Complex sentence: Barman graduated from IIM Lucknow in 1999 and moved to Pune, Maharashtra to work for Brainvisa Technologies along with his long time friend Kallol Banerjee, also an alumnus of IIM Lucknow.
Split into simpler sentences: Barman graduated from IIM Lucknow in 1999 and moved to Pune, Maharashtra to work for Brainvisa Technologies. In Pune, Barman met Kallol Banerjee who was also an alumnus of IIM Lucknow.