Matt Trakker worked for Gizmonic Institute before forming the original M.A.S.K. team.
How would he, Andy, and Miles Mayhem have the knowledge and technology to form the team otherwise? Nash Gorey and Sabrina Raincomprix are relatives.
Nash and Sabrina both wear glasses and are sycophants to antagonists. It is very likely that the two haven't had much contact. It is most likely that they are estranged or that Sabrina's father (a police officer) has warned Nash to stay away from her.