Presolicitation DEPT OF DEFENSE DEPT OF THE NAVY is seeking Contractor Instruction Services (CIS) in support of Chief of Naval Air training (CNATRA) at NAS Corpus Christi, TX, NAS Kingsville, TX, NAS Whiting Field, FL, NAS Pensacola, FL, and NAS Meridian, MS. The period of performance is 60 months, inclusive of two (2) month mobilization and one (1) seven (7) month base year with four (4) twelve (12) month options and one (1) three (3) month option. Start of contractor performance will be 01 April 2018.