Concentric Technologies Ltd. Share: Computer sales, service, supplies, etc. Concentric Technologies Ltd. Visit Website Request Info P.O. Box 419 Marietta, OH 45750 (740) 376-0353 (740) 376-0374 (fax) Visit Concentric Technologies, Ltd. Hours: Monday through Friday, 8:30am to 5:30pm. On-site services by appointment. About Map About Providing information technology services, products, and consulting to Small and Mediium-Sized Businesses (SMB) in the Mid-Ohio Valley since 1998. Directions IT services are provided at your location. What's Nearby? Distance: 5 10 15 20 25 50 mi.