Mahanagar Telephone Nigam Limited (MTNL) has appointed P.K. Purwar as chairman and managing director (CMD) of the company. Purwar, who has been ap­p­ointed CMD for a period of five years, is currently serving as director, finance, at MTNL. He had held additional charge as CMD between June 2014 and June 2015, and again in June 2016.