No person who has wilfully defaulted on a National Direct Student Loan, a National Defense Student Loan, a Guaranteed-Federally Insured Student Loan, a Nursing Student Loan, a Health Professions Student Loan or a Law Enforcement Educational Loan shall now or hereafter be employed by the State or any of its departments, agencies or subdivisions until all defaults are cured and loan payments made current; provided, however, that if such person and his lender voluntarily enter into an agreement after default under which terms the debt will be repaid and the lender confirms this agreement in writing with the state agency, department or subdivision, the loan shall not be considered in default and the default shall be considered as cured so long as the person complies with the terms of the agreement.