The Open Index · Engineering and architecture
Engineering and architecture: the numbers, the rules, the AI picture.
10 sourced benchmarks, 8 rules that shape marketing, and what public data says about AI search for engineering firms. 21 sources, each linked at the bottom.
- 19graded sources
- 12industries
- 10case files
- Quarterlyrefresh
Written byKris GjorgjioskiKeyword research and industry benchmarks, Webtec Research
Checked byHristijan NajcheskiHead of SEO and AEO (technical and AI SEO), data verification
Updated October 15, 2026
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BENCHMARKS
What the research says about engineering firms, number by number.
Each card names its context and its source. Brackets match the source list at the bottom.
71%
of buyers ask a friend or colleague first when looking for a new professional services firm
Hinge Research Institute, How Buyers Buy (822 buyers and 533 providers across professional services; 38% of the sample was architecture, engineering and construction). Vendor research: Hinge is a marketing consultancy. Online search was 11%.
[1] hingemarketing.com51.9%
of firms surveyed had ruled out a referred provider before speaking to it
Hinge Research Institute, Referral Marketing for Professional Services Firms (2015; 523 firms across accounting, technology, management consulting, AEC, legal and marketing). Vendor research, cross-industry, not engineering-only.
[2] hingemarketing.com21%
cite a good reputation as the most important initial selection criterion
Same Hinge study. Reputation (21%) ranked ahead of an existing relationship (18%) and team expertise or skills (12%). Cost was a minor consideration in final selection. Vendor research.
[1] hingemarketing.com500
complaints a year the California Architects Board says it may investigate under the Practice Act
California Architects Board informational bulletin (undated). The Board says it investigates as many as 500 complaints per year, and misuse of the term architect is the most common violation.
[3] cab.ca.gov50%
median win rate for architecture and engineering firms
Deltek Clarity A&E Industry Study, 46th edition, published May 2025 (nearly 700 firms in the United States and Canada). Proposals fell 38% year over year while the value of awarded work rose 52%. Software vendor research.
[4] deltek.com13 + 9
internal stakeholders and external influencers in a typical business purchase
Forrester, The State of Business Buying, 2026 (press release, January 21, 2026). The number rises for complex or strategic purchases. The release does not state the sample size. Analyst research on B2B buying in general.
[5] forrester.com8% vs 15%
of visits led to a click on a search result with versus without an AI summary
Pew Research Center, 900 U.S. adults whose browsing was tracked in March 2025. Users ended the session in 26% of visits with an AI summary versus 16% without. General consumer search, not B2B.
[6] pewresearch.org43.6%
cited not understanding how the provider could help as a reason for ruling out a referral
Same Hinge referral survey (523 firms, 2015). It was the most common of 14 reasons offered. Vendor research.
[2] hingemarketing.com53%
of A&E firms use AI tools, up from 38% the year before
Deltek Clarity A&E Industry Study, 46th edition, May 2025 (nearly 700 firms). Use cases included proposal development and business development. Software vendor research.
[4] deltek.com$53,088
maximum civil penalty per violating email under CAN-SPAM
FTC CAN-SPAM compliance guide for business, January 2024 update. The law makes no exception for business-to-business email.
[7] ftc.gov
THE RULES
What engineering firms are allowed to say, and where it is written.
The rules and guidance that most often shape marketing in this industry, in plain English.
California Professional Engineers Act, sections 6732 and 6738 (BPELSG)
Only a California-licensed professional engineer may use titles such as professional engineer, consulting engineer or the listed branch titles (civil, electrical, mechanical, fire protection and others). A business offering civil, electrical or mechanical engineering must have a licensed engineer as owner, partner or officer in charge and have the work done under a licensed engineer in responsible charge. If a business name contains a person, that person must be a licensed engineer, land surveyor, architect or registered geologist, and ads naming individuals must clearly designate each person's license discipline.
What it means: Check every staff title on your site, proposals and LinkedIn: "civil engineer" on an unlicensed person is a violation, not a style choice. Do not put an unlicensed founder in the firm name. When your site names people, label the discipline of each license. Out-of-state firms with a California branch need a California-licensed person in charge on site.
[8] bpelsg.ca.govCalifornia Architects Practice Act, Business and Professions Code section 5536 and CCR section 134
The California Architects Board states that only a California-licensed architect may refer to themselves with the terms architect, architecture or architectural. Section 5536 makes it a misdemeanor, with a fine of $100 to $5,000, up to one year in county jail, or both, to use a term confusingly similar to architect, or to advertise in a way that indicates a person is an architect or an architectural designer. CCR section 134 bars architect or architecture in a business name or service description unless a licensee is in management control of all of the firm's professional services.
What it means: A design-build firm, a drafting service or an engineer offering building design cannot call itself an architecture practice or use "architectural designer" in ads unless the rule is met. Review the firm name, tagline, service list, directory listings and social bios. The Board says it investigates as many as 500 complaints a year under the Act, and misuse of the term architect is the most common violation.
[3] cab.ca.govNew York Education Law section 7202 (engineering), architecture title guidance (NYSED) and Texas 22 TAC 137.71
The New York State Education Department says only a licensed or otherwise authorized person may practice engineering or use the title professional engineer, and business entities need a Certificate of Authorization. For architecture, it says only a New York licensee may call themselves an architect, that misuse of the title may be prosecuted as a Class A misdemeanor, and that offering architectural services without a license may be charged as a Class E felony. It also warns that "architectural designer" and "interior architecture" may be barred for unlicensed people, and that "Principal" should not go to an unlicensed person without explaining they are not licensed.
What it means: Audit job titles, "About" pages and bios. A marketing director or designer called "Principal" or "Director of Architectural Design" can create a problem. Texas adds a firm-name rule: 22 TAC 137.71 bars an unregistered entity from using engineer, engineering, engineered or licensed engineer in advertisements, directory listings or a business name.
[9] op.nysed.govNCEES Model Rules of Professional Conduct and AIA Code of Ethics rules 3.301 and 4.201
The NCEES Model Rules (August 2025 edition), which states adopt in varying forms, say engineers must include relevant information in an objective and truthful manner in all professional statements, must not falsify or permit misrepresentation of qualifications or exaggerate their responsibility or the complexity of prior assignments, and that solicitation presentations must not misrepresent facts about employers, associates, joint ventures or past accomplishments. The AIA Code (April 2024 edition), binding on AIA members, bars misleading, deceptive or false statements about qualifications, experience or performance, requires accurate statements of responsibility for work claimed, and bars misleading prospective clients about results the member can achieve.
What it means: Credit projects honestly. If you were the structural consultant to another firm's architect, say so, and do not show the finished building as your work alone. Avoid "guaranteed" outcomes and unproven savings. NCEES also bars gifts or commissions to secure work, which matters for referral fees and public-sector hospitality.
[10] ncees.orgClient confidentiality, project images and credentials (AIA rule 3.401, 17 U.S.C. section 120, USGBC marks)
The AIA Code bars knowingly disclosing information a client asked to keep in confidence, except where the Code or law allows. Under 17 U.S.C. section 120, copyright in a built architectural work does not prevent pictures of a building that is located in or ordinarily visible from a public place. The copyright definition in section 101 treats a design as including a building, architectural plans or drawings. USGBC states that its LEED marks may not be used on products, brochures, labels and packaging, that marks are issued with a year and level, and that it does not endorse third-party products or services.
What it means: Get written permission before naming a client or showing interiors, drawings or renderings, especially for secure, healthcare, industrial or public-safety facilities. Do not assume a public exterior photo clears the client relationship. Describe LEED accurately: a project is certified, not the firm, and use the marks only as USGBC instructs.
[11] aia.orgBrooks Act and FAR subpart 36.6: qualifications-based selection for public clients
For federal architect-engineer work, the government publicly announces requirements and negotiates on the basis of demonstrated competence and qualifications at fair and reasonable prices. FAR 36.602-1 lists the evaluation factors: professional qualifications, specialized experience and technical competence, capacity, past performance, and location where it leaves enough qualified firms. Price is not a selection criterion. Firms file Standard Form 330 to be considered, and the contracting officer negotiates with the top-ranked firm first. Many states have similar laws.
What it means: Public-sector marketing is about being the obvious qualified firm, not the cheapest. Keep a current, reusable record of similar projects, named key staff and resumes. Do not quote fees in qualifications material, and never offer gifts or favors to evaluators. Know your state's procurement law, because it can differ from the federal rule.
[12] acquisition.govFTC Endorsement Guides: testimonials and reviews
The FTC says connections between an endorser and a business, such as payment, free services, commissions or employment, must be clearly disclosed when they would affect how people weigh the endorsement. Businesses should not selectively solicit reviews from satisfied customers, condition incentives on positive reviews, or suppress negative ones, and cannot present an exceptional result as typical.
What it means: Client quotes on your site must be real, current and not edited to change the meaning. Disclose it if a client got a discount or other benefit for a review. Do not hide critical reviews on directories you control. Check the claim against your professional code as well.
[13] ftc.govCAN-SPAM Act and UK PECR: B2B email
In the United States, CAN-SPAM makes no exception for business-to-business email. Messages need accurate header information, a non-deceptive subject line, an ad disclosure, a valid physical postal address and a working opt-out honored within 10 business days. Each violating email can carry civil penalties of up to $53,088, according to the FTC page updated January 2024. In the UK, the ICO says you can email any corporate body, but sole traders and some partnerships are treated as individuals and need consent or a qualifying prior sale.
What it means: Your outreach to developers, owners and public agencies must carry a postal address and an opt-out. Keep a suppression list and honor it. If you email UK sole traders, get consent first. Canada has its own anti-spam law, CASL, which this page does not cover: check it before emailing Canadian contacts.
[7] ftc.gov
General information, not legal advice. Licensing, title and advertising rules are set by each state or provincial board and change. Confirm the current rules with your own board, your professional association and counsel before you publish.
AI SEARCH LENS
What public data says about AI search here
- Industrials: most-cited domainsDeloitte, Indeed, McKinsey, Wolters Kluwer, SiemensConductor · 2025
Industry categories in public studies are approximate matches. Full explanations: click impact, who AI cites.

Cite this page.
How we help engineering firmsCITE THIS PAGE
Webtec Research. (2026, October 15). Engineering and architecture: benchmarks, rules and AI search data. The Open Index by Webtec. https://www.trywebtec.com/resources/index/industries/engineering-architecture/
SOURCES
Sources and notes
21 sources collected by our research team for this industry. Brackets in the text match these numbers. AI-search figures link to the source library, where each is graded.
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A LIVING REFERENCE
Refreshed every quarter.
We re-check every source in January, April, July and October, add new studies and retire old ones. This is Edition 1 (October 15, 2026); the next is due January 2027. Changes are logged on the methodology page.






































































