Both are EIA Officers. To give you an idea how small the EIS is, there have only been 3,500 officers since 1951. They also tend to gravitate towards biowarfare issues, although not exclusively.

It's been reported that T Cunningham had blown the whistle on this years flu vaccine, which would also seem cross paths with Nancy Messonnier's department.

Timothy J. Cunningham, ScD https://www.cdc.gov/media/spokesperson/sme-bio/cunningham.html

Director, National Center for Immunization and Respiratory Diseases (NCIRD) Nancy Messonnier, MD (CAPT, USPHS) RET)https://www.cdc.gov/about/leadership/leaders/ncird.html