GTC Biotherapeutics, a dynamic biotechnology company with headquarters in Framingham, Massachusetts, is the industry leader in the production of therapeutic proteins in the milk of transgenic animals. GTC Biotherapeutics is an Equal Opportunity Employer, and offers a comprehensive benefits package, including health, dental, and life insurance, three weeks' vacation, company stock options, tuition reimbursement, an employee stock purchase plan and a 401(k) investment plan.