'Experienced runner' missing in Sydney

A 26-year-old man described as an "experienced runner" has gone missing during a morning jog in Sydney's west.

Rhys Sutton left his Emu Plains house about 4.15am on Thursday in his running gear but failed to show up to work, prompting a search by police and the SES.

"The man is an experienced runner and has a good geographical knowledge of the area," police said in a statement requesting help from the public.