Passing motorists have offered the 58-year-old food, money, even employment, "but I just want my old job back", he said.
Mr Wallace, a truck driver with Allied Concrete for eight years, said he lost his job after getting angry at a client, for which he blamed himself.
"I got angry, but I will go to counselling and sort it out. I just want my job back."
With a wife and three children - aged 17 months, 3 years and 5 years - to support, he decided to head to the intersection of Andersons Bay Rd and the Southern Motorway on Wednesday at 3am to campaign to get his job back.
Since then, he has sat at his temporary home for 14 hours each day.
He smiles and waves at passing cars while holding a sign proclaiming his love for his family and former job before heading home at 5pm.
"It has been cold but I don't mind."
Not wanting to go on the unemployment benefit, Mr Wallace said he had been amazed by the offers he had received from passing motorists and the toots of support.
"I think more people should do this who want a job."
While he will not be at the intersection today - he will be refereeing some under-13 and under-18 rugby games - he plans to return to his temporary spot tomorrow and keep returning until he gets his old job back.
"I don't want to lose my family as well as my job. I want my job back."
However, that would be unlikely, and Mr Wallace should take any jobs on offer, Allied Concrete general manager Bob Officer said.
While the company was aware of his protests, it would not be taking him back.
