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.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
NG Baileyngbailey.com
A leading UK engineering and services business with a focus on excellence, integration, apprenticeship schemes, and investing in training and development |
4,914 | |||
| 2 |
Tetra Tech Europetetratech.com
A leading consulting and engineering services provider, specializing in sustainable solutions for diverse projects in the UK and Europe |
1,634 | |||
| 3 |
WYG Grouptetratecheurope.com
An award-winning professional services firm offering management consultancy, project management, technical services, and international development solutions to create value and manage risk |
1,056 | |||
| 4 | 912 | ||||
| 5 |
HGF Limitedhgf.com
Leading European firm providing fully integrated IP solutions with over 200 specialists in patents, trademarks, designs, and legal services across various industries |
871 | |||
| 6 |
Eville & Joneseandj.co.uk
Provision of outsourced official veterinary controls including audit, verification, and enforcement in animal health, public health, and welfare. |
720 | |||
| 7 |
Hippohippodigital.co.uk
Designs and builds bespoke digital services using data, human-centered design, and engineering, focusing on inclusive and impactful solutions for organizations and society. |
631 | |||
| 8 |
Walker Morris LLPwalkermorris.co.uk
Providing tailored, strategic legal advice and services through a diverse team of talented lawyers and professionals to global clients. |
589 | |||
| 9 |
Alexander Mann Solutionsweareams.com
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 |
587 | |||
| 10 |
Mach Recruitment Ltdmach.co.uk
The company provides innovative and proactive on-site, temporary, and permanent recruitment services with a focus on meeting all staffing needs efficiently |
567 | |||
| 11 |
Sweco UKsweco.co.uk
A leading architecture and engineering consultancy, Sweco plans and designs sustainable communities and cities for the future worldwide |
489 | |||
| 12 |
Capita Customer Managementcapitacustomermanagement.co.uk
Specializing in customer management, we work with top brands to handle the entire customer journey and product lifecycle, guaranteeing transformative results |
453 | |||
| 13 |
Progenytheprogenygroup.com
An integrated UK firm offering financial planning, asset management, tax, HR, legal services, and more to make a positive impact for clients and society |
428 | |||
| 14 |
Stowe Family Law LLPstowefamilylaw.co.uk
Specialist family law firm with a national and international reputation, offering a wide range of services including divorce, mediation, and prenuptial agreements |
391 | |||
| 15 |
BTG Eddisonseddisons.com
Providing expert advice and professional services in the real estate sector, specializing in delivering innovative solutions for clients nationwide and overseas |
381 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 16 |
First Actuarialfirstactuarial.co.uk
First Actuarial provides personalized pension advisory services, prioritizing client needs and professional integrity, with a focus on employee financial security and development |
378 | |||
| 17 |
Redmayne Bentley LLPredmayne.co.uk
Independent firm offering bespoke investment management, stockbroking, ISAs, SIPPs, focusing on personalized client service and wealth enhancement. |
369 | |||
| 18 |
IDHLidhlagency.com
A full-service digital marketing agency specializing in SEO, paid media, web development, eCommerce strategy, email marketing, and data management |
363 | |||
| 19 |
CSGcsgtalent.com
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 |
354 | |||
| 20 |
Clarion Solicitorsclarionsolicitors.com
A team of experienced lawyers and support staff focused on building strong partnerships, protecting clients, and fostering growth and success |
328 | |||
| 21 |
Ison Harrison Solicitorsisonharrison.co.uk
A team of solicitors and lawyers providing a comprehensive range of legal services for individuals and businesses with a strong reputation for quality |
328 | |||
| 22 |
Simpson Millar Solicitorssimpsonmillar.co.uk
A consumer law firm with a history dating back to 1841, offering transparent and straightforward legal services while prioritizing client communication and accessibility |
310 | |||
| 23 |
Xalientxalient.com
Xalient offers transformative network, security, and communication solutions with AIOps technologies to build resilient, adaptable networks and enhance customer experiences |
267 | |||
| 24 |
Aire Logic Limitedairelogic.com
Specializes in healthcare ICT strategy, software and product development, focusing on national system integration and full software lifecycle expertise. |
258 | |||
| 25 |
Sanderson Weatherall | certified B Corpsw.co.uk
Commercial property consultancy firm with expertise in advising owners, occupiers, investors, and developers on property and associated assets for success |
255 | |||
| 26 | 240 | ||||
| 27 |
Caval Ltdcaval.co.uk
A leading construction recruitment specialist providing excellent service across sectors, connecting clients with candidates for temporary and permanent positions |
196 | |||
| 28 |
The Private Office (TPO)theprivateoffice.com
Financial planning company offering tailored solutions for individuals, families, businesses, and trusts, including wealth management, investment portfolio management, and estate planning |
192 | |||
| 29 |
Bartlett Groupbartlettgroup.com
An independent insurance and financial solutions provider since 1940, offering tailored services globally with a commitment to excellence and community support |
186 | |||
| 30 |
ICS-digitalics-digital.com
Global digital agency specializing in SEO, content, advertising, translation, and digital PR across highly regulated and competitive industries worldwide. |
185 | |||
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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.
More company lists in Leeds
- The largest companies in Leeds 478
- Multinational companies in Leeds 67
- Retail chains in Leeds 46
- Financial services firms in Leeds 45
- Financial Services companies in Leeds 38
- SaaS companies in Leeds 35
- IT Services and IT Consulting companies in Leeds 34
- Manufacturers in Leeds 32
- IT services companies in Leeds 31
- Software Development companies in Leeds 27
The same list elsewhere in United Kingdom
- Professional services firms in the United Kingdom 2,706
- Professional services firms in Scotland 112
- Professional services firms in London 1,248
- Professional services firms in Manchester 86
- Professional services firms in Edinburgh 43
- Professional services firms in Birmingham 37
- Professional services firms in Glasgow 29
- Professional services firms in Bristol 25