# 30 leading professional services firms in Houston

Tamtam tracks 156 professional services firms headquartered in Houston. This list ranks the 30 largest by number of employees on LinkedIn, led by Halliburton, KBR, Inc. and Asset Living. Their median headcount is 1,680. Half of them were founded in 1978 or later.

These professional services firms in Houston are mostly large and mid-sized companies. Key industries include oil and gas, with Halliburton engineering solutions for energy asset value and Superior Energy Services offering oilfield products. IT services are also prominent, with KBR, Inc. providing science, technology, and engineering solutions, and KBR Careers delivering value-added services globally. Real estate is represented by Asset Living, a third-party management firm, and Transwestern, which delivers personalized services.

The data shows a strong concentration in the energy sector, reflecting Houston's role as a global energy hub. Companies like S&B, an engineer and constructor for industrial facilities, and CDI Engineering Solutions, specializing in project planning for energy and chemicals, highlight this focus. Another common theme is the provision of specialized expertise, such as Weaver's accounting services and Vinson & Elkins' legal counsel.

🇺🇸 Houston · 30 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Halliburton](https://www.tamtam.ai/c/halliburton) (halliburton.com)<br>Collaborates to engineer solutions maximizing energy asset value, from locating hydrocarbons, managing data, drilling, evaluating, and constructing wells, to optimizing production. | Oil and Gas | 🇺🇸 Houston | 60,277 | 1919 |
| 2 | [KBR, Inc.](https://www.tamtam.ai/c/kbr-inc) (kbr.com)<br>Providing science, technology, and engineering solutions to governments and companies worldwide addressing significant contemporary challenges and opportunities. | IT Services and IT Consulting | 🇺🇸 Houston | 31,433 |  |
| 3 | [Asset Living](https://www.tamtam.ai/c/asset-living) (assetliving.com)<br>A third-party management firm specializing in diverse real estate properties across the US, driving innovation and results for clients and communities | Real Estate | 🇺🇸 Houston | 5,216 | 1986 |
| 4 | [S&B](https://www.tamtam.ai/c/s-and-b) (sbec.com)<br>A leading engineer and constructor for large industrial facilities, providing certainty, expertise, and commitment to deliver purpose-built solutions for clients worldwide | Oil and Gas | 🇺🇸 Houston | 4,293 | 1967 |
| 5 | [Superior Energy Services](https://www.tamtam.ai/c/superior-energy-services) (superiorenergy.com)<br>A global oilfield products and services company offering rental, well servicing, engineered solutions, and expert consultative services for oil & gas exploration and production companies worldwide | Oil and Gas | 🇺🇸 Houston | 2,946 |  |
| 6 | [Transwestern](https://www.tamtam.ai/c/transwestern) (transwestern.com)<br>Privately held real estate company delivering personalized services, innovative solutions, and driving value for clients globally through strategic alliances | Real Estate | 🇺🇸 Houston | 2,833 | 1978 |
| 7 | [KBR Careers](https://www.tamtam.ai/c/kbr-careers) (careers.kbr.com)<br>Global provider of science, technology, and engineering solutions to governments and companies, delivering value-added services and operations in 33 countries | IT Services and IT Consulting | 🇺🇸 Houston | 2,732 | 1919 |
| 8 | [Key Energy Services](https://www.tamtam.ai/c/key-energy-services) (keyenergy.com)<br>Key Energy Services, headquartered in Houston, provides energy production solutions and services to E&P companies, optimizing well production for long-term success | Oil and Gas | 🇺🇸 Houston | 2,669 | 1977 |
| 9 | [CDI Engineering Solutions](https://www.tamtam.ai/c/cdi-engineering-solutions-houston) (tataconsultingengineers.com)<br>Engineering services provider for energy, chemicals, and infrastructure sectors Specializing in project planning, design, commissioning, and construction management for successful outcomes | Services for Renewable Energy | 🇺🇸 Houston | 2,633 | 1950 |
| 10 | [Airswift](https://www.tamtam.ai/c/airswift) (airswift.com)<br>Supporting STEM professionals in technology and engineering with job placement services, boasting unrivaled talent pool and global presence in 60 offices | Staffing and Recruiting | 🇺🇸 Houston | 2,223 |  |
| 11 | [Weaver](https://www.tamtam.ai/c/weaver) (weaver.com)<br>A Houston-based firm providing top accounting services, including assurance, tax, risk advisory, IT advisory, energy compliance, consulting, and specialty tax services | Accounting | 🇺🇸 Houston | 2,105 | 1950 |
| 12 | [Vinson & Elkins](https://www.tamtam.ai/c/vinson-and-elkins) (connect.velaw.com)<br>providing expert legal counsel and innovative solutions to leading companies across various industries, focusing on complex matters and client trust | Law Practice | 🇺🇸 Houston | 1,786 | 1917 |
| 13 | [PSC](https://www.tamtam.ai/c/psc) (jd3consultingllc.com)<br>Consulting business offering expertise in engineering, sales, and business development, particularly in mergers and acquisitions (M&A) | Oil and Gas | 🇺🇸 Houston | 1,713 | 2021 |
| 14 | [CAMS](https://www.tamtam.ai/c/cams) (camstex.com)<br>Provides disciplined asset management and operations services, maximizing clients' value through operational performance, commercial optimization, and financial controls A reputation for creativity and flexibility | Utilities | 🇺🇸 Houston | 1,712 | 2007 |
| 15 | [Audubon Companies](https://www.tamtam.ai/c/audubon-companies) (auduboncompanies.com)<br>A leading provider of EPC, consulting, fabrication, and technical services for energy, chemicals, power, infrastructure, and industrial markets with a focus on sustainability | Engineering Services | 🇺🇸 Houston | 1,680 | 1997 |
| 16 | [Baker Botts](https://www.tamtam.ai/c/baker-botts) (bakerbotts.com)<br>Global law firm specializing in energy, technology, and life sciences sectors, providing creative legal solutions and demonstrating commitment to excellence since 1840 | Law Practice | 🇺🇸 Houston | 1,633 | 1840 |
| 17 | [Radix - Global](https://www.tamtam.ai/c/radix-global) (radixeng.com)<br>A global technology solutions company offering innovative industrial solutions to drive transformation, operational excellence, and sustainable value worldwide | IT Services and IT Consulting | 🇺🇸 Houston | 1,619 |  |
| 18 | [Searce Inc](https://www.tamtam.ai/c/searce-inc) (searce.com)<br>A company focused on refining, analyzing, and improving to deliver intelligent, impactful, and futuristic business outcomes through passionate employees | Business Consulting and Services | 🇺🇸 Houston | 1,587 | 2004 |
| 19 | [AIS Info](https://www.tamtam.ai/c/ais-info) (aisinfo.com)<br>The company automates processes, improves compliance, and provides cost-effective labor solutions across industries, enabling clients to focus on growth and make data-driven decisions | Financial Services | 🇺🇸 Houston | 1,509 | 2000 |
| 20 | [PBK](https://www.tamtam.ai/c/pbk) (pbk.com)<br>A leading architecture, engineering, and consulting practice specializing in design solutions for education, healthcare, corporate, government, and sports/events sectors since 1981 | Architecture and Planning | 🇺🇸 Houston | 1,366 |  |
| 21 | [Frank's International N.V.](https://www.tamtam.ai/c/frank-s-international-n-v) (expro.com)<br>Enables customers to make better-informed decisions through data and digital transformation, addressing energy challenges with innovative technology across well construction and production. | Oil and Gas | 🇺🇸 Houston | 1,340 |  |
| 22 | [Walter P Moore](https://www.tamtam.ai/c/walter-p-moore) (walterpmoore.com)<br>A team of engineers and innovators designing high-performance structures and infrastructure globally, providing cost-efficient solutions that shape communities worldwide | Engineering Services | 🇺🇸 Houston | 1,340 | 1931 |
| 23 | [alliantgroup](https://www.tamtam.ai/c/alliantgroup) (alliantglobal.com)<br>A premier consulting and management engineering firm, using science-based methods and a team of 2,000 professionals to deliver solutions for businesses worldwide | Business Consulting and Services | 🇺🇸 Houston | 1,325 | 2002 |
| 24 | [Servicios Contables](https://www.tamtam.ai/c/servicios-contables) (sccalop.com)<br>Servicios Contables provides executive office services, specializing in accounting, located in Houston, Texas | Accounting | 🇺🇸 Houston | 1,314 |  |
| 25 | [BGE, Inc.](https://www.tamtam.ai/c/bge-inc) (bgeinc.com)<br>A consulting firm offering engineering, environmental, surveying, construction management, and planning services for public and private clients nationwide Visit bgeinccom for more information | Civil Engineering | 🇺🇸 Houston | 1,313 | 1975 |
| 26 | [Rimkus](https://www.tamtam.ai/c/rimkus) (rimkus.com)<br>Global leader in engineering & technical consulting, offering services to various industries worldwide with a focus on resolving accidents, claims, legal disputes, and complex risks | Business Consulting and Services | 🇺🇸 Houston | 1,265 | 1983 |
| 27 | [Self](https://www.tamtam.ai/c/self-houston) (culbertsonresources.com)<br>Specializing in recruiting for IT, finance, energy, clerical/admin, and industrial sectors Placements range from executives to staff, offering various employment arrangements | Staffing and Recruiting | 🇺🇸 Houston | 1,242 | 2002 |
| 28 | [Gulf Companies](https://www.tamtam.ai/c/gulf-companies) (gulfcompanies.com)<br>A leading provider of engineering and technical services in the global energy industry, focusing on safe, sustainable solutions and client success | Oil and Gas | 🇺🇸 Houston | 1,218 | 1953 |
| 29 | [Camin Cargo Control Inc.](https://www.tamtam.ai/c/camin-cargo-control-inc) (camincargo.com)<br>This company provides inspection, laboratory testing, and additive treatment solutions to the Petroleum Industry with a focus on quality and customer satisfaction | Oil and Gas | 🇺🇸 Houston | 1,215 | 1982 |
| 30 | [Primary Services](https://www.tamtam.ai/c/primary-services) (primaryservices.com)<br>Connects accounting, IT, HR, marketing, and administrative professionals with contract, temp-to-perm, and direct-hire positions at Fortune 500 clients in Texas and Oklahoma. | Staffing and Recruiting | 🇺🇸 Houston | 1,215 | 1988 |

## How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 11, 2026.

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Source: https://www.tamtam.ai/l/professional-services-firms-houston