strategist
🇺🇸
/ˈstrætədʒɪst/
🇬🇧
/ˈstrætədʒɪst/
someone who is very good at planning and making decisions, especially in business or politics.
The company's success was largely due to their head strategist.
会社の成功は主にその最高戦略責任者のおかげであった。