Most policies are written for 6-12 month terms so you could possibly purchase a policy and cancel when you no longer need it. A non-owners
policy will not cover damage to the vehicle you are driving, however, so you might want to see if your employer can add you to their insurance policy for more protection. In addition, if you are driving specifically for work purposes other than just a commute, you would need a business or commercial use policy as a personal auto policy would not provide adequate coverage. This particular situation is a bit tricky, but I think your best bet would be to get added as a driver to your employer's business/commercial policy. Best of luck!