DHS Special Emergency Response Teams

The Homeland Security SERT is composed of both ICE's HSI SRT and Border Patrol's BORTAC. 

As a combination of specialty federal assets, SERT contains many desirable emergency response units that may be deployed anywhere within the nation to supplement other agencies or perform assignments in the interest of national safety and security including sniper coverage for high-risk operations, dignitary protection, high-risk national events, requests for assistance from other agencies, etc.. 

Depending on uniform / accessory choice and the type of incident being responded to, the tactical officer operating as SERT may choose to identify themselves as DHS SERT, CBP BORTAC, or HSI SRT; they are synonymous and all refer to the same entity. 

Customs and Border Patrol: Border Patrol Tactical Unit (BORTAC) 

BORTAC is the tactical response unit of the Border Patrol responsible for handling terrorist incidents, conducting raids, and performing general high-risk tactical assignments along with a variety of assisting functions to other agencies. 

ICE: Homeland Security Investigations SRT (HSI SRT)

SRT handles HSI's high-risk arrests / search warrants and barricaded suspect incidents. (No designated uniform)

Open the sheet below for textures:

[SADRP] Homeland Security Join SRT Structure | Staff + LEO Heads