Tees Archaeology: http://www.teesarchaeology.com/
Provider of archaeological services for Stockton on Tees and Hartlepool. Operates throughout the Tees Valley.
Teesside Archaeological Society: http://teesarchsoc.com/
Local archaeological society serving the Tees Valley, North Yorkshire and South Durham. Annual series of lectures and outings, publishes bulletin of local archaeological interest. Occasional opportunities for practical fieldwork.
Roman Roads Research Association ( Yorkshire Roman Roads Project): http://www.romanroads.org/yorkshireproject.html
Regional group with led by Mike Haken researching the roman road infrastructure and associated sites.
Banda Arc Geophysics: http://www.bandaarcgeophysics.co.uk/
Cracking data analysis site run by Dr Steve Kaye on all things Roman military/battlefield, a must for the serious Roman military researcher.