"...Because of the bad economy, the limitations of federal retirement benefits, the housing crisis, ever-increasing health care costs and lengthening life spans, the phrase “retirement career” is no longer an oxymoron. But beware: Retirement careers often require long-term planning.
The first step for considering your options is to identify your earliest possible federal retirement date, based on your age and years of service.
If you’re a full-time fed and want to keep working for the federal government after reaching retirement eligibility, you probably have two main options: Continue your current federal career path, provided that your job doesn’t have a mandatory retirement age; or enter phased retirement, which would enable you to work part-time after retirement..."