Senior Lieutenant Colonel (SLTC) is a Senior Officer rank in the Singapore Armed Forces, ranking just above Lieutenant Colonel and below Colonel. The new Senior Lieutenant-Colonel rank will designate those who have been tapped for higher appointments in the army, navy and air force. The insignia for the new rank will be two Singapore State Crests and a pair of laurels.
| NATO rank code | OF-1 | OF-2 | OF-3 | OF-4 | OF-5 | OF-6 | OF-7 | OF-8 | ||
| Rank | Second Lieutenant | Lieutenant | Captain | Major | Lieutenant Colonel | Senior Lieutenant Colonel | Colonel | Brigadier General Rear Admiral (one star) |
Major General Rear Admiral (two star) |
Lieutenant General Vice Admiral |
| Abbreviation | 2LT | LTA | CPT | MAJ | LTC | SLTC | COL | BG RADM |
MG RADM |
LG VADM |