At employers where I trust the hardware not to be compromised I happily use my personal accounts. At my current place IT support can't easily get root access on

At employers where I trust the hardware not to be compromised I happily use my personal accounts. At my current place IT support can't easily get root access on my machine (at least without an audit trail) so I feel okay to enter my personal account's credentials into the work machine. If your IT staff has full remote root access on your machine I would avoid this though - they can easily key log your password or add a root certificate to break HTTPS and get access to your personal account's password, and from there all hell can break loose.