Isometric 2D RTS Game Creator Application

Greetings. I'm looking for a programmer with a solid understanding of how real-time strategy (RTS) games work to help me create an application that will give me the ability to create an isometric 2D RTS game. The games developed from this application will be for commercial use, so it must support multiplayer and it must be designed to be compatible with Windows and MacOS. More specific details will be provided to the selected programmer, but the ideal game i'm looking to create utilizing this application is a 2D version of Rise of Nations and Dawn of War. Some of the game features this must have are resource-gathering, base-building, in-game weapon upgrades, control of units, Computer AI, etc...