133 network security engineer jobs at 83 companies in Castle Pines, CO
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Network Security Engineer III
Colorado Springs, Colorado, United States
$96k-$159k/yr OnsiteFull Time
3+ YOEBachelor's degree and 3+ years of enterprise network experience required, with network security, troubleshooting, Agile or DevSecOps experience, TS/SCI clearance or SCI eligibility, and U.S. work authorization.
routers, switches, firewalls, SAFe, DevSecOps, Agile, CISSP, Network+, Security+, CEH
3mo
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Senior Staff Security Engineer - Network Security
Denver or San Francisco or New York City or San Jose
$210k-$270k/yr HybridFull Time
10+ YOE10+ years in security engineering; Cloudflare WAF/DDoS/Zero Trust; Terraform/Crossplane; AWS networking; incident response; AI-native workflows; security certifications.
Cloudflare, Terraform, Crossplane, AWS, CloudFront, WAF, DDoS, Zero Trust, Panther, Wiz, CrowdStrike, Claude Code, MCP-driven tooling, LLM automations
1mo
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Network Engineer
Colorado Springs, Colorado, United States
$80k-$176k/yr OnsiteFull Time
4+ YOE4+ years network engineering experience in Defense environments, BA/BS (or substitutions), hands-on routing/switching/firewall/VPN/load balancer experience, network monitoring and protocols knowledge, patching and security controls, strong troubleshooting skills.
SolarWinds, Splunk, LogicMonitor, Python, Ansible
3w
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Network Engineer 4
Centennial, Colorado, United States
$121k-$202k/yr OnsiteFull Time
6+ YOEDesign, implement, and optimize enterprise and launch network infrastructure; mentor engineers; expertise in routing, switching, security, cloud networking, and automation.
OSPF, BGP, Cisco ACI, Palo Alto, Cisco ASA, Firepower, Python, Ansible, PowerShell, Terraform, Azure, AWS, SolarWinds, NetFlow, Cisco ISE, SD-WAN
2mo
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Lead Engineer, Network Security Platform
Birmingham or Bentonville or Phoenix or Tempe or Boulder or Denver or Hartford or Fort Lauderdale or Jacksonville or Miami or Orlando or Tallahassee or Tampa or Atlanta or Des Moines or Boise or Chicago or Indianapolis or Louisville or Baton Rouge or New Orleans or Shreveport or Baltimore or Detroit or Minneapolis or Kansas City or St. Louis or Jackson or Charlotte or Raleigh or Winston-Salem or Lincoln or Omaha or Montvale or Short Hills or Albuquerque or Albany or Buffalo or Rochester or Cincinnati or Cleveland or Columbus or Oklahoma City or Harrisburg or Philadelphia or Pittsburgh or Providence or Greenville or Knoxville or Memphis or Nashville or Austin or Dallas or Fort Worth or Houston or San Antonio or Salt Lake City or Ashburn or Richmond or Milwaukee or Virginia Beach
OnsiteFull Time
5+ YOERequires 5+ years of network security experience, Palo Alto and Zscaler expertise, GCP security engineering, Terraform or Ansible, and a high school diploma or GED; bachelor's degree preferred.
Zscaler, Google Cloud Platform (GCP), Palo Alto, Azure, Palo Alto firewalls, Strata, VM-Series, Panorama, Prisma Access, Terraform, Ansible, Cloud Armor, Zscaler Internet Access (ZIA), Zscaler Private Access (ZPA)
1mo
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Network Security Engineer
Colorado Springs, Colorado, United States
$102k-$138k/yr OnsiteFull Time
2+ YOEActive Top Secret clearance, bachelor’s degree or equivalent, 2+ years related experience, IAT Level II certification (e.g., Security+, CISSP), firewall/switch/router configuration experience (Juniper/Cisco/Palo Alto), EM/VMware familiarity, strong communication.
TCP/IP, VLANs, UDP Multicast, Juniper, Cisco, Palo Alto, Microsoft PowerPoint, Visio, VMware, ESXi, Python, Ansible, PowerShell, NIST CVE
3d
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Staff Network Engineer
Broomfield, Colorado, United States
$112k-$168k/yr HybridFull Time
8+ YOEBachelor’s degree or equivalent and 8+ years of network engineering experience, including OT/ICS security architecture, NERC CIP, IEC 62443, firewalls, SIEM/IDS, scripting, vendor evaluations, and technical leadership.
PowerTrack, Palo Alto, Moxa, SIEM, Syslog, Synology NAS, DNP3, Modbus, IEC 61850, IEC 60870, OPC UA, WSUS, Inductive Automation Ignition, SQL, InfluxDB, Python, PowerShell
1mo
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Network Security Engineer
Colorado Springs, Colorado, United States
$102k-$138k/yr OnsiteFull Time
2+ YOEActive Top Secret clearance, bachelor’s degree or equivalent, 2+ years related experience, IAT Level II certification, firewall/switch/router configuration experience (Juniper,Cisco,Palo Alto), STIG/NIST knowledge, virtualization and scripting familiarity.
OSI Model, TCP/IP, VLANs, UDP Multicast, Juniper, Cisco, Palo Alto, Microsoft PowerPoint, Microsoft Visio, VMware, ESXi, Python, Ansible, PowerShell, JUNOS
3w
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Sr. Network Engineer
Redwood City or San Diego or Denver
$100k-$140k/yr HybridFull Time
5+ YOEBachelor's degree or equivalent,5+ years network experience (preferably OT energy/data center),Azure networking, Palo Alto/Cisco experience, networking/security certifications, familiarity with NIST/ISA/IEC/NERC frameworks.
Microsoft Azure, Palo Alto Networks, Cisco, Dell Servers, Hyper-V, VMware, Kubernetes, Docker, SIEM, EPMS, BMS, NIST SP 800-82, ISA/IEC 62443, NERC CIP
2w
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Senior Network Engineer
Colorado Springs, Colorado, United States
$144k-$176k/yr HybridFull Time
10+ YOE10+ years supporting enterprise or mission-critical networks, hands-on routing/switching, firewalls, Cisco experience, classified environment experience, TS/SCI eligibility, EM/security best practices, packet analysis, cloud networking.
Cisco, DNS, DHCP
3mo
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Network Engineer
Annapolis Junction or Aurora
$72-$111/hr OnsiteFull Time
8+ YOERequires 8+ years of network engineering experience, network protocols and devices expertise, network security knowledge, high school diploma or GED, and TS/SCI clearance with polygraph.
TCP/IP, HTTP, DNS, DHCP, SNMP, VPN, LAN, WAN, SolarWinds, Wireshark, Nagios, Cisco
3mo
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Principal Network Engineer
Denver, Colorado, United States
$160k-$180k/yr OnsiteFull Time
15+ YOE15+ years network engineering; 5+ years in service provider functions; routing/switching expertise; security tools experience; minimal travel; leads technical actions.
Cisco, Juniper, BGP, OSPF, EIGRP, Cisco ISE, Palo Alto
2w
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Network Engineer 3 (TG)
Annapolis Junction or San Antonio or Aurora or Cary
$169k-$266k/yr OnsiteFull Time
10+ YOETS/SCI with Polygraph required; 10+ years relevant experience (varies by degree); experience designing, configuring, and maintaining LAN/WAN networks and related security technologies.
VPN, GRE, IPSec, VoIP, ISO 9000
3d
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Secured Network Services Lead Engineer
Saint Petersburg or Denver
$100k-$200k/yr HybridFull Time
8+ YOEBachelor's degree in computer science, MIS, or related field; 8–10 years of relevant network or information security experience; strong firewall, IDS/IPS, networking, troubleshooting, and security knowledge.
Windows, UNIX, SQL, Tandem, TCP, DHCP, IDS, IPS, URL filtering, HTTPS, DDoS, LAN, WAN, NAT, Microsoft?
1mo
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Network Engineer - Level 2 or 3
Aurora, Colorado, United States
$83k-$155k/yr OnsiteFull Time
2+ YOEActive Top Secret/SCI with CI or full scope polygraph, CompTIA Security+ (or equivalent), multiple years network engineering experience with switching, routing, firewalls, cabling on CISCO/Juniper, and ability to support enterprise/classified networks.
CISCO, Juniper
1mo
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Network Engineer
Colorado Springs, Colorado, United States
OnsiteFull Time
4+ YOEDesign, implement, secure and troubleshoot network environments; mentor staff; strong knowledge of IP, communication protocols, data/network security; 4+ years experience; DoD 8570 IAT II and relevant certifications required; TS/SCI clearance preferred.
23h
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Senior Network Development Engineer
Denver, Colorado, United States
$155k-$195k/yr HybridFull Time
5+ YOERequires 5+ years building infrastructure, automation, or platform solutions; Linux and networking expertise; network automation development; secure connectivity knowledge; technical leadership; and quarterly travel.
Linux, Git, CI/CD, CompTIA Network+, CompTIA Security+, CCNA, CCNP, CCIE, AWS Advanced Networking, Ansible, Cisco DevNet
1mo
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Network Lead Engineer (IT)
Denver, Colorado, United States
$115k-$183k/yr RemoteFull Time
8+ YOE8+ years enterprise network engineering experience with 2+ years in a senior/lead capacity; expert routing/switching, cloud network integration, security, load balancing, IPAM and monitoring; strong communication skills.
Cisco, HP Synergy, Infoblox, PagerDuty, Micro Focus NNMi, Google GCP, AWS, Azure, Workday, ServiceNow, Illumio, Palo Alto Prisma
4w
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Chief Engineer (Network / Systems Engineering Lead)
Colorado Springs, Colorado, United States
$155k-$200k/yr OnsiteFull Time
10+ YOE5+ MgmtBachelor's degree, 10+ years network/systems engineering with 5+ years lead experience, active Top Secret clearance, US citizenship, senior network certification (CCNP/CCIE) and DoD 8140 IAT II/III or Security+/CySA+, RMF/ATO experience preferred.
DevSecOps, AIOps, Zero Trust, Risk Management Framework (RMF), Authority to Operate (ATO), COMSEC, TEMPEST
2mo
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Voice Network Engineer II
Lone Tree or Sparks or Englewood
$82k-$113k/yr OnsiteFull Time
2+ YOEBachelor's or equivalent experience, 2+ years in networking, experience with CUCM, MS Teams, SIP/SBC, TCP/IP, DNS, DHCP, SD‑WAN; CCNA/CCNP preferred; ability to obtain Secret security clearance; occasional travel and 25 lb lifting.
Cisco Unified Communications Manager (CUCM), MS Teams, Teams Phone, Webex, SIP trunking, Session Border Controllers (SBC), VoIP QoS, RTP/RTCP, TCP/IP, DNS, DHCP, SD‑WAN, Python, Ansible, AI
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