Organised by the St Vincent de Paul Society, all monies raised help fund Vinnies' homeless services.

So far, almost $4 million has been raised. Allens Arthur Robinson chief executive partner Michael Rose is the leading legal fundraiser, with more than $30,000 - just pipping West Australian Governor-designate, Malcolm McCusker QC and his wife, Tonya, who have raised in excess of $29,000. Slater & Gordon managing director Andrew Grech has collected over $10,000, while Clayton Utz partners Kate Jordan and Nikki Robinson have raised a combined total of nearly $20,000.

Norton Rose partners David Cross and Mitchell Mathas also partcipated.

"For several years, my family and I lived around the corner from the Matthew Talbot Centre in Woolloomooloo," said Robinson. "The homeless men who live in the streets around the centre were our neighbours, and their stories and faces will always be with me."

The Vinnies CEO Sleepout started in Parramatta in 2006. This is the first year it has been staged in all Australian state and territory capitals. More than 700 people participated last year, raising close to $3 million.

According to census figures, more than 100,000 Australians are homeless, with over 50,000 on the streets every night.