One was an experienced parachuter. The other, was just starting out. But together, they shared a passion for the sky.

Adrian Lloyd and Mario Low Ke Wei, 29, plunged to their deaths on at Wilton yesterday, 85km south-west of Sydney.

A Saturday afternoon jump, turned disaster, at the end of tree lined driveway.

Today, Sydney Skydivers grounded their operations.

In a statement this morning, the company said the jump the men were undertaking "was not particularly challenging for a highly experienced instructor."

Lloyd, who was aged in his 60s, was extremely knowledgeable, with nearly 10,000 skydives and almost 30 years of experience in the sport.

Low Ke Wei, was new to the sport and had been undertaking his first orientation jump.

9NEWS understands the Singaporean national had only recently moved to Sydney for work.

Moments before the accident, the pair were caught in a candid moment, on Dustin Leonard's GoPro, as their light aircraft circled above green paddocks.

Leonard today told 9NEWS he was "shaken-up" after the event.

"The whole plane ride, everyone was nice, chipper, nice calm flight, going up. we got to altitude, like 13,000 feet, and everything was very standard,” he said.

“It's quite a shock."

"You knew just by the look on their face, you knew something was wrong."

In an industry where even one fatality would be considered a flaw, it's expected Sydney Skydiver's is bound to come under renewed and intense scrutiny.

This their sixth fatal incident in the past 16 years.

Two men losing their lives in 2001. A further two, plunging to their death in 2012.