The email was obtained by Eyewitness News from sources close to the union.
It's unknown if the layoffs will be permanent. Wilkes-Barre leaders proposed a 30 percent tax hike for 2013. Some city council members have publicly rejected raising taxes to that degree. That has forced the city to look internally, with forecast layoffs across the city's four unions.
Bilski wrote in the email he would try and work with city council members to restore the positions in 2013.
An email message to Drew McLaughlin, spokesman for Mayor Tom Leighton, was not immediately returned.
It's not yet clear how the city's other unions are affected.