We lost the only other senior windows admin, like myself, this year. I inherited all of his projects: Brand new Office 365 transition, still in hybrid, and brand new email filtering solution on top of that. I am now 100% responsible for all Enterprise apps: Deltek (Financials) + Unanet (Cloud-based. Supposed to be a replacement that they didn't talk to IT about, didn't do their due diligence, then found out it can't be a full replacement!), ADP Cloud service transition, then manage users/permissions, Xerox DocuShare instance that I didn't help setup and everyone has left who did, Exchange 2007/2010/O365 in hybrid, the main MS SQL Server running all our DBs + 1-2 extra running validation apps, Enterprise Antivirus (SEP), Enterprise config management (Altiris, that I am finally trying to upgrade - again), IT HelpDesk that I am looking to replace with a cloud solution (FreshService), all Mac infrastructure (eventually to be managed by Altiris), researching our remote control tool replacement, and finally, overseeing a team of 2 - soon to be 3 - support Admins. Oh, also our VMware deployment: 5 node cluster for production and validation, 2 node cluster for DMZ, and 5 node cluster for VDI; plus a host here and there at satellite sites. No one - maybe on purpose - had run a cost analysis on VDI. I plan to kill it in the next 12-24mo as our NetApp backend is coming up for support soon (same time line). I may also kill off VMware in favor of Hyper-V since we will already be licensed for the hosts (this also hadn't been done since we went virtual - thank god we never got audited) and the load is slowly shrinking as we kill off old apps.
Also, just because I am a glutton, we waste something like 30% of one of my support admins on video conferencing support. For that and other reasons, I have been in the Skype for Business beta and will be testing their Cloud PBX solution starting in January in an effort to get off Cisco Call Manager and Polycom Video Conferencing. Also, after my O365 training this year, I was approached with a request to leverage our SharePoint Online subscription, so I am studying that at the moment, because the requesters are sitting on a very large grant we just got and need an externally available collaboration tool. I hope to parlay that into a replacement for DocuShare, because I despise the 3rd party we go through for support/anything.
The good news, while I was just promoted this year to Manager, in March, I was promoted again to Senior Manager of IT (with talk of Director in a year or two), so have radically increased my salary this year; plus a few extra days off. I have also already been doing 75% of this work since I saw this day coming a few years ago, so I am used to it. Once I can completely hand off config management, antivirus, and remote control to the lower admins I can forget about those annoyances for good, then I can tackle the infrastructure projects that need to get done, badly.