Simon John Mariani, 28, was struck July 8 during a competition at the Ballyowen Golf Club in Hardyston, New Jersey.
The 28-year-old victim was taken to the hospital after the incident but died this past Monday.
Mariani was participating in an all-day golf competition when he was struck by the bolt of lightning, Brian Delia, a fellow golfer who witnessed the strike, said last week.
Delia -- who did not know Mariani -- captured the stormy clouds on camera while at the 14th hole and ran to the clubhouse for safety once the lightning struck.
Before authorities arrived on the scene, Delia said Mariani's father -- whom he had been playing with -- was administering mouth-to-mouth while other golfers were providing CPR.
The 28-year-old was working as an associate at MTS Health Partners in New York City and was described as "driven, dedicated, smart" and "exceptionally talented," his obituary read.
He "embraced all things family," loved Taylor Swift and had the "heart of a Champion," according to his obituary. Mariani is survived by his parents, two sisters and "many cherished family members and friends who will forever hold his memory close to their hearts," the obituary read.
Mariani's wake will be held Thursday followed by funeral services Friday.
(ABC News contributed to this report.)
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