American engineering technician shakes around Air Force staff (9)
I believe the answer is:
draftsman
'american engineering technician' is the definition.
(US spelling of 'draughtsman')
'shakes around air force staff' is the wordplay.
'shakes' becomes 'DTs' (short for delirium tremens, medical shaking).
'around' indicates putting letters inside.
'air force' becomes 'RAF' (Royal Air Force).
'staff' becomes 'man' (manning is a kind of staffing).
'dts' going around 'raf' is 'drafts'.
'drafts'+'man'='DRAFTSMAN'
(Another definition for draftsman that I've seen is " One who draws up legal documents".)