Vasyl Serhiiovych Hrytsak is a Ukrainian serviceman, army general, and the fourteenth head of the Security Service of Ukraine. Founder and chairman of the supervisory board of the Ukrainian Center for Analytics and Security. Head of the Security Service of Ukraine (2015–2019). Member of the National Security and Defense Council (2015–2019). General of the Army of Ukraine.

The Security Service of Ukraine is the main internal security agency of the Ukrainian government. Its main duties include counter-intelligence activity and combating organized crime and terrorism. The Constitution of Ukraine defines the SBU as a military formation, and its staff are considered military personnel with ranks. It is subordinated directly under the authority of the president of Ukraine. The SBU also operates its own special forces unit, the Alpha Group.