Mund, who was voted on to the Board in 2012, is the second Board member to resign in just weeks, and the third member to resign this year.
Board member Chaim Rosenblatt resigned at the end of last month, and Yoni Silver resigned earlier in the year.
Mund, a senior, resides half the year in Florida, a Board official said, citing the apparent reason for the resignation.
Silver’s seat was filled by Tracy Tift, and the Board will now seek to fill the two vacated seats.
The Board has 65 to fill each seat from the time it’s vacated, officials said.
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