Nope, COA (as well as CNV, CAF) have a Secretarial (i *think*
that's what the S stands for) Advisor (SA) which holds a rank of
CPT. And his primary job/role is to craft out COA's staff papers
and generally has the duty of being an executive assistant. This
appt is a staff appt but obviously has its advantages due to the
exposure one receives as opposed to being a Staff Offr in a
GS/SSSO/Div. SAs can be spotted by the golden lanyard worn on his
#3, also known as his leash!
CDF's assistant has a MA (Military Advisor?) and his rank is
generally an LTC.