Big 4 and SAF comparison:

Year
3: SA1 - Captain
4: SA2 - Captain
5: AM - Captain
6: M1 - Major
7: M2 - Major
8: M3 - Major
9: SM1 - LTC
10: SM2 - LTC
11: SM3 - LTC
12: SM4 - LTC
13: D1 - SLTC
14: D2 - SLTC
15: D3 - SLTC
16: Junior Partner - Colonel
XX: Senior partner and above - BG and above