A tradename used by Siebe Gorman a British engineering company that developed diving gear.
Muggleton's commercial credits include HMS Pinafore (Essgee), Hello Dolly (The Production Company), The Book Club, Master Class (ICA), Annie (GFO/SEL/Macks), the original Steaming (Morley, Davis), Eureka! (Essgee) and Losing Louis (Ensemble Theatre).
Essgee began by financing and producing recording artists and recordings under licence to the Australian record company Festival Records.