All three events take place at Capel Manor College in Enfield. First one looks at mobile elevating work platforms, from outriggers and trailers to vehicle-mounted platforms.
BTS Training Services will host the event on April 24, headed by Kevin Moore, an NPTC assessor and instructor for the land-based sector-skills council LANTRA.
On the same day, Dr Dealga O'Callahan, a tree-planning manager, insurer Keiron Hart and accountant John Danahay will host a planning update and workshop.
Topics covered will include changes to the planning law, tree-preservation orders and conservation areas.
And on 25 April, Ouch Training Services will hold a training day on first aid tailored for arborists. Fees for the three courses range from £35 to £115.