Sr. IT Engineer - Network Security

Location: St. Louis, MO, United States Minor Outlying I
Date Posted: 20-09-2016
The Sr. Network Security Engineer is responsible for building and maintaining a secure web infrastructure.  They serve as technical project lead for the design, development, implementation and operation of web infrastructure systems and projects.
  • Manage network infrastructure systems performance, reliability and availability to service level agreements.  Ensure that hardware and application security and controls meet or exceed web Infrastructure guidelines.
  • Act as an organizational interface with network security vendors that specialize in end-point security, email/gateway security, cloud security and mobile security.
  • Interact with operations and peer groups for problem coordination, escalation, resolution and reporting.  Proactively communicate status on projects, maintenance and network system issues. 
  • Communicate with internal and external business directors and groups to ensure infrastructure systems meet expectations and requirements.  Develop detailed project plans and track progress against those plans. 
  • Promote network security best practices and transfer technical knowledge to department members.   Develop and maintain comprehensive network system’s documentation. 
  • Responsible for rotational on-call responsibility for all Internet Infrastructure related components.  Ability to handle multiple projects and tasks at a fast moving pace. 


  • 5-7 years of strong experience in web security and network design, implementation and operations. 
  • Knowledge of application delivery (load balancing) environments is a must, strong and specific knowledge of F5’s LTM (BigIP) product is a requirement. 
  • TCP/IP based networking (addressing/sub netting, designing, troubleshooting, routing, OSI model, etc).
  • Knowledge of Internet Firewall and DMZ environments (design, setup, troubleshooting, policy design and administration, Check Point experience a plus) 
  • Knowledge of VPN technology (remote access, site to site, IPSEC, etc) 
  • Packet capturing and protocol analysis (TCP, UDP, ICMP, packet dissection, etc) 
  • Knowledge of e-mail and SMTP (mail routing, troubleshooting, design, SPAM filtering and content inspection concepts, email security and policy based logic/decisions, etc. (Proofpoint experience a plus) 
  • Knowledge of DNS & DHCP protocols (managing large multi-tiered DNS & DHCP infrastructure, design, troubleshooting, etc.)
  • Knowledge of Web Proxies (web proxying, mobile code inspection, web security, filtering/authentication, etc.)
  • Security Discipline (network security, secure network and application design, risk assessment, configuration/hardening, etc.)
  • Remote access systems and methodologies (work at home type infrastructure including VPN connectivity, VoIP, etc. from remote locations a plus).
  • DLP (Data Loss Prevention) – Concepts, policy analysis, incident response, policy tuning, etc. (experience with Websense DLP a plus).
The Timberline Group
Phone: 636-209-5537
PO Box 565, Sullivan, Mo 63080
"Delivering quality solutions through quality people"
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