Rossiter missed his braking point when returning to the pits following an installation lap on the third morning of pre-season testing in Spain.
After failing to stop in time in front of the garage, he clouted the mechanic who was holding the front jack, throwing him into the air.
The mechanic was taken for medical checks, but a team spokesman confirmed that he has been given the all clear, but was bruised and shaken.
Rossiter was able to resume testing and is pencilled in to run all morning, before handing the car back to Paul di Resta for the afternoon session.
