Both presiding officers of the Maryland General Assembly are about to lose valued senior staff members.

John F. Favazza, one of two aides with the title of chief of staff to Speaker Michael E. Busch (D-Anne Arundel), is stepping down to join the Annapolis lobbying firm of Manis Canning & Associates.

That move was announced Monday, a week after word started circulating that Patrick H. Murray is leaving his post as deputy chief of staff to Senate President Thomas V. Mike Miller Jr. (D-Calvert) for a job as director of state government relations at Johns Hopkins University.

Favazza has worked beside Busch for more than a decade, dating to the lawmaker’s days as chairman of the House Economic Matters Committee. Both Favazza and Kristin F. Jones currently carry the title of chief of staff in Busch’s office.

Favazza’s portfolio has included gambling, energy and environmenal issues.

His move will further bolster the reputation of Manis Canning & Associates as a firm with close ties to Busch. Nicholas G. Manis, the firm’s managing partner, was coached by Busch in high school basketball.

“John has a fundamental knowledge of key state public policy issues and extensive experience working with the Maryland legislative and executive branches,” Manis said in a statement Monday. “His reputation for integrity and his outstanding work ethic precedes him – our clients will be happy to have him on their side.”

Murray, who has spent six years working in Annapolis, was part of Busch’s staff before joining Miller’s team.

“While I will miss the President’s Office, I look forward to going to work for Johns Hopkins — one of our nation’s preeminent institutions, and a leader in the academic, medical and research fields,” Murray said in an email that circulated last week.

He joins a growing stable of former Miller aides who have gone on to work as lobbyists and in other positions that capi­tal­ize upon their time spent with the Senate president.