ZenSar Technologies is hiring a

L3 Support Engineers

San Diego, United States


  • Design, install, configure, document and maintain internal network infrastructure.
  • Troubleshoot and repair network-related problems collaborating with IT operations team, third parties and key stakeholders.
  • Ensure that network links and equipment are properly monitored and that alerts are addressed in a timely manner.
  • Collaborate with IT and Information Security to establish, monitor and enforce network access policies.
  • Create and satisfy stringent SLAs associated with Internet Connectivity, Wide Area Network, VPN Connectivity, and Wireless Connectivity.
  • Set up, configure, and test Cisco Call Manager, Unity, Call Manager Express, Unity Express, Cisco LAN switches (core, distribution and access), Cisco firewalls, routers and voice gateways, etc.
  • Perform client consultation: plan, design, implement, and support the voice infrastructure
  • Develop and implement the technical architecture and physical design of the network: analyze existing voice and data networks and recommend solutions
  • Create, maintain and improve documents supporting IT network processes and procedures.
  • Plan, test and respond to Business Continuity and Disaster Recovery events.
  • Actively participate in scheduled Off-Hour Operations, Weekend Work and On-Call Rotation Shifts to provide 24 x 7 support.
  • Implementation and Troubleshooting of, Multi-layer switches, ISR/ASR routers and wireless networks
  • Implementation and Troubleshooting of, WAN Optimizers, Load Balancers, firewalls, DNS/DHCP and VPN Gateways
  • Implementation and Troubleshooting of monitoring tools like Solarwinds
  • Maintaining Documentation – Creating and maintaining SOPs/CMDBs/KEDBs/Run Books
  • IT Service Management – Good understanding of ITIL best practices
  • Monitoring Tools - Integration of Network monitoring tools (e.g. Solarwinds ) with ITSM dashboards (preferably ServiceNow)
  • IT Service Management – Good understanding of ITIL best practices and SLAs
  • Identity and Access Management – Implementation and troubleshooting of Cisco ACS, Cisco ISE, BYoD, Network Admission control


  • 8+ years’ experience as an IT Network Engineer.
  • High level of proficiency in the following routing protocols: RIP, OSPF, EIGRP and BGP.
  • Expert level knowledge with Routers, Switches, and Firewalls.
  • Expert level understanding of TCP/IP, including; DNS and DHCP.
  • Hands-on experience with Cisco network equipment.
  • Experience in Cisco PBX and/or Call Center systems engineering experience
  • Experience with router configuration, knowledge of voice mail, unified messaging, ACD and IVR systems
  • Strong performance tuning (QoS) and capacity planning, traffic analyzation experience.
  • Experience with monitoring solutions such as Solarwinds
  • Working Knowledge of wireless technology using Ruckus or equivalent service provider
  • Proven track record identifying and championing appropriate new technologies; ability to quickly adapt changes
  • A self-starter who can prioritize work in a fast-paced and dynamic tech environment.
  • A team player who can collaborate across all departments and with all levels.
  • Must possess good analytical problem solving and troubleshooting skills.
  • Bachelor’s Degree in Computer Science, Information Systems or equivalent experience.

Desired Skills

  • Experience at multinational corporation dealing with network service providers
  • Professional level Cisco Networks Data/Voice certification (e.g. CCNP, CCNA, CCVP, CCDP or CCIE)
  • Ability to design and implement LAN/WAN using MPLS or Metro Ethernet
  • Automation and scripting

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