In this August 2010 file photo Tucson City Manager Mike Letcher listens during a council meeting discussing the Sun Tran strike.

Greg Bryan/Arizona Daily Star, File

Tucson City Manager Mike Letcher has resigned.

Letcher notified city officials via email, saying his resignation will be effective in August 2012.

Rumors that Letcher's job was at risk have swirled at City Hall since two council members called for his termination over the recent publicity over major management problems at the city's parking authority ParkWise. He also was criticized over the problematic implementation of the city's new 911 system, which had been plagued with dropped calls and technical malfunctions as well as morale and staffing woes.

Letcher has held the city's top post since 2009. Letcher was hired after four council members voted to fire former City Manager Mike Hein two weeks earlier, after the council reviewed Hein in closed session.

Letcher's resignation notice obtained by the Star notes his work with the mayor and council to maintain core city services through difficult financial times as well as a significant cut to the city's workforce. He says waiting a year for it to be effective will let him complete another budget cycle and give the council plenty of time to find a replacement.

Letcher asked for a job performance review in June, following some criticism on the council about his leadership. He has enjoyed strong support of Councilwomen Karin Uhlich and Regina Romero, and limited opposition from other council members.

However, Councilman Steve Kozachik has expressed repeated public concerns about Letcher's leadership.

Letcher was a finalist for the job in 2004 while working as a deputy city manager, but Hein was selected instead.

He has more than three decades in city management in six cities.