Dallas City Manager Mary Suhm announced her resignation in a letter to the mayor and city council on Thursday morning.
The resignation is effective after the end of this year's budget process, which will likely be sometime in the second half of 2013.
Suhm has been city manager for eight years and has worked for the city for 35 years in various roles.
Suhm cites improved public safety, "an energized downtown," bond programs and the convention center hotel among her accomplishments while serving.
But in recent months, Suhm had come under fire for her role in a gas drilling deal. Suhm told the council in 2008 she would not work for drilling on public parks, while behind the scenes she told an energy company she would help them try to drill.
City officials have not discussed a timetable for finding a replacement for Suhm.
KDFW FOX 4
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