NCUA Public Affairs Specialist John Fairbanks later downplayed Matz's remarks on the matter.

"In response to a concern raised at the L.A. listening session, Chairman Matz acknowledged it is unfortunate whenever NCUA loses great examiners, especially after the agency invests time and money in their hiring and training process," Fairbanks said. "However, she is encouraged by the lower NCUA examiner turnover in recent years. The attrition rate has been pretty low."

According to the NCUA's Examiner Separation and Attrition Report, there were 594 examiners in 2012 and 62 left the agency that year, resulting in a 10.4% attrition rate. In 2013, the attrition rate dropped to 6.3% with 38 examiners leaving the agency out of a total 598.

As of July 31, 2014, 47 examiners had left the agency out of 578, which amounted to an 8.1% attrition rate so far this year, according to the NCUA. All of the figures included retirements.

The highest number of separations as of July 31, 2014, occurred among examiners that served between one and three years with the NCUA, for a total of 56. The second highest was among those serving between three and five years, for a total of 35.

"Most attrition happens in the first three years, which is to be expected. That's when employees in any organization are figuring out if this is the kind of job for them. Nearly all the attrition for long-term employees is through retirement," Fairbanks said.

Read more: Does the FDIC have the same  turnover rate?

In comparison, the FDIC has 1,990 authorized field examiners (non-supervisory) and most of those positions are filled, said David Barr, FDIC spokesperson.

In 2013, the FDIC's attrition rate was 5.9% with 117 examiners leaving the agency. In the same year, 42 examiners moved to other positions within the FDIC.

The year before, in 2012, the FDIC had an attrition rate of 6.2% with 123 examiners leaving the agency. In addition, 35 moved to other positions within the FDIC.

"We address this attrition and are able to keep most examiner positions filled by maintaining a group of financial institution specialists (examiner trainees) ready to step up when needed," Barr said.

Barr told CU Times the FDIC typically rotates examiners out of community institutions after every exam.

"That has nothing to do with turnover, but bankers are used to seeing different examiners each time. Plus, we may even alternate exams with the individual states – FDIC one time, the state the second time, etc.," he explained.

Barr said these examiners typically head to other community banks.

"The FDIC is the primary federal regulator for more than 4,200 banks. They are still examiners, but they won't necessarily examine the same institution two times in a row," Barr said.

During the NCUA's June 26 listening session in Los Angeles, Ron McDaniel, president/CEO of the $1.2 billion California Credit Union in Glendale, said his financial institutions had two great examiners that left for other agencies.

David Clendaniel, president/CEO of the $407 million Dover Federal Credit Union in Dover, Del., said his cooperative had the same lead examiner for a while but the other examiners on the team of approximately six has changed. He said the exam process lasts about a week and a half.

"We're examined by the Philadelphia group and they've been pretty consistent. I know they have had a few new hires," he said.

Clendaniel explained that sometimes the credit union's leaders follow the advice of one examiner and the next year a different examiner makes different recommendations.

"It poses some frustrations in the areas of judgment," he said. "It just changes marching orders."