It is currently developing a new marketing approach for the charity to communicate the growth of Crisis' work for homeless people in the UK.
Crisis is widely recognised for its work at Christmas, when it provides the homeless with food and shelter, but the charity also wants to raise awareness of year-round services.
These services include Crisis Skylight, a learning and activity centre in London that is soon to open in Newcastle. SmartMove helps individuals access quality rented accommodation and Changing Lives is a UK-wide financial award scheme.
The agency has also been tasked with highlighting the number of single homeless people who need financial help from the charity's individual donors, corporates and the community.
Andy Page, director of fundraising at Crisis, said: "Crisis is entering an exciting period of fundraising growth. To support this we wanted to develop a new integrated approach to our fundraising activity."
Barney Cockerell, joint creative director at WWAV Rapp Collins London, said: "When we first visited Crisis we were taken aback by the sheer breadth of work that the Charity does.
"We are personally inspired by the prospect of changing the way that homeless people are seen and to be given the opportunity to play a part in ensuring they get a second chance is very exciting and very humbling."
WWAV London has wide-ranging charity experience and currently works for Unicef, NSPCC and the Blue Cross.