33 Engineer Regiment (EOD) was born out of the Royal Engineer Bomb Disposal companies, formed during the Second World War to deal with the mounting problem of German unexploded bombs. 

After the war these clearance companies were disbanded and responsibility for UK EOD passed to the Territorial Army (TA), who still maintain 101 (City of London) Royal Engineer Regiment (EOD) (V). 

Formed in 1973, 33 Engineer Regiment (EOD) took over responsibility for UK EOD and is now the specialist Explosive Ordnance Disposal and specialist Advanced Search Regiment for the Corps of Royal Engineers. As such the Regiment is heavily committed to enduring operations in Afghanistan, and to a lesser extent the Falkland Islands.

The Regiment also maintains a significant commitment to UK Military Aid to the Civil Power (UK MACP) and has the responsibility for Explosive Ordnance Clearance (EOC) both in the UK and overseas via the EOC Group.

Not surprisingly the Regiment is the largest in the Corps. The Regiment is comprised of the following Sub-units:

• 22 Headquarters and Support squadron (EOD), (encompassing the EOC Group).
• Four Deployable Squadrons of:
  
  • 17 Field Squadron (EOD)
  • 21 Field Squadron (EOD)
  • 49 Field Squadron (EOD)
  • 58 Field Squadron (EOD)
  • 61 Field Squadron (EOD)

The Regiment is predominantly based at Carver Barracks, Wimbish, in Essex, with its newest sub-unit 61 Field Squadron (EOD) located at Rock Barracks, Woodbridge.