Maritime Industry Drug Testing

The US Water Transportation Industry serves the needs of both foreign and domestic commerce. Companies within this industry carry freight or passengers in the open seas or inland waterways, offer towing services, charter vessels, and operate canals and terminals.  Other occupations are within the US Naval Reserve, the Merchant Marine Reserve and the US Coast Guard.

A large focus of this industry is safety. This administration maintains a fleet of cargo ships in reserve to provide surge sealift during war and national emergencies.

Common maritime jobs include; Captains, Navigation Officers, Cargo Handlers, Engineers, Food Service Worker, Sanitation Employees, Ship Builders, etc.  In 2010, there were about 82,600 water transportation jobs held in the US. Most of these employees work within the following categories:


Water Transportation Jobs 

Category Type 

Percent of Industry

Inland Water Transportation


Support Activities for Water Transportation


Deep Sea, Coastal and Great Lakes Water Transportation




Scenic and Sightseeing Water Transportation


Source: US DOT


An employee who falls under  US Coast Guard regulations is, “a person who is on board a vessel acting under the authority of a license, certificate of registry, or merchant mariners document. Also, a person engaged or employed on board a US-owned vessel and such vessel is required to engage, employ or be operated by a person holding a license, certificate of registry, or merchant mariner’s document.”

All mariners working on ships with U.S. flags must have a Transportation Worker Identification Credential (TWIC) from the U.S. Department of Homeland Security. This credential states that a person is a U.S. citizen or permanent resident and has passed a security screening. If you are required to enroll for a TWIC card or TWIC card renewal and are in the Boston area, Occupational Drug Testing, a DISA company, has a TWIC Enrollment Center in Waltham, MA.


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