What is a TWIC card, and when is it required?

A Transportation Worker Identification Credential (TWIC) is a federal security credential required for unescorted access to secured maritime facilities — think marine terminals, ports, and certain offshore-support facilities — issued by the Transportation Security Administration after a background check. Most inland drilling, completions, and production roles do not require one, since they don't involve access to secured port or marine facilities. It becomes relevant specifically for offshore-adjacent logistics, marine terminal work, or any role that requires entering a TWIC-controlled facility. If a posting mentions a port, marine terminal, or offshore-support base, ask whether TWIC is required before applying — the requirement follows the facility, not the job title, and the card takes weeks to obtain.