Second officer

The second officer is the third-in-command aboard a starship or starbase, second in the command structure only to the commanding and first officers and holds the rank of commander or lieutenant commander.

This position is sometimes combined with other positions. For example, Montgomery Scott was the original USS Enterprise (NCC-1701)'s second officer and chief engineer. Data was the USS Enterprise (NCC-1701-D)'s operations manager and second officer, while USS Voyager (NCC-74656)'s second officer, Tuvok, was also the tactical officer. 

Starfleet procedure dictates the second officer should accompany any away team. 

Notable Second Officers

 * Mary Barranco
 * USS Pendragon
 * Kari Eriksson
 * USS Prospect (NCC-60056)
 * USS Prospect (NCC-60056-A)
 * Antonio Fernandes
 * USS Cantabrian (NCC-24705)
 * USS Cantabrian (NCC-24705-A)
 * Karen Howe
 * USS Gustav P. Remington (NX-86753)
 * Owen Kyle
 * USS Chimera (NCC-11555)
 * Mark Montgomery
 * USS Christopher Pike (NCC-72091)
 * Vaebn Mairex
 * RIS
 * Brianna Reiss
 * Atreides (post-2389)
 * Garav ch'Rimosi
 * USS Prometheus (NX-59650) (Prometheus)
 * David Stein
 * USS Justice (NCC-556)
 * Shrun
 * USS Valkyrie (NCC-2590)