Is acting lead General Counsel to DHS. (office link here)

Important articles:

The Handbasket got leaked memo authored by Mazzara removing legal barriers to protect federal property (off property and by any means necessary for ICE and DHS by FPS)

Propublica outlines the closing of DHS Civil Rights oversight office. Effects are no accountability for civil rights and liberties violations and facilitating mass deportations. Mazzara considering RICO charges against the office.

Also contributed some kind of document or opinion (I think you need to be a lawyer involved in the case to see this) to the Kilmar Abrego Garcia case. Photo is attached to search result of note.