Status Candidates, Merit Promotion, Current Federal Employees, Former Federal Employees, Overseas Employees, Former Overseas Employees, CTAP, ICTAP, VEOA, 30% Disabled, Schedule A, Individuals with Disabilities, Military Spouses, Land and Base Management, Peace Corps, AmeriCorps, Vista For definitions of common terms found in this announcement: http://dhsconnect.dhs.gov/org/comp/mgmt/dhshr/hr/Documents/JOA_Common_Definitions.pdf . Applicant must hold or have held a U.S. Merchant Mariner credential in the grade of First Assistant Engineer, Unlimited or higher or the equivalent military experience as assistant Engineer Officer/Chief Engineer or higher and as a qualified Engineer of the Watch on vessels of greater than 4000 HP or have been employed for two or more years as a subject matter engineer expert in the Mariner Training and Assessment Division at the National Maritime Center.