Neyah specializes in criminal defense and investigations, with a particular focus on financial economic crime, anti-money laundering legislation, international sanctions regulations and fraud.

Neyah helps companies and boards prevent violations of laws and regulations, for instance by implementing compliance measures. Neyah also assists companies and boards in the event of a potential breach of laws and regulations, including by conducting investigations, taking remedial action and preparing for potential government enforcement. Neyah has broad experience in defending companies that are the subject of complex national and international investigations, both by criminal investigative and prosecutorial agencies (e.g. the FIOD and the Dutch Public Prosecution Office) and by administrative enforcement agencies (e.g. the AFM and DNB). Neyah often cooperates closely with other internal and external experts, such as internal auditors and forensic accountants.

Neyah has acted as counsel in some of the most high-profile enforcement cases in the Netherlands and is recommended in guides such as Chambers and Legal 500, wherein he is described by clients as "impressive" (Chambers 2020), "multi-talented" (Legal 500 2021) and "always on the ball and fully focused on the best results" (Chambers 2021). In 2019 Neyah was awarded the European Rising Star Award in the category 'White collar crime'. Neyah regularly publishes and gives lectures on compliance, investigations and international sanctions.