Umar most recently served as an assistant coach and recruiting coordinator at Washington University in St. Louis for the previous two seasons.
Centre Stage will host six shows at the Playhouse, Pavilion, and downtown theaters, and tickets for the entire schedule will go on sale Monday, July 10.
"We take a lot of pride in what we do and we look forward to coming over and making people happy on gamedays."
The details of Lundy's contract have yet to be released, per Atlanta policy.
Pagliero has over 10 years of Division I hockey coaching experience and spent time on coaching staffs at UMass-Lowell, Colgate, and Holy Cross.
Pickett reportedly signed on to a four-year, $8.3 million deal with a guaranteed initial three years.