Utilize the input text as a context reference, choose the right relationship between Jamie Dimon and chief executive officer from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

How JPMorgan boss Jamie Dimon bucked convention to become a billionaire Life is getting better for middle-class households despite mounting income inequality, thanks to improvements in technology and cars, according to JPMorgan Chase chief executive officer Jamie Dimon.
position_held