She joins Classic Stage Company after years as managing director of the new-play-focused Page 73.
After a year-long search process, Fadul joins Gillis, who has been serving as interim artistic director since William Carden stepped down last year.
Alapai will take part in a year-long leadership residency program.
The former Playwrights’ Center associate A.D. will join managing director David Lloyd Olson on the leadership team as of Feb 1.
Brewer is currently a producer at the theatre.
After 25 years in Minneapolis at a theatre he co-founded, Rothstein will succeed longtime artistic director Michael Donald Edwards at Asolo.
Smith takes up the newly created position after working at the Manhattan School of Music and New York City Opera.
Chang has been leading EDI initiatives at TCG since 2018.
Nile Harris and Talvin Wilks will join the artistic leadership team following the recent retirements of founder and artistic director Ping Chong and longtime executive director Bruce Allardice.
Managing director David Schmitz will depart, with artistic director Nataki Garrett taking the role of interim executive artistic director and Anyania Muse chief operating officer.