Administrative Assistant. Location: Pasadena, CA. Business: Construction Management. About Citadel. A fast growing, Owner Representative Construction Management firm who have been serving clients since 2006. Citadel has offices in Pasadena, Fullerton, Long Beach, Sacramento, and Riverside, California, as well as Phoenix, Arizona. and has field staff at numerous project locations. Citadel has been built on a set of three principles that form our c...