# Professional services firms headquartered in Düsseldorf

Tamtam tracks 28 professional services firms headquartered in Düsseldorf. This list ranks all of them by number of employees on LinkedIn, led by Grant Thornton Germany, DIS AG and Baker Tilly Germany. Their median headcount is 301. Half of them were founded in 1983 or later.

This selection of professional services firms in Düsseldorf features mostly large and mid-sized companies, with a strong presence in business consulting, legal services, and human resources. Grant Thornton Germany is an audit firm, DIS AG provides personnel services, and Baker Tilly Germany offers global consulting. HEUKING is a business law firm, while Schüßler-Plan specializes in engineering services and TAKENAKA EUROPE in construction.

A notable pattern is the concentration of companies founded in the late 1960s and 1970s, indicating a period of significant growth for professional services in the region. Many of these firms, like Grant Thornton Germany and Schüßler-Plan, have a substantial number of employees, demonstrating their established presence and capacity.

🇩🇪 Düsseldorf · 28 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Grant Thornton Germany](https://www.tamtam.ai/c/grant-thornton-germany) (grantthornton.de)<br>A leading audit firm in Germany with 1,500 employees across 11 locations, helping clients achieve their goals through professional services | Professional Services | 🇩🇪 Düsseldorf | 1,493 | 1958 |
| 2 | [DIS AG](https://www.tamtam.ai/c/dis-ag) (dis-ag.com)<br>Industry-leading personnel service provider focusing on matching skilled professionals with new career opportunities, setting high standards in HR innovation and diversity | Human Resources Services | 🇩🇪 Düsseldorf | 1,395 | 1967 |
| 3 | [Baker Tilly Germany](https://www.tamtam.ai/c/baker-tilly-germany) (bakertilly.de)<br>A global consulting firm offering personalized services in Audit & Advisory, Tax, Legal, and Consulting with interdisciplinary teams and industry expertise | Business Consulting and Services | 🇩🇪 Düsseldorf | 916 | 1979 |
| 4 | [HEUKING](https://www.tamtam.ai/c/heuking) (heuking.de)<br>A leading German business law firm with over 400 legal professionals offering comprehensive legal advice to a range of clients | Law Practice | 🇩🇪 Düsseldorf | 744 | 1971 |
| 5 | [Schüßler-Plan](https://www.tamtam.ai/c/schussler-plan) (schuessler-plan.de)<br>With over 1000 experts at 22 locations, this leading German engineering company specializes in transportation infrastructure planning, building design, and project management services | Engineering Services | 🇩🇪 Düsseldorf | 633 | 1958 |
| 6 | [TAKENAKA EUROPE](https://www.tamtam.ai/c/takenaka-europe) (takenaka.eu)<br>A family-owned company with over 400 years of experience in architecture, engineering, and construction, specializing in future-oriented industrial and residential properties in Europe | Construction | 🇩🇪 Düsseldorf | 440 | 1973 |
| 7 | [Cassini Consulting AG](https://www.tamtam.ai/c/cassini-consulting-ag) (cassini.de)<br>Innovative management and technology consulting firm challenging conventions, leading clients forward with a focus on digitalization, disruption, knowledge advancement, and industry leadership | Business Consulting and Services | 🇩🇪 Düsseldorf | 440 | 2006 |
| 8 | [Taylor Wessing Germany](https://www.tamtam.ai/c/taylor-wessing-germany) (taylorwessing.com)<br>A leading international law firm with over 1,100 lawyers providing high-quality legal consultancy services in various practice areas across Europe and Asia | Law Practice | 🇩🇪 Düsseldorf | 421 | 1863 |
| 9 | [von Rundstedt](https://www.tamtam.ai/c/von-rundstedt) (rundstedt.de)<br>Specializes in workforce transformation through strategic planning, skill matching, employee redeployment, and managing staff restructuring and downsizing projects efficiently. | Human Resources Services | 🇩🇪 Düsseldorf | 377 | 1985 |
| 10 | [HPP Architekten GmbH](https://www.tamtam.ai/c/hpp-architekten-gmbh) (hpp.com)<br>A leading architectural partnership offering a full range of services, with a global team of 530 specialists and 13 offices worldwide Specializing in innovative and timeless design | Architecture and Planning | 🇩🇪 Düsseldorf | 365 | 1933 |
| 11 | [euro engineering AG](https://www.tamtam.ai/c/euro-engineering-ag) (ee-ag.com)<br>A leading engineering service provider in Germany with over 2,100 employees offering support in product development across various industries | Human Resources Services | 🇩🇪 Düsseldorf | 357 |  |
| 12 | [Vössing Ingenieurgesellschaft mbH](https://www.tamtam.ai/c/vossing-ingenieurgesellschaft-mbh) (voessing.de)<br>A leading consulting firm in Germany specializing in construction and transportation engineering services, offering a wide range of expertise and full-service solutions globally | Architecture and Planning | 🇩🇪 Düsseldorf | 338 | 1980 |
| 13 | [RSM Germany](https://www.tamtam.ai/c/rsm-germany) (wonderlink.de)<br>A top ten independent auditing and consulting firm in Germany, part of a global network of experienced experts through RSM International | Accounting | 🇩🇪 Düsseldorf | 309 | 1992 |
| 14 | [Mines and Metals Engineering GmbH](https://www.tamtam.ai/c/mines-and-metals-engineering-gmbh) (mme-co.de)<br>Specializing in turnkey engineering projects for mining and metal industries worldwide, offering consultancy, technical support, and own DRI technology for iron and steel production plants | Mining | 🇩🇪 Düsseldorf | 301 | 1996 |
| 15 | [Horn & Company](https://www.tamtam.ai/c/horn-and-company) (horn-company.com)<br>Top-level management consulting firm specializing in P&L-oriented performance improvement and digital transformation, managed by experienced partners from large consulting companies Awarded "Hidden Champions of the Consulting Market" | Business Consulting and Services | 🇩🇪 Düsseldorf | 249 | 2009 |
| 16 | [Adecco Business Solutions](https://www.tamtam.ai/c/adecco-business-solutions) (abs-group.de)<br>Full-service outsourcing partner in Germany, managing complex tasks in technical services, logistics, business process outsourcing, and sales marketing. | IT Services and IT Consulting | 🇩🇪 Düsseldorf | 185 | 1983 |
| 17 | [hhff® by headhunting for fashion](https://www.tamtam.ai/c/hhff-by-headhunting-for-fashion) (headhuntingforfashion.de)<br>Leading headhunting agency specializing in fashion and lifestyle sectors, connecting top talent with international players for career development and client success | Staffing and Recruiting | 🇩🇪 Düsseldorf | 120 | 2003 |
| 18 | [Havas Germany](https://www.tamtam.ai/c/havas-germany) (de.havas.com)<br>This company uses creativity to make a genuine difference in marketing and communication, focusing on integrated solutions and effective brand experiences | Advertising Services | 🇩🇪 Düsseldorf | 98 | 1835 |
| 19 | [FRTG Group](https://www.tamtam.ai/c/frtg-group) (frtg-group.de)<br>A group of six accounting and tax consulting firms offering a comprehensive range of services including auditing, tax advice, legal advice, and business consulting | Financial Services | 🇩🇪 Düsseldorf | 64 | 1962 |
| 20 | [AENGEVELT Immobilien](https://www.tamtam.ai/c/aengevelt-immobilien) (aengevelt.com)<br>Established in 1910, this independent, family-owned real estate company offers comprehensive services in Germany and globally, prioritizing partnership, professionalism, and market-oriented expertise | Real Estate | 🇩🇪 Düsseldorf | 59 | 1910 |
| 21 | [Future Marketing](https://www.tamtam.ai/c/future-marketing) (fmmc.com)<br>FM Consulting specializes in building future-proof, data-driven marketing strategies and providing transformation consulting services for DAX, MDAX, and mid-sized companies | Business Consulting and Services | 🇩🇪 Düsseldorf | 56 | 2007 |
| 22 | [KIB GROUP](https://www.tamtam.ai/c/kib-group) (kib-group.de)<br>Dynamic international management consulting firm offering strategy, operations, restructuring, and digital transformation services to companies of all sizes worldwide | Business Consulting and Services | 🇩🇪 Düsseldorf | 35 | 1989 |
| 23 | [Longial GmbH - Die Pensionsberater](https://www.tamtam.ai/c/longial-gmbh-die-pensionsberater) (longial.de)<br>Longial is a pensions advisor for medium-sized companies in Germany, offering comprehensive services from setting up pension plans to administrative support | Financial Services | 🇩🇪 Düsseldorf | 34 |  |
| 24 | [Go-on Group Business Development](https://www.tamtam.ai/c/go-on-group-business-development) (go-on-group.com)<br>Established in 1997, Go-on Group operates internationally, offering solutions to customer challenges and serving as a gateway to various markets | International Trade and Development | 🇩🇪 Düsseldorf | 32 | 1997 |
| 25 | [Penner + Partner mbB](https://www.tamtam.ai/c/penner-partner-mbb) (pennerundpartner.de)<br>A partner-managed audit firm specializing in serving national and international mid-sized companies with a focus on current expertise and excellent service | Financial Services | 🇩🇪 Düsseldorf | 22 | 1957 |
| 26 | [HENDRICKS, ROST & CIE. GmbH](https://www.tamtam.ai/c/hendricks-rost-and-cie-gmbh) (hrcie.com)<br>Experts in Business Intelligence and process consulting, specializing in improving decision-making and business control through innovative technology solutions and tailored strategies for efficiency and effectiveness | Business Consulting and Services | 🇩🇪 Düsseldorf | 13 | 2009 |
| 27 | [sales-genetics GmbH & Co. KG](https://www.tamtam.ai/c/sales-genetics-gmbh-and-co-kg) (sales-genetics.com)<br>Sales consultancy providing real-time AI sales coaching integrated into Salesforce, along with flexible sales methodology and competency assessments for individual skill development | Business Consulting and Services | 🇩🇪 Düsseldorf | 8 | 2006 |
| 28 | [Laneway](https://www.tamtam.ai/c/laneway) (laneway.de)<br>Laneway acts as a bridge between highly qualified candidates and selected client companies, specializing in direct permanent placements in various fields | Staffing and Recruiting | 🇩🇪 Düsseldorf | 5 | 2017 |

## 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 12, 2026.

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