Tiplady received the award for services to policing and for re-positioning the HR function as a driver for change and productivity within the force.
The Met Police has saved £40m over a three-year period after introducing new absenteeism arrangements and has also delivered £5m in savings by reviewing recruit training.
Tiplady said: “I am thrilled. It is not something I expected or even thought about but I am very pleased to be recognised in this way.
“HR is often criticised for the things they do, but I truthfully believe the Met has come a long way. I have been well supported by many able and skilled colleagues whom I really want to thank.”
Tiplady has also successfully increased diversity in the force so that now one in four officers are female and one in 10 are from a black or ethnic minority background.
The HR chief also introduced a new performance management system and pay structure for staff, as well as investing in an occupational health and wellbeing scheme to support officers and staff involved in the Met Police’s response to the 7/7 bombings in London.
Tiplady was appointed HR director of the Met Police in December 2001.