Federal Employees' Compensation Reform Act of 2011 - Requires federal employees, including postal employees, who are receiving total or partial disability benefits under the Federal Employees Compensation Act (FECA) to convert to the federal retirement system when such employees reach retirement age as defined by the Social Security Act and are otherwise eligible for an annuity under the the Civil Service Retirement System (CSRS) or the Federal Employees Retirement System (FERS).