After 38 years of working at MIT, including 16 years as administrative assistant to Professor Nigel Wilson and the Transit Research Group, Ginny Siggia will retire at the end of the year. “I love to travel and this job has been great training for becoming familiar with new transit systems,” she said. “The group’s 10-year Tren Urbano project in San Juan, Puerto Rico, was particularly memorable.” She plans to move closer to her daughter and family in southwest New Hampshire and notes that her toddler grandson’s “analytical evaluation of the world suggests that engineering might be a suitable profession” for him.