Mook, a former chairman of the Nevada Credit Union League and a veteran of Las Vegas-based Cumorah, is the new president/CEO of Alta Vista CU in San Bernardino.
Officials of the $157 million San Bernardino CU said Mook took over the Alta Vista job in mid October, apparently prior to the collapse of Cumorah and its purchase and assumption by Credit Union 1 of Rantoul, Ill.
Cumorah, serving the Mormon Church membership in Nevada, ran afoul of real estate-linked commercial loans and ran up losses as the Nevada economy continued to sink during 2008.
The Las Vegas credit union is privately insured by American Share Insurance, which helped arrange the takeover by Credit Union 1.
In a statement, Amy Brown, vice president of human resources and marketing at Alta Vista, said Mook succeeds Debra Grisamer, a long time CEO who left the CU earlier this year.
"The Alta Vista board and staff are very excited about Mr. Mook's presence, and we feel fortunate to have his credit union background and expertise on our team," said Brown.