Peter Dourmashkin, outgoing lecturer and an associate director of the Experimental Study Group, poses with the textbook he used while teaching 8.012 at ESG. After a 28-year tenure with ESG, Dourmashkin, who was also one of the principal investigators of the TEAL program, will continue to work in Physics Department. The ESG community held an appreciation party for Dourmashkin on Tuesday, Jan. 11.