Senior IRS officer S S Rana has been made in- charge of vigilance and personnel in the Central Board of Direct Taxes.

At Rana's instance, some commissioners with proven track record have been appointed in prime posts in Mumbai, sources said. Those brought in are Shreekant Chatterjee, G S Singh, Usha Nair and T Sasikumar.

In February, Rana was shifted to an insignificant post because he objected to some officers' names being considered for director general of investigation, Mumbai, sources said. Following his objections, the DG post was kept vacant for eight months. Of the contenders, Swatantra Kumar was appointed DG last week."Senior officers, chief commissioner T K Shah and Ahmedabad DG A K Jain were also considered. But Rana objected to Jain's appointment and the process was stalled.''