Conversation so far:
who is the current director of fema is this person qualified for the position
Peter T. Gaynor was officially confirmed by the U.S. Senate to be FEMA Administrator on January 14, 2020. Gaynor has more than 11 years of experience in emergency management.
what was a previous role of Peter T. Gaynor prior to becoming FEMA Administrator
Prior to coming to FEMA, Peter T. Gaynor served as the Director of Rhode Island’s Emergency Management Agency (RIEMA) in 2015.
what were accomplishments of Peter T. Gaynor during his time as Director of Rhode Island's Emergency Management Agency (RIEMA)
Peter T. Gaynor oversaw response and recovery efforts to blizzards, floods, tropical storms and public health emergencies. He also coordinated evacuations, mass care, special events, and school safety.
who was the previous FEMA administrator prior to Peter T. Gaynor
Brock Long served as the Administrator of the Federal Emergency Management Agency (FEMA) until his resignation in March 2019. Brock Long was succeeded by Pete Gaynor.

Question: what was the reason for the resignation
Self-contained rewrite: what was the reason for the resignation of Brock Long as the Administrator of Federal Emergency Management Agency (FEMA)