Zài gōngsī lǐ, tā zuǒyòuféngyuán, shéi dōu bù dézuì.
At the company, he plays both sides skillfully, never offending anyone.
Tips
history
From 《孟子·离娄下》: 资之深，则取之左右逢其原 - 'When learning runs deep, drawing on it left or right finds the source.' Mencius originally meant deep mastery; modern usage drifted toward 'working all angles.'
usage
Two flavors: (1) genuinely competent - handles everything well from all directions; (2) slick or two-faced - always positioning to benefit. Context (and tone) decides whether it's praise or criticism.
