The reasons for remaining in the workforce — or going back to it — vary. Most people who work beyond retirement age — which is 65 years old, according to the U. Here are six popular jobs for people 65 and older. Accounting and bookkeeping clerks use specialized computer accounting software, spreadsheets and databases to post financial transactions and produce financial reports, such as balance sheets and income statements. Rather than filling a full-time position, many companies will find a consultant to help with a specific project. This can be an excellent way to put your decades of experience to work without committing to a full-time job.