In his career, Mark Bronner has worked across a variety of fields. He has worked in labor, construction, investments and diamonds. Mark Bronner has been a diamonds professional for 20 years.

Bronner has spent his whole life on the east coast. He spent his early years in the Philadelphia suburb of Downingtown, Pennsylvania. Growing up, Bronner had five brothers and sisters. Bronner looked up to his parents a lot; his father was a professor at Penn and his mother worked at St. Joseph’s Hospital.

The Bronner boys knew the value of hard work. Starting in high school, all the Bronner boys worked construction at Daniel J. Keating full time when they were not at prep school.

Following in his three brothers’ footsteps, Bronner enrolled at Malvern Prep. Not intending to play tennis like his brothers, Bronner turned to Lacrosse. He earned a partial scholarship to the University of Delaware.

Henry Wilson, former teammate of Bronner at Deleware, approached Bronner with an opportunity to expand.

With his partner, Mark Bronner entered in the new and strange diamond business. At first, the pair operated exclusively in Philadelphia as a diamond retailer. Bronner moved north to the New York City area in the early 1990s. The main arm of his business, in the Big Apple, has been a mainstay ever since.


At the University of Delaware, Bronner became interested in investing. He interned at financial firms in the summers. He earned a bachelors degree in business at Deleware.

Keating Construction, his high school employer, hired Mark Bronner after Bronner graduated Deleware. Mark Bronner worked to expand the Keating footprint significantly. He also improved efficiency in a supply-chain associate position in his early years with Keating. Bronner later was promoted to a management role. Mark Bronner worked in the acquisition of some smaller construction firms for Keating in his new role.

Bronner moved to a career in personal investing, noting his instinct to recognize sound business. He started by funding fast-food chains in the Philadelphia suburbs. Bronner diversified by getting into energy investments.