Having accepted an offer, you have made a contract with an employer and you are then obligated to withdraw from all other job search activities. It is not ethical, nor is it good for your reputation and integrity, to accept a job offer and then renege because a better job has come along. This reflects very poorly on students and University as a whole. If you have any questions about the timing of your response, ask a career counselor. While you might be anxious about not having a job by graduation, the majority of Penn students who want to find employment do within a few months after graduation.
Persistence pays dividends.
Please let us know how things are going. Let us help you in your decision-making process, so that you can exercise as much control as possible at this important time. And from all of us at Career Services and OCRS, best of luck with your job search. . Not to copied or distributed without permission.