Philip Greenspun has been in and around the Massachusetts Institute of Technology since 1979. He alternates between teaching traditional electrical engineering classes and teaching "Software Engineering for Web Applications" (6.171), a course that he co-developed with Hal Abelson. This has been a successful course at MIT and is being used by computer science departments at 20 other universities around the world. Greenspun is the author of two textbooks used at MIT, including Internet Application Workbook (available at http://philip.greenspun.com/internet-application-workbook/).
Greenspun holds an Airline Transport Pilot certificate. He has flown light single-engine aircraft to every corner of the North American continent. Greenspun teaches helicopter and airplane instrument flying at Hanscom Field near Boston.
In the mid-1990s, Greenspun founded the Scalable Systems for Online Communities research group at MIT and spun it out into ArsDigita, which he grew into a profitable $20 million (revenue) open-source enterprise software company. The software is best known for its support of public online communities, such as www.scorecard.org and photo.net, which started as Philip Greenspun's home page and grew to serve 500,000 users educating each other to become better photographers.