Mr.Tiwari started his professional carrier with brief stint in ITI in the year 1971. He joined the DOT during the year 1972. He continued for 4 years in DoT and upon successfully completing Engineering Service Examination conducted by the Union Public Service Commission during the year 1975, was selected as a Class-I officer and joined at Arvi Branch of the then Overseas Communications Service (OCS) in the year 1976.
Currently, Mr. Tiwari is the Chief International Facilities Officer of TATA Communications.
Widely traveled, Mr.Tiwari has visited several countries to represent
TATA Communications (erstwhile VSNL). He also led VSNL (now TATA Communications)
delegations to many countries to further the interest of organization
in the field of International communications.