high·er–up 
/ˌhajɚˈʌp/ noun
plural high·er–ups /ˌhajɚˈʌp/ noun [count] informal : a person in an organization or government who has a lot of power and authority
▪ Her hard work and clever ideas impressed the higher-ups and earned her a promotion.
▪ Her hard work and clever ideas impressed the higher-ups and earned her a promotion.
