Federal loans get forgiven after 10 years if you don't make too much money and work for a state university. Does it count for professors?
"What are eligible jobs? In most cases, eligibility is based on whether you work for an eligible employer. Your job is eligible if you:
are employed by any nonprofit, tax-exempt 501(c)(3) organization;
are employed by the federal government, a state government, local government, or tribal government (this includes the military and public schools and colleges); or
serve in a full-time AmeriCorps or Peace Corps position."