Niemeyer has been with the village since 2014.
In a press release, village officials praised Niemeyer's role in helping local businesses weather economic hardships caused by the pandemic.
The release states Niemeyer's accomplishments included overseeing the development of three new TIF districts and supervising cultural projects to bring more development and revenue downtown.
The Tinley Park Village Board is expected to name Assistant Village Manager Pat Carr as Niemeyer's replacement, according to the release.
Niemeyer will retire in October.