Did you try --user in the systemctl command, as root?
nemo ~ $ systemctl --user status rockpoold rockpoold.service - Rockpool daemon for Pebble smartwatches Loaded: loaded (/usr/lib/systemd/user/rockpoold.service; disabled) Active: active (running) since Thu 2016-03-03 21:59:20 GMT; 29min ago Main PID: 1095 (invoker) CGroup: /user.slice/user-100000.slice/user@100000.service/rockpoold.service └─1095 /usr/bin/invoker -o --type=qt5 /usr/bin/rockpoold