The Navy Enlisted Classification (NEC) system supplements the enlisted rating structure in identifying personnel on active or inactive duty and billets in manpower authorizations. NEC codes identify a non-rating wide skill, knowledge, aptitude, or qualification that must be documented to identify both people and billets for management purposes.
For example, if a Navy police officer ( MA -- Master at Arms ) receives specialized training as a K-9 Dog Handler, he/she would be awarded NEC MA-2005. From that point on, the sailor could be assigned to Navy law enforcement duties involving military working dogs.
Below are the NECs for the BUILDER community area:
BU 5907 - 5915
NOTE: Personnel attached to the Reserve Naval Construction Force (RNCF) are awarded NECs BU-5907, BU-5908, and BU-5915 based on the recommendation of individual Commanding Officer of RNCF units and the approval of the Commanding Officer, Naval Reserve Personnel Command (NRPC) in lieu of completion of applicable courses.
BU-5907 Advanced Builder (APPLIES TO: BU )
BU-5908 Tool and Equipment Technician (APPLIES TO: BU )
BU 5915 Construction Planner and Estimator Specialist (APPLIES TO: BU, CE, SW,UT, EO)
BU-5931 Advanced Underwater Construction Technician (APPLIES TO: BU, SW, CE, UT, EO, CM, EA, CU, UC, EQ )
BU-5932 Basic Underwater Construction Technician (APPLIES TO: BU, SW, CE, UT, EO, CM, EA )
BU-5933 Master Underwater Construction Diver (APPLIES TO: BU, CE, CM, EA, EO, SW, UT)

