The Navy has something called "COOL" which tries to map civilian certifications to equivalent Navy ratings and NECs, https://www.cool.navy.mil/ https://www.cool

The Navy has something called "COOL" which tries to map civilian certifications to equivalent Navy ratings and NECs, https://www.cool.navy.mil/ https://www.cool.navy.mil/ But I'm not sure how well it helps in practice, nor on whether other U.S. armed services have something similar.