Sr. Network Engineer: Master’s in IT/IS + 1 yr. exp. Design, implement, maintain and troubleshoot LAN/WAN, mainframe networks, workstations, Internet connections, VoIP, VPN, servers, hardware/software and wireless systems; manage firewall and network security; monitor and optimize network performance. 25% travel throughout USA. Send resume to Macrotech Corporation, 2100 N. Hwy 360, Ste. 1002-1003, Grand Prairie, TX 75050. hr@macrotech.net