Hey as per my idea head office of CMC Limited IS IN Delhi and here I am giving you its details

About CMC Limited
CMC Limited is an limited company which deals in Information Technology services, consulting and software. It is a part of the TATA Group and is a subsidiary of Tata Consultancy Services. It was incorporated in 1975 and later on in 1977

Contact Email
lh_corp@cmcltd.com

Services
CMC later expanded its services to systems integration, interfacing, installation, commissioning, software development, as well as education and training. CMC's R&D facility was set up in 1982 at Hyderabad.[9] CMC was renamed CMC Limited(Computer Maintenance Corporation) in August 1984.

Address
CMC Limited
PTI Building,
5th Floor,
4 Sansad Marg,
New Delhi-110001,
India.