Susquehanna Radio, 221 E Philadelphia St, York, PA 17403, US

HistoryMark Nardontonia owner and President of ESI has been actively involved providing security in Central Pa. since 1980. Mark is a second generation security professional. Since the early 1960s Mark's father John A. Nardontonia was involved with electronic security working for manufactures until he started his own company JAN Associated in the 70s. When John Retired in 1997 Mark started ESI and continued providing security installation and service to some of the same customers. Marks Experience and Knowledge will soon span 40 years.SpecialtiesSecure your world with * Intrusion and Fire Detection * Card Access * Video Surveillance * Intercom Entry