Hello drjazz,
here my solution:
osTicket Version v1.9.14 (8b927a0) — Up to dateWeb Server Software Apache/2.4.10 (Debian)MySQL Version 5.5.50PHP Version 5.6.24-0+deb8u1
1. Add a new column in ost_staffsee 01.jp
2. Edit \upload\include\class.staff.phpsee 02.jpg and 03.jpg
3. Edit \upload\include\staff\staff.inc.phpsee 04.jpg
4. Edit \upload\include\staff\profile.inc.phpsee 05.jpg
5. Edit \upload\scp\profile.phpsee 06.jpg
6. Edit \upload\include\staff\tickets.inc.phpsee 07.jpg
7. Edit \upload\include\staff\header.inc.phpsee 08.jpg
8. The Result :-)see 09.jpg and 10.jpg