Dominik Heer.
Attorney-at-Law · Founder of LEGAL 90+
Boutique law firm for sports law, employment law and commercial law — with focus on the contracts, proceedings and transactions of professional football.
- Admission
- since 2008· 18 years in practice
- Bar
- Bar of Mecklenburg-Western Pomerania (Germany)
- Location
- Rostock · Mandates Germany-wide & international
- Languages
- German · English · further on request
A boutique firm is not a smaller big-law firm.
It is a different way to practise.
Legal counsel in professional sport operates at the intersection of performance, market value, regulation and public perception. It demands counsel that holds all four axes at once — and that, beyond textbook subsumption, understands what a clause in a professional's contract triggers economically and commercially.
LEGAL 90+ is deliberately set up as a narrow boutique. What is handled here is handled in depth. Where additional specialisation is required — international tax law, complex corporate transactions, foreign federation jurisdiction — work proceeds with selected partner firms. Leadership and responsibility remain here at all times.
Mandates are conducted personally. Discretion is not an option but a working principle. Decisions are taken strategically — sporting, economic and legal aspects thought through together, with a view to the client's career and the structural advantages that emerge from precise preparation.
What is concretely addressed.
Four areas in which the firm stands deeply — interlocked along the client's career or along the economic logic of the club.
Employment Law in Professional Football
- Player and coaching contracts
- Compensation, bonus and exit arrangements
- Termination agreements and severance models
- Variable compensation systems, premium models
- Exit clauses and release conditions
Commercial and Marketing Law
- Sponsorship and endorsement agreements
- Trademark and personality rights
- IP exploitation and licensing chains
- International marketing structures
- Image rights and data exploitation
Transfer and Career Transitions
- National and international transfers
- Loan models and registration procedures
- Release clauses, medical provisions
- Signing bonuses and severance claims
- ITC procedures and FIFA Clearing House
Dispute Resolution and Sports Tribunals
- Proceedings before national sports tribunals
- FIFA DRC, FIFA PSC, UEFA arbitration
- CAS proceedings in Lausanne
- Interim relief in the transfer window
- Enforcement of international arbitral awards
Two books on the mechanics of the market.
Both published in 2026 by BoD. Written from advisory practice — not from academic distance. German editions; English translations on request.
The Hidden Economy of Professional Football
How contracts, cash flows and structures truly shape the market.
Behind every transfer, every player contract and every investment decision lies a second market: invisible, precise, codified by law. A network of cash flows, risk allocations and contract architectures that determines who wins in this market over the long term.
The Calculable Player
How data, AI and capital are reshaping professional football.
Professional football has been measured in real time for two decades — players are continuously tracked, their market values algorithmically updated, their careers translated into probability functions. In parallel, private-equity funds, family offices and novel securitisation vehicles are restructuring the player market.
Both titles also available as e-book. Press reviews, sample chapters and review copies on request.
An initial consultation is confidential, direct and without obligation.
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