The collections have been part of the company's calendar for the last four years, with staff and contractors raising funds through dress down Fridays.
It was through hearing about the work that CLIC Sargent Social Workers do locally that inspired Russells Construction estimator, Aidan Bannon to call on his colleagues to support the charity.
Family friend and one time service team member Judy Stirton recommended CLIC Sargent and highlighted the work carried out by the service teams at both The Christie and Royal Manchester Children's Hospital.
Aidan said: "When I found out about the incredible work that CLIC Sargent does in Manchester, I was really moved by how important the job they do is, so suggested we start the collections.
"It's been a real success as everyone enjoys the dress down Fridays and gets involved, people have also started bringing in cakes and making a real event of it. It's also helped raise awareness of the work CLIC Sargent is doing, and the huge need to support children across the North West.
"We are happy to continue with the collections and hopefully raise even more money next time for CLIC Sargent."
CLIC Sargent Fundraising Manager Maria Healy said: "It is clear that this event has become a part of the Russells Construction calendar and the totals so far are fantastic.
"I'd like to thank everyone for their donations and support, without local companies like Russells Construction, we wouldn't be able to provide assistance for children and families in the Manchester area. We really appreciate everything that our corporate fundraisers do to help would love to welcome other local businesses on board."