Social enterprise BeyondMe is offering 30 charities the chance to receive 150 hours of volunteering support from skilled professionals and donations of around £2,500 each.
BeyondMe will provide the charities that are selected with professionals willing to share their time and skills with the organisations as well as raising about £2,500 on their behalf.
Charities and community interest companies have until 24 June to apply, with the 12-month partnerships beginning in July.
The chosen organisations will be matched with groups of seven young people from employers such as Allen & Overy, Deloitte, EY, Goldman Sachs, JP Morgan, Lloyds Banking Group, L'Oréal, PwC and the civil service.
The professional teams – who choose their charity partners through an online voting process after hearing live pitches from the charities – will carry out high-level work such as fundraising, marketing and PR, running employability skills workshops and product development for the charities free of charge.
To apply, organisations should be registered as a UK charity or community interest company, have at least two UK-based full-time staff and have a track record of social impact or evidence of having undertaken a successful pilot project.
They must have six months of funding in place for frontline projects and will need to possess public liability insurance for volunteers.
Organisations that are unsuccessful this time will receive another opportunity to apply for support in October.
A spokeswoman for BeyondMe said in a statement: "We have ambitious growth plans for 2016 and beyond to work with more leading employers, launch more teams, and ultimately deliver even greater social value to charities and social enterprises."
Charities interested in applying should visit the BeyondMe website.