John Trumble

Frontier Technology LLC provides technology solutions and infrastructure services. The firm offers data center, virtualization, networking, storage, security, mobility, telecom and software solutions. It provides services to health care, financial, legal, education, retail, construction and manufacturing industries. The company was founded by Jeff McKeever in 1976 and is headquartered in Naperville, IL.

Sentinel Technologies, Inc. provides information technology services. Its services include facility management and administration, network management, network security and integration and remote systems monitoring. The company was founded by Dennis Hoelzer in 1982 and is headquartered in Downers Grove, IL.

Nortel Networks, Inc. provides digital network solutions and services. It offers end-to-end broadband, voice over Internet Protocol, multimedia services and applications, and wireless broadband technology solutions. The company is headquartered in Nashville, TN.

All Covered is a nationwide technology services partner that focuses on computing, networking, and application needs of small businesses. Through one of its local offices, clients will receive a customized solution for their IT network which includes computer and network consulting, planning, design, procurement, implementation, maintenance, and management.