He took over as the 18th Chief of Air Staff (CAS), PAF on 18 March 2006, when the previous chief completed his three-year term. Having been in the office of Vice Chief for well over two years, Tanvir was ready to role out his vision and plan for the PAF for the next three years. His vast and varied experience helped him in preparing a thorough and very ambitious plan for the PAF. He wished to see the PAF truly transitioning into the 21st century along with procurement of essential hardware and development of infrastructure. His motto for the PAF was To-do-more-with-less and build PAF as a lean, very efficient and hard hitting Air Force. Towards these objectives, he launched a massive drive to bring the entire working/functioning of the PAF online and fully integrated. Procurement of new generation F-16s (Block-52), Spada SAMs, Chinese AWACS, Swedish AEW&C, locally upgraded/maintained and operationalized Air Defense system, Retrieval of Peace Gate-IV F-16s from the USAF, complete upgradation of older F-16 fleet to most modern version, procurement of highly potent Beyond Visual Range AAMs along with host of other weapons from the US, High Tech Simulators, induction and local manufacturing capability of UAVs, a highly versatile Automated Inventory Management System and local manufacturing of Block-1 of the JF-17 weapon system were some of the major inductions that were contracted by him and in due course inducted in the PAF. Other than these new procurements to make PAF a very potent force, Tanvir was also responsible for operationalization of strategic capability for the PAF. This he achieved over a period of five years while concurrently holding the position of DG, AWC along with his primary responsibilities in the PAF. In addition to the above, Tanvir focused on developing and upgrading physical infrastructure, both operational and domestic. He especially built a lot of accommodation for the low paid employees in addition to building a major new air base for housing of new F-16s and upgrading Skardu as a fully functional air base. He had a keen eye for the welfare of PAF personnel and built hospitals in Karachi and Lahore. By bringing the PAF online, he streamlined all of the budgeting, logistics, procurements and accounting systems of the PAF.
Criticism of US drone attacks inside Pakistan Air Marshal Tanvir Mahmood Ahmad during his tenure expressed
PAF's capability to be able to stop US drone attacks inside Pakistan as he considered it a violation of Pakistan's sovereignty. However, in his opinion such military actions needed approval from the government, before
PAF could go on to take such action. Saying at one point: "The decision as to whether or not we want to start a war [with the US] will have to be made by the nation and the government."
National Girl Child Day photograph Air Chief Marshal Tanvir Mahmood Ahmad appeared in a full-page newspaper advertisement (see External Links below) taken out by the government of India's
Ministry of Women and Child Development to mark the
National Girl Child Day.
Krishna Tirath, Minister of Women and Child Development, apologised on behalf of her ministry for publishing a photograph of a former Pakistan Air Force chief in a government advertisement and said an inquiry will ascertain who was responsible for it. Ahmed, upon learning of the publication, "wasn't aware about this [and felt it was] an innocent mistake". == Awards and decorations ==