Facebook Tech Ops Exec Jonathan Heiliger to Depart by End of Summer

After four years leading Facebook’s infrastructure development, vice president of technical operations Jonathan Heiliger is stepping down, according to GigaOm. Having joined Facebook when it had well under 100 million users, he’s overseen the expansion of software, data center and server technology to manage the site’s huge growth over the years — it now has around 700 million monthly active users worldwide.