Dr.P.Santhosh Rajan completed his Mds in oral and maxillofacial surgery in the year 2015 further which he had his one year surgery internship  programme in oral and maxillofacial oncology from the Shanghai Jiao Tong University. He is currently heading the oral and maxillofacial oncology unit at Penn nalam Hospital and aan nalam, chennai. He is also a consultant oral surgeon at Orthomed hospital, new lifemed hospital and billroth hospital chennai. He also practises as  junior consultant oral and maxillofacial surgeon at VS hospital Kilpauk , VHS and Right hospital.

With a huge passion towards oral cancer surgery his interest is in application of 3D computer based precise planning in oral cancer surgery and rehabilitation post surgery. @penn nalam and aan nalam centre is currently focusing on latest advanced surgeries for oral cancer focusing on post surgery rehabilitation also providing acceptable social life of oral cancer patients post treatment