Cella is an award-winning leader in consulting, staffing and managed solutions. Are you looking for a single proposal development consultant? An entire team? Cella is the only proposal development provider to win the Best of Staffing® Award Client and Talent awards for multiple years running. We deliver experienced proposal consultants for federal, state and commercial contracting efforts. We understand that one-size-fits-all solutions are only myths, which is why we are intentionally flexible – to fulfill any, and all, of your needs.