# Professional services firms headquartered in Leeds

Tamtam tracks 55 professional services firms headquartered in Leeds. This list ranks the 30 largest by number of employees on LinkedIn, led by NG Bailey, Tetra Tech Europe and WYG Group. Their median headcount is 381. Half of them were founded in 1995 or later.

These Leeds-based professional services firms are mostly large, established companies, with several having been founded before the mid-20th century. The list includes companies such as NG Bailey, an engineering and services business, Tetra Tech Europe, which offers consulting and engineering services, and WYG Group, a professional services firm. BJSS is an IT and engineering consultancy, while HGF Limited provides integrated IP solutions.

A notable characteristic is the strong presence of legal services, with firms like HGF Limited, Walker Morris LLP, and Stowe Family Law LLP. The companies also show a mix of industries beyond legal, including construction, IT consulting, and financial services, indicating a diverse professional services sector in Leeds.

🇬🇧 Leeds · 30 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [NG Bailey](https://www.tamtam.ai/c/ng-bailey) (ngbailey.com)<br>A leading UK engineering and services business with a focus on excellence, integration, apprenticeship schemes, and investing in training and development | Construction | 🇬🇧 Leeds | 4,914 | 1921 |
| 2 | [Tetra Tech Europe](https://www.tamtam.ai/c/tetra-tech-europe) (tetratech.com)<br>A leading consulting and engineering services provider, specializing in sustainable solutions for diverse projects in the UK and Europe | Business Consulting and Services | 🇬🇧 Leeds | 1,634 | 1966 |
| 3 | [WYG Group](https://www.tamtam.ai/c/wyg-group) (tetratecheurope.com)<br>An award-winning professional services firm offering management consultancy, project management, technical services, and international development solutions to create value and manage risk | Business Consulting and Services | 🇬🇧 Leeds | 1,056 | 1959 |
| 4 | [BJSS](https://www.tamtam.ai/c/bjss) (bjss.com)<br>Award-winning technology and engineering consultancy providing IT solutions to global organizations, recognized with a Queen's Award for Enterprise Visit our website to learn more | IT Services and IT Consulting | 🇬🇧 Leeds | 912 | 1993 |
| 5 | [HGF Limited](https://www.tamtam.ai/c/hgf-limited) (hgf.com)<br>Leading European firm providing fully integrated IP solutions with over 200 specialists in patents, trademarks, designs, and legal services across various industries | Legal Services | 🇬🇧 Leeds | 871 | 1995 |
| 6 | [Eville & Jones](https://www.tamtam.ai/c/eville-and-jones) (eandj.co.uk)<br>Provision of outsourced official veterinary controls including audit, verification, and enforcement in animal health, public health, and welfare. | Veterinary Services | 🇬🇧 Leeds | 720 | 1993 |
| 7 | [Hippo](https://www.tamtam.ai/c/hippo) (hippodigital.co.uk)<br>Designs and builds bespoke digital services using data, human-centered design, and engineering, focusing on inclusive and impactful solutions for organizations and society. | IT Services and IT Consulting | 🇬🇧 Leeds | 631 | 2016 |
| 8 | [Walker Morris LLP](https://www.tamtam.ai/c/walker-morris-llp) (walkermorris.co.uk)<br>Providing tailored, strategic legal advice and services through a diverse team of talented lawyers and professionals to global clients. | Law Practice | 🇬🇧 Leeds | 589 |  |
| 9 | [Alexander Mann Solutions](https://www.tamtam.ai/c/alexander-mann-solutions) (weareams.com)<br>A global leader in talent acquisition and management services, providing innovative solutions to attract, engage, and retain top talent for organizations worldwide through consulting and outsourcing services | Staffing and Recruiting | 🇬🇧 Leeds | 587 |  |
| 10 | [Mach Recruitment Ltd](https://www.tamtam.ai/c/mach-recruitment-ltd) (mach.co.uk)<br>The company provides innovative and proactive on-site, temporary, and permanent recruitment services with a focus on meeting all staffing needs efficiently | Staffing and Recruiting | 🇬🇧 Leeds | 567 | 2007 |
| 11 | [Sweco UK](https://www.tamtam.ai/c/sweco-uk) (sweco.co.uk)<br>A leading architecture and engineering consultancy, Sweco plans and designs sustainable communities and cities for the future worldwide | Civil Engineering | 🇬🇧 Leeds | 489 | 1915 |
| 12 | [Capita Customer Management](https://www.tamtam.ai/c/capita-customer-management) (capitacustomermanagement.co.uk)<br>Specializing in customer management, we work with top brands to handle the entire customer journey and product lifecycle, guaranteeing transformative results | Outsourcing and Offshoring Consulting | 🇬🇧 Leeds | 453 | 1984 |
| 13 | [Progeny](https://www.tamtam.ai/c/progeny) (theprogenygroup.com)<br>An integrated UK firm offering financial planning, asset management, tax, HR, legal services, and more to make a positive impact for clients and society | Financial Services | 🇬🇧 Leeds | 428 | 2016 |
| 14 | [Stowe Family Law LLP](https://www.tamtam.ai/c/stowe-family-law-llp) (stowefamilylaw.co.uk)<br>Specialist family law firm with a national and international reputation, offering a wide range of services including divorce, mediation, and prenuptial agreements | Law Practice | 🇬🇧 Leeds | 391 | 1982 |
| 15 | [BTG Eddisons](https://www.tamtam.ai/c/btg-eddisons) (eddisons.com)<br>Providing expert advice and professional services in the real estate sector, specializing in delivering innovative solutions for clients nationwide and overseas | Real Estate | 🇬🇧 Leeds | 381 | 1844 |
| 16 | [First Actuarial](https://www.tamtam.ai/c/first-actuarial) (firstactuarial.co.uk)<br>First Actuarial provides personalized pension advisory services, prioritizing client needs and professional integrity, with a focus on employee financial security and development | Financial Services | 🇬🇧 Leeds | 378 | 2004 |
| 17 | [Redmayne Bentley LLP](https://www.tamtam.ai/c/redmayne-bentley-llp) (redmayne.co.uk)<br>Independent firm offering bespoke investment management, stockbroking, ISAs, SIPPs, focusing on personalized client service and wealth enhancement. | Financial Services | 🇬🇧 Leeds | 369 | 1875 |
| 18 | [IDHL](https://www.tamtam.ai/c/idhl) (idhlagency.com)<br>A full-service digital marketing agency specializing in SEO, paid media, web development, eCommerce strategy, email marketing, and data management | Marketing Services | 🇬🇧 Leeds | 363 | 2000 |
| 19 | [CSG](https://www.tamtam.ai/c/csg) (csgtalent.com)<br>Global talent experts specializing in permanent and executive search, with a focus on seven major practice areas, connecting clients and candidates for long-term success | Staffing and Recruiting | 🇬🇧 Leeds | 354 | 2003 |
| 20 | [Clarion Solicitors](https://www.tamtam.ai/c/clarion-solicitors) (clarionsolicitors.com)<br>A team of experienced lawyers and support staff focused on building strong partnerships, protecting clients, and fostering growth and success | Law Practice | 🇬🇧 Leeds | 328 |  |
| 21 | [Ison Harrison Solicitors](https://www.tamtam.ai/c/ison-harrison-solicitors) (isonharrison.co.uk)<br>A team of solicitors and lawyers providing a comprehensive range of legal services for individuals and businesses with a strong reputation for quality | Legal Services | 🇬🇧 Leeds | 328 | 1978 |
| 22 | [Simpson Millar Solicitors](https://www.tamtam.ai/c/simpson-millar-solicitors) (simpsonmillar.co.uk)<br>A consumer law firm with a history dating back to 1841, offering transparent and straightforward legal services while prioritizing client communication and accessibility | Law Practice | 🇬🇧 Leeds | 310 | 1841 |
| 23 | [Xalient](https://www.tamtam.ai/c/xalient) (xalient.com)<br>Xalient offers transformative network, security, and communication solutions with AIOps technologies to build resilient, adaptable networks and enhance customer experiences | IT Services and IT Consulting | 🇬🇧 Leeds | 267 | 2015 |
| 24 | [Aire Logic Limited](https://www.tamtam.ai/c/aire-logic-limited) (airelogic.com)<br>Specializes in healthcare ICT strategy, software and product development, focusing on national system integration and full software lifecycle expertise. | IT Services and IT Consulting | 🇬🇧 Leeds | 258 | 2007 |
| 25 | [Sanderson Weatherall \| certified B Corp](https://www.tamtam.ai/c/sanderson-weatherall-certified-b-corp) (sw.co.uk)<br>Commercial property consultancy firm with expertise in advising owners, occupiers, investors, and developers on property and associated assets for success | Real Estate | 🇬🇧 Leeds | 255 |  |
| 26 | [26PMX](https://www.tamtam.ai/c/26pmx) (26pmx.com)<br>A leading UK digital agency specializing in developing transformative digital platforms and marketing strategies driven by data, insight, and strategy | Advertising Services | 🇬🇧 Leeds | 240 | 2005 |
| 27 | [Caval Ltd](https://www.tamtam.ai/c/caval-ltd) (caval.co.uk)<br>A leading construction recruitment specialist providing excellent service across sectors, connecting clients with candidates for temporary and permanent positions | Staffing and Recruiting | 🇬🇧 Leeds | 196 | 2008 |
| 28 | [The Private Office (TPO)](https://www.tamtam.ai/c/the-private-office-tpo) (theprivateoffice.com)<br>Financial planning company offering tailored solutions for individuals, families, businesses, and trusts, including wealth management, investment portfolio management, and estate planning | Financial Services | 🇬🇧 Leeds | 192 | 2008 |
| 29 | [Bartlett Group](https://www.tamtam.ai/c/bartlett-group) (bartlettgroup.com)<br>An independent insurance and financial solutions provider since 1940, offering tailored services globally with a commitment to excellence and community support | Financial Services | 🇬🇧 Leeds | 186 | 1940 |
| 30 | [ICS-digital](https://www.tamtam.ai/c/ics-digital) (ics-digital.com)<br>Global digital agency specializing in SEO, content, advertising, translation, and digital PR across highly regulated and competitive industries worldwide. | Marketing Services | 🇬🇧 Leeds | 185 | 2008 |

## 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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- [Multinational companies in Leeds](https://www.tamtam.ai/l/multinational-companies-leeds) (67)
- [Retail chains in Leeds](https://www.tamtam.ai/l/retail-chains-leeds) (46)
- [Financial services firms in Leeds](https://www.tamtam.ai/l/financial-services-firms-leeds) (45)
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- [SaaS companies in Leeds](https://www.tamtam.ai/l/saas-companies-leeds) (35)
- [IT Services and IT Consulting companies in Leeds](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-leeds) (34)
- [Manufacturers in Leeds](https://www.tamtam.ai/l/manufacturers-leeds) (32)
- [IT services companies in Leeds](https://www.tamtam.ai/l/it-services-companies-leeds) (31)
- [Software Development companies in Leeds](https://www.tamtam.ai/l/software-development-companies-leeds) (27)

## The same list elsewhere in United Kingdom

- [Professional services firms in the United Kingdom](https://www.tamtam.ai/l/professional-services-firms-united-kingdom) (2,706)
- [Professional services firms in Scotland](https://www.tamtam.ai/l/professional-services-firms-scotland) (112)
- [Professional services firms in London](https://www.tamtam.ai/l/professional-services-firms-london) (1,248)
- [Professional services firms in Manchester](https://www.tamtam.ai/l/professional-services-firms-manchester) (86)
- [Professional services firms in Edinburgh](https://www.tamtam.ai/l/professional-services-firms-edinburgh) (43)
- [Professional services firms in Birmingham](https://www.tamtam.ai/l/professional-services-firms-birmingham) (37)
- [Professional services firms in Glasgow](https://www.tamtam.ai/l/professional-services-firms-glasgow) (29)
- [Professional services firms in Bristol](https://www.tamtam.ai/l/professional-services-firms-bristol) (25)

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