Amaranayaka aziyang'anira ntchito zonse zonyamula anthu, ma misewu ndi ntchito zamakontrakitala pama eyapoti padziko lonse lapansi ku Hawaii. Adzakhala ndi udindo wa chitetezo, ntchito ndi kudalirika, kuphatikizapo kufika pa nthawi ndi kunyamuka, kunyamula katundu ndi utumiki wa alendo komanso kukhutira.
Amaranayaka adalowa nawo ku Hawaii atatha zaka 24 ku American Airlines, komwe adayamba ntchito yosungitsa malo ndipo adagwira ntchito zingapo pabwalo la ndege asanatsogolere zonyamula katunduyo pabwalo la ndege la Los Angeles International. Pa nthawi ya ulamuliro wake, adayendetsanso ntchito zam'tsogolo ku likulu la America ku Dallas ndi ma eyapoti akuluakulu, kuphatikizapo John F. Kennedy International Airport, Dallas Fort Worth International Airport ndi Miami International Airport.
Amaranayaka ndi womaliza maphunziro a McKinsey & Company's Black Executive Leadership Program ndipo adaphunzirapo kale mu Management Leadership for Tomorrow Career Advancement Program.
