Guardsidium’s owner, Hector Vivieca is the lead instructor with a combined 20 years of military and police experience that will benefit every student that trains with the company. Guardsidium is headquartered in Brandywine, Maryland and serves Prince George’s County, Charles County, Washington DC and beyond. Guardsidium exercises a no refunFooterd policy and will reschedule you for the class of your choice.