Griffiths, most recently chief operating officer for the London Underground at Transport for London, will be responsible for the safe and secure day to day leadership of the airport whilst it undertakes its biggest ever capital programme.
He will report directly to the airport's chief executive, Ken O’Toole, when he takes up the role on October 15.
O’Toole said: “Steve joins Stansted at the most excitingperiod in our history – we are the fastest growing major airport in the UK, have just embarked on a transformational £600 million construction programme and continue to attract new airlines, and support the growth of existing partners, to serve the vibrant London market and burgeoning Eastern England region.
“I am confident that Steve will bring the energy and experience required to build on the great foundations that exist at Stansted and I look forward to working with him as the airport continues its upward trajectory."
Griffiths noted: “The opportunity to join London Stansted in the next stage of its development is really exciting and I’m looking forward to working with Ken and the team to drive the business on and ensure all those using the airport have the most seamless and enjoyable experience possible.
“It is clear that Stansted has huge potential and my role will focus on working with the talented team and with our partners and stakeholders across the airport, to deliver unrivalled customer service in a safe and efficient operating environment.
"In doing so we will enable London Stansted to continue to be the fastest growing airport in London over the next 10 years, a period during which we expect more than 50% of all of London’s air traffic growth to come through London Stansted.”