Assume that your workplace blocked any traffics other than HTTP or HTTPS so that you can not unfortunately use ssh. This is how to avoid the situation by encapusulating ssh trafic over OpenVPN using OpenVPN connect, which is an Android Application.

1. Download OpenVPN connect from google play.
2. Download a openvpn setting file from http://www.vpngate.net/
3. Import it from OpenVPN connect.
4. Connect! Basically that is it.
Easy but very powerful and you can go anywhere. All connection is done via https (port 443) so that you can bypass any nasty blocks by your workplace proxy.