Barry Baker had been referred to the Trees for Cities-managed Capital Woodlands training course from the London Borough of Lambeth.
His training in tree surveying, habitat creation and use of forestry products has given him a NPTC qualification and he now go on to look after woodlands as a manager.
Trees for Cities woodland manager Graham Tindal said: "Rather than being a sticking plaster charity, our training on the maintenance of urban green spaces enables individuals to build skills giving them a renewed confidence in professional life."
The award was presented by broadcaster Clive James and Kew head of arboriculture Tony Kirkham at the first annual ‘London Tree and Woodlands awards', launched to celebrate the committed individuals and groups, who work to improve tree and woodland sites in London.
The award ceremony concluded a day-long conference 'Making London's Woodlands Work', which marked the end of the three-year Capital Woodlands project supported the Heritage Lottery Fund (HLF).
The three-year Capital Woodlands project was managed by Trees for Cities working in partnership with the Greater London Authority, Forestry Commission, BTCV, the Peabody Trust and the London Boroughs of Bromley, Croydon, Haringey, Merton and Redbridge.