Senior Network Security Engineer

Location: Denver, Colorado

Type: Contract To Hire


Optomi, in partnership with a global leader for data center colocation and cloud hosting services, is seeking a Senior Network Security Engineer for their Denver, CO office.

The Senior Network Security Engineer will have expert level experience with Cisco ASA firewalls, load balancers (F5, Ace/CSS, A10 or NetScaler's) and strong routing/ switching skills with protocols to include OSPF, BGP, EIGRP, HSRP, TCP/ IP and Spanning Tree.


  • CCNP Security or equivalent work experience
  • Expert level skills with Cisco ASA/Pix CLI, ASDM and/or FWSM
  • 2+ years of experience engineering load-balancing solutions with F5, Ace/CSS, Netscaler and/or A10 products.


  • Stay relevant by working with the latest and greatest technology (Nexus 9ks, 7ks, 5ks, 2ks, F5 BigIP, A10, Cisco ASA, etc.)
  • Work with a team of highly skilled Network Engineers in developing highly secure cloud solutions. 
  • Newly renovated office that is filled with all of the perks you would expect in a modern/ sophisticated work environment
  • Company sponsors continued education by reimbursing industry certifications and on-going technology training.


  • Proficient hands-on experience and understanding of fundamental networking concepts and protocols such as: VLAN/PVLAN, STP, HSRP/VRRP, IP subnetting, routing. Increasing understanding of a wider set of protocols and advanced technologies
  • Solid knowledge and experience working with network security components such as firewalls, VPN, load balancers, IPS/IDS
  • Experience configuring, troubleshooting server load balancing mechanisms and algorithms
  • Proficient understanding and experience using configuration management and/or diagnostic tools, monitoring applications and performance analysis tools
  • Experience in an operational role working directly with internal and external customers, trouble ticketing systems, and incident management
  • Experience working with distributed, complex enterprise deployments including: multi-tiered environments, virtualization technologies, operating systems, routing, monitoring, storage connectivity, capacity planning, backups, network security
  • Hands on experience configuring, testing, troubleshooting on platforms like Cisco PIX, ASA, FWSM, ACE appliance/module, Nexus 1000; Juniper Netscreen, F5 LTM/GTM, Citrix Netscalar
  • Knowledge and hands on experience with multi-tenant infrastructure and virtual service technologies such as context-based firewalls and load balancers
  • Experience with DDOS and traffic mitigation techniques
  • Medium exposure to working in a Compliance network environment (PCI, HIPAA, SOX, FedRAMP)
  • Ability to successfully plan, document and perform basic maintenance windows on production network and adhere to change management policies and procedures.
  • Proficient understanding and experience enforcing best practice concepts such as network security, access-lists, IOS vulnerabilities and upgrades, user and role based access control
  • Product familiarity with Cisco IOS, NX-OS, Cisco router and switch products, Cisco ACS, Microsoft Visio, Microsoft Windows Azure Multi-factor, EMC RSA, Cacti


  • 5+ years of professional network engineering experience
  • Knowledge and professional experience working with network security components such as firewalls, VPNs, load balancers, IPS/IDS
  • Solid proficiency with at least two of the following protocols: BGP, OSPF, EIGRP, HSRP, MPLS
  • Advanced skill level with Cisco iOS and/or Nexus OS (NX-OS)
  • Hands on experience configuring, testing, troubleshooting on Cisco routing, switching, and security platforms like Cisco Catalyst 6500/7600, Nexus 1000/7000, PIX, ASA and ACE platforms.
  • CCNP Certification or equivalent experience desired
  • Experience with F5 Load Balancers, Citrix Netscaler or Cisco Ace Load Balancers is a big plus