Emblem of the Galactic Dominion
|Headquarters:||unknown, Gamma Quadrant|
The Galactic Dominion is a major interstellar state in the Gamma Quadrant. They are technologically advanced and millenia old. The Dominion is known to consist of three main species. The Founders who are the leaders of the Dominion, the Vorta who serve many rolls including diplomacy, tactics, and as lieutenants to the Founders to oversee the Jem'Hadar. The Jem'Hadar are the soldiers of the Dominion.
Note, as of Stardate 119063.0 in WNO canon, it is not common knowledge that the Founders and the Changelings are the same species. Only a select few Starfleet personnel have witnessed a changeling morph into a Founder.
Galactic Dominion on Memory Alpha