The $217 million Massachusetts credit union had been running on Fiserv's DataSafe system.
Fiserv and Symitar dominate the credit union core processing business above and below the $1 billion mark.
EVP taking over Kentucky-based $1.1 billion credit union after CEO of 23 years retires.
Michigan CUSO is service bureau for Symitar Episys core platform users.
California credit union had signed for the Acumen platform before Fiserv left that core behind after Open Solutions buy.
The $57 million, 8,600-member Ascension Credit Union in Gonzales, La., plans to convert its core processing this year to the iPower platform from EPL Inc. of Birmingham, Ala., the CUSO and credit union said.
Four credit unions with combined assets of nearly $1B will convert to the account processing platform.
Former EVP Patterson will replace Jon Jeffreys, who was named a managing partner at Callahan & Associates and will remain on the CUSO's board.
$57 million Louisiana credit union will outsource daily operations to CUSO EPL and gain shared branching and mobile banking services.
Utah CUSO says conversion calendar now full into 2015.