He has no credentials other than being associated with the Clintons - he was the pinhead who, once placed in charge of FEMA in 1993, promptly botched its handling the Mississippi River floods in North Dakota, South Dakota, Nebraska, Kansas, Missouri, Iowa, Wisconsin, Minnesota, and Illinois.
But you're right - she won't fire him because right now, she can't. Whether she likes it or not, the Clintons own her soul. Going to work for them is generally a one-way trip.
she'll have to go into the Identity Protection Program now that she has sold her soul to the Clintons