Starbase 39-Sierra is Starfleet's main hub for operations near and beyond the Romulan Neutral Zone.
Starbase 39-Sierra serves as an important Federation starbase near the Romulan Neutral Zone since at least the early 2360s. Over the past decades the starbase played a major role in Federation-Romulan relations and served as an intelligence base for Starfleet.
The starbase was also the hub for rescue and relief efforts after the destruction of Romulus by the Hobus supernova. As of 2409, it is commanded by Admiral T'nae, and the primary base of operations on the Romulan Front.
 Admiral's Office
- Lieutenant Marrien ( Mk I-X weapons, Mk I-IX personal equipment and kits, and consumables)
- Xeno ( Mk I-X personal weapons)
- Commodities Broker Temev (Commodities)
- Commodities Broker
- Lieutenant Sarissa
- Ensign Bariet Jaran (Bridge Officers)
- Damar Kahn
- Lieutenant Commander Brocal
- Ambassador Vimok
- Ensign Jessiek ( Mk I-IX starship weapons, components, and consumables)
- Lieutenant Synsa (Dilithium Equipment Vendor)
- Ship Selections Officer
- Shuttle Requistions Officer
 Missions Involving This Location
In February 2011, Starbase 39 recieved a new Admiral's Office. This was the same layout with different decoration as the Earth Spacedock Admiral's Office that existed until the 1 Year Anniverary Update in February 2011.
- Starbase 39-Sierra at Memory Alpha, the Star Trek Wiki.
- Starbase 39-Sierra at Memory Beta, the non-canon Star Trek Wiki.
|Hubs & Starbases in Star Trek Online|
|Federation||Social||Earth Space Dock • Deep Space K-7 • Memory Alpha • Starbase 39 • Starfleet Academy/Earth|
|Mission||Facility 4028 • Donatu Research Station • Starbase 24 • Starbase 82 • Starbase 114 • Starbase 157 • Starbase 234 • Starbase 236 • Starbase 375 • Donia Station • Korvat Medical Lab • Omar Station • Outpost Quebec Alpha • Penal Colony 47 • Tazi Space Station • Utopia Planitia Shipyards • Vulcan Space Dock|
|Klingon||Social||First City/Qo'noS • Ganalda Station|
|Romulan||Social||New Romulus Command/Mol'Rihan • Romulan Flotilla|
|Mission||Gasko Station • Rh'Ihho Station • Virinat • S'harien Station • The Vault|
|Other/Neutral||Social||Hathon/Bajor • Deep Space 9 • Captain's Table • Drozana Station • Lohlunat Festival/Risa • New Romulus Staging Area/Mol'Rihan • Q's Winter Wonderland|
|Mission||Deferi Outpost 3 • Empok Nor • Treasure Trading Station • Undine Base • Station Alpha • Suliban Helix|