authorization, and the phasing-in CMMC cybersecurity certification), and data privacy and security (client-driven regimes such as HIPAA for health data, GLBA for financial data, and the EU's GDPR, plus commercial audits like SOC 2 and ISO 27001). Two cross-cutting forces: immigration policy functions as industry regulation because the group leans on skilled-worker (H-1B) visas, and an emerging AI-governance layer is increasingly written into contracts. Net effect: regulation shapes cost and labor supply more than it gates entry. Full treatment in the 54151 primer, Section 7.

8. Consolidation

The group is hyper-fragmented (HHI 49.9) yet consolidating hard — a contradiction that resolves once you see consolidation is capability-led, not a sign of a concentrating market. Two forces run at once: PE roll-ups (buy a platform, bolt on smaller firms cheaply, exit the combination at a higher multiple — PE was involved in roughly 69% of disclosed managed-service-provider deals in 2025, and take-privates have reached listed names) and strategics buying capability constantly (Accenture alone made roughly 39 acquisitions in 2024).[12][13] Cutting across it all is the hyperscaler and software-vendor ecosystem (AWS, Azure, Google Cloud, SAP, Salesforce, ServiceNow), which both feeds these firms deals and competes with them. Named deals and owners are in the 54151 primer, Sections 4 and 8.

9. Risks

Shared across the group, with different emphasis by sub-industry: AI disruption of the labor-hours model (the defining risk — AI tools can produce the same output with fewer billable hours, so if output decouples from headcount the "bodies × hours" revenue model deflates even as demand for outcomes grows);[14] cyclicality of discretionary spend; federal-budget risk (in 2025 the Department of Government Efficiency effort cancelled or restructured an estimated $85+ billion in federal contracts, targeting large IT integrators);[14] labor cost, attrition, and immigration policy; fixed-price execution overruns; structural cloud cannibalization of legacy facilities-management outsourcing; and client, vendor, and geographic concentration (offshore delivery concentrates single-country and currency exposure). Detail in the 54151 primer, Section 9.

10. How to invest and the outlook

Because 5415 is its one child, the how-to is the child's how-to. Public-market routes: there is no single-industry ETF (exchange-traded fund), so treat the listed companies as differentiated proxies, not a sector basket, and match each to the sub-industries it actually touches — specialists for the custom-build/systems-design core, diversified majors for steadier exposure, near-pure operators for managed infrastructure, government-services names for federal IT (with the budget overhang as the swing factor), and resellers/staffers plus adjacent data-center REITs (real estate investment trusts — a capital-and-power bet, not a labor-services one) to round out the menu. Private-market routes: this is one of the most accessible industries for direct private ownership given the low average firm size — from buying a single small shop or managed-service provider, to backing a PE roll-up platform, to private credit against recurring contract cash flows.

Near-term outlook (forward-looking judgment, not settled fact): high-quality but cyclical exposure to corporate and government technology spending, with an unusually large, still-unresolved question over how AI reshapes its economics. The plausible shape is rising AI-integration and modernization demand and a firm federal cybersecurity/defense base, against genuine pressure on the labor-hours pricing model and higher immigration costs — producing a widening gap between winners (firms that turn AI into higher-value, outcome-priced work) and losers (those selling undifferentiated hours). For the company-level menu, valuation metrics, diligence checklist, and full outlook, read the 54151 primer, Section 10 — it is, at this level, the same industry.

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Sources

This is a single-child rollup; the level equals its one child (54151) and inherits its evidence base. Full source detail — company filings, deal announcements, and market studies — is in the 54151 primer. Listed here are the ground-truth federal statistics for 5415 plus the child-primer references cited above.

1. U.S. Census Bureau, 2022 NAICS — 5415 Computer Systems Design and Related Services and its single child industry 54151 (industry-group structure; cross-references to 513210 / 518210). https://www.census.gov/naics/?details=5415&input=5415&year=2022
2. U.S. Census Bureau, 2022 Economic Census — Concentration of Largest Firms (NAICS 5415): receipts ~$600.6B; 125,645 firms; CR4 11%, CR8 15.7%, CR20 24%, CR50 32.3%; HHI 49.9 (Histometrics ingested ground-truth federal statistics). https://data.census.gov/table/ECNSIZE2022.EC2200SIZECONCEN?n=5415
3. U.S. Census Bureau, County Business Patterns 2023 (NAICS 5415): 145,813 establishments; 2,050,626 employees; ~$250.8B annual payroll; ~$63.5B Q1 payroll (Histometrics ingested ground-truth federal statistics). https://www.census.gov/data/datasets/2023/econ/cbp/2023-cbp.html
4. Histometrics child primer, NAICS 541511 Custom Computer Programming Services — receipts ~$278.5B (~46% of level).
5. Histometrics child primer, NAICS 541512 Computer Systems Design Services — receipts ~$243.3B (~41% of level).
6. Histometrics child primer, NAICS 541513 Computer Facilities Management Services — receipts ~$23.8B (~4% of level).
7. Histometrics child primer, NAICS 541519 Other Computer Related Services — receipts ~$55.0B (~9% of level).
8. Histometrics rollup primer, NAICS 54151 Computer Systems Design and Related Services — the full-detail parent of this page (investable universe, economics, regulation, consolidation, risks, and how-to-invest for all four sub-industries).
9. U.S. Census Bureau, County Business Patterns methodology (employer-only coverage) and Nonemployer Statistics (freelance/sole-proprietor firms tracked separately). https://www.census.gov/programs-surveys/cbp/technical-documentation/methodology.html
10. Bain & Company, From Pilots to Payoff: Generative AI in Software Development, Technology Report 2025. https://www.bain.com/insights/from-pilots-to-payoff-generative-ai-in-software-development-technology-report-2025/
11. U.S. Bureau of Labor Statistics, Software Developers, QA Analysts, and Testers: Occupational Outlook Handbook (+15% employment 2024–2034), 2025. https://www.bls.gov/ooh/computer-and-information-technology/software-developers.htm
12. Accenture plc, Fiscal 2025 Annual Report (~39 acquisitions in 2024; advanced-AI bookings). https://www.accenture.com/us-en/about/company/annual-report
13. Solganick, Technology Services and IT Consulting M&A Update (~69% PE share of 2025 MSP deals). https://solganick.com/industry-sectors/technology-services-msp-mergers-acquisitions/
14. GovSpend / Washington Technology, DOGE contract terminations in FY2025 (~$85B+; targeted IT integrators), 2025. https://govspend.com/blog/doge-terminations-in-fy25-what-the-numbers-say-and-whats-still-to-come/