"Our farmers need support and I want them to know that they are not alone,” he said. “We will face the hardship together."
Mr Nassif arrived in Australia in 1987 after fleeing unrest in Lebanon.
Holdmark is now one of Australia’s largest property groups.
The Small Business Award went to Wayne Quach, the owner of Northern Territory-based agricultural company Pine Creek Mango Plantation, considered one of the territory's top tropical fruit producers.
Mr Quach fled post-war Vietnam at the age of 17 and said the advice his grandfather gave him upon leaving has motivated him during his business ventures.
"He said ‘remember freedom is priceless'. If you find your way to freedom, you wake up every morning at 5am and go out and work ethically and pay yourself and smile.
“You know every step of my life, when it came to moving to another country, language barriers, school dropout, all kind of problems... every time I think about going back, I think about my grandfather.”
The 2019 Indigenous Person in Business Award went to Narelle Anderson, the founder of Envirobank Recycling, a Sydney company incentivising bottle and can recycling.
"This place that we've all come to call home, Australia, is made richer by the tapestry of Indigenous Australians and migrant workers together,” she said.
“I am humbled by the recognition and gratefully accept the responsibility that comes along with tonight's accolades.”
Dignitaries to attend Monday's ceremony included Prime Minister Scott Morrison, New South Wales Governor Margaret Beazley and Labor MP Andrew Giles, who was there representing opposition leader Anthony Albanese.
"This is a really special night, it's a night to acknowledge those who have come to Australia not to take a contribution - but to make one,” Mr Morrison said.
“Their story has become a part of the great Australian story and it is something that we can all celebrate."