chair·man 
/ˈtʃeɚmən/ noun
plural chair·men /-mən/ /ˈtʃeɚmən/ noun [count] 1 : the person (especially a man) who is in charge of a meeting, committee, or event
▪ He's the new chairman [=chair, chairperson] of the task force on school violence. 2 : the person who is in charge of a company or organization
▪ the chairman of the airline company
▪ He's the new chairman [=chair, chairperson] of the task force on school violence.
▪ the chairman of the airline company
