1) An expert in strategy 2) Campaign pro 3) Contriver 4) Deviser 5) Planner 6) Strategian 1) Strategian 2) Tactician 
A strategist is a person with responsibility for the formulation and implementation of a strategy. Strategy generally involves setting goals, determining actions to achieve the goals, and mobilizing resources to execute the actions. A strategy describes how the ends (goals) will be achieved by the means (resources). The senior leadership of an org...
• (n.) One skilled in strategy, or the science of directing great military movements.
Strat'e·gist noun [ Confer French stratégiste .] One skilled in strategy, or the science of directing great military movements. 
[n] - an expert in strategy (especially in warfare)
strategist Someone who can develop and execute an effective strategy, especially for winning a war.
strategian noun an expert in strategy (especially in warfare)
an expert in strategy, esp. in warfare: Julius Caesar was a great military strategist.