132 network security jobs at 95 companies in Thornton, CO

1mo
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Sr. Network Security Engineer
San Diego or Irvine or Los Angeles or Centennial or Las Vegas or Edison
$150k-$180k/yr OnsiteFull Time
Axos Financial
Axos FinancialNYSE: AX: Provides digital-first banking and diverse financial services to customers.
7+ YOE7+ years network security engineering experience with ZTNA and microsegmentation, strong networking fundamentals, familiarity with AI/ML agent development, bachelor's degree or equivalent experience, excellent communication skills.
Kindo.ai, n8n, Claude/Anthropic APIs, Zero Trust Network Access (ZTNA), microsegmentation, LLM
2w
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IT Engineer - Network & Security
Naperville or Denver
$120k-$130k/yr HybridFull Time
PTMA Financial Solutions
PTMA Financial Solutions: Provides treasury and investment services to public sector entities.
3+ YOE3+ years in network/security or infrastructure engineering; SASE/firewall and cloud experience; EDR/SIEM/ITSM familiarity; ability to lift 30 lbs; occasional travel and rotating on-call duties.
SASE, Fortinet, Palo Alto, Netskope, Zscaler, EDR, SIEM, ITSM, Windows Server
2mo
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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
Gusto
Gusto: Cloud-based payroll and HR software for small businesses.
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
2mo
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Systems Infrastructure & Network Security Operations Engineer
Spring or Fort Collins
$93k-$144k/yr OnsiteFull Time
HP
HPNYSE: HPQ: Manufacturer of personal computers, printers, and imaging devices.
6+ YOE6+ years networking and systems experience with zero-trust design, IaC and automation (Ansible, Terraform, Python), CI/CD for network assets, vulnerability management, cloud networking, and architecture governance; technical degree or equivalent experience.
Ansible, Python, Terraform, Git, Jenkins, GitLab CI, Nessus, Qualys, VMware vSphere, Proxmox, Linux, Windows, F5, InfoBlox, AWS VPC, Azure VNets, TOGAF, ArchiMate, OSPF, BGP, MPLS, VXLAN
2mo
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Network Engineer
Fort Collins, Colorado, United States
$116k-$131k/yr OnsiteFull Time
Persistent Systems
Persistent Systems: Secure mobile ad-hoc networking solutions for defense and commercial sectors.
3+ YOECCNA or equivalent, CompTIA Security+, 3+ years as a network engineer, cloud networking experience (AWS or Microsoft Azure), proficiency with Wireshark and iPerf, ability to obtain US security clearance, and willingness to travel ~25%.
Wave Relay, Cloud Relay, Ethernet, MACsec, IPsec, VPN, EIGRP, OSPF, PIM, IGMP, Wireshark, iPerf, AWS, Microsoft Azure, UPS, CoTS, CVEs
2w
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Sr. Network Engineer
Thornton, Colorado, United States
$120k-$135k/yr OnsiteFull Time
MYR Group
MYR GroupNASDAQ: MYRG: Specialty contractor providing electrical construction and infrastructure services.
7+ YOE7+ years enterprise network engineering experience (CCNP-level), strong routing/switching, network security, Azure hybrid networking, VMware networking, troubleshooting and on-call participation.
Wireshark, SolarWinds, PRTG, Dynatrace, NetFlow, sFlow, Python, PowerShell, VMware, VMware NSX, ExpressRoute, F5, Azure, Microsoft operating systems
5d
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Network Engineer 4
Centennial, Colorado, United States
$121k-$202k/yr OnsiteFull Time
United Launch Alliance
United Launch Alliance: Aerospace providing space launch services for satellites.
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
3d
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Senior Network Consultant
Denver or Houston or Dallas
$86k-$113k/yr HybridFull Time
Long View Systems
Long View Systems: Provides managed IT services and enterprise cloud solutions.
5+ YOE5+ years IT experience with network architecture design and deployment, networking and security expertise, cloud experience (Azure/AWS/GCP), strong troubleshooting and documentation skills.
Azure, Azure AI services, AWS, GCP, Chat GPT, Cisco IOS, NXOS, Cisco Meraki, Cisco Voice/Call Manager
21h
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Sr. Network Engineer
Redwood City or San Diego or Denver
$100k-$140k/yr HybridFull Time
SB Energy
SB Energy: Develops, builds, and operates utility-scale renewable energy infrastructure.
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
2mo
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Network Engineer
Annapolis Junction or Aurora
$72-$111/hr OnsiteFull Time
EverWatch
EverWatch: Develops software and intelligence systems for government agencies.
8+ YOE8+ years as a Network Engineer; TCP/IP, DNS/DHCP, SNMP, VPN; configure/manage devices; LAN/WAN/cloud; security; monitoring tools; TS/SCI with polygraph; HS diploma or GED.
Cisco hardware, SolarWinds, Wireshark, Nagios, Firewalls, IDS/IPS, VPN, Encryption
2w
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Senior Network Engineer
Denver, Colorado, United States
$104k-$166k/yr OnsiteFull Time
Peraton
Peraton: National security and mission-critical government technology services provider.
8+ YOE8+ years supporting enterprise network infrastructure; DISA STIG and secure federal experience; Cisco networking, routing/switching, VOIP, encryption, and troubleshooting skills; active TS/SCI or Q/SCI clearance.
Cisco, SolarWinds, OSPF, BGP, IPSec, VOIP
2mo
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Secure Network Engineer
Boulder, Colorado, United States
$150k/yr OnsiteFull Time
Entarian
Entarian: Provides mission-critical engineering and technology solutions for government agencies.
7+ YOE7+ years in secure networking, DoD/IC programs, MBSE, and compliance with DISA RMF/STIGs; TS/SCI preferred.
MBSE tools (Cameo, Rhapsody, MagicDraw)
2w
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Network Lead Engineer (IT)
Denver, Colorado, United States
$115k-$183k/yr RemoteFull Time
DaVita
DaVitaNYSE: DVA: Provides kidney dialysis and integrated chronic disease management services.
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
2mo
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Network Engineer (Level 2 OR 3)
Aurora, Colorado, United States
$83k-$125k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Develops and manufactures advanced aerospace, defense, and space systems.
2+ YOEBachelor's in STEM with 2+ years for Level 2 or 5+ years for Level 3; TS/SCI with poly; Security+; travel 30%; Cisco network experience; Linux/Windows; firewall and load balancer knowledge.
Cisco Router, Cisco Switches, Firewalls, Load Balancers, COMSEC, Linux, Windows, Networking
1w
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Sr IT Network Engineer
Englewood, Colorado, United States
$48-$78/hr RemoteFull Time
CommonSpirit Health
CommonSpirit Health: Operates a national non-profit Catholic health system.
7+ YOE7+ years engineering/architecture experience with Cisco networking, active experience designing/implementing enterprise networks, proficiency with network protocols, security, and multi-vendor environments.
Cisco Nexus, Cisco Prime Infrastructure, Cisco DNA Center (DNAC), Cisco ISE, Cisco
3d
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Network WAN/LAN Engineer
Fort Collins, Colorado, United States
$40-$48/hr OnsiteContract
Sentinel Technologies
Sentinel Technologies: Provides managed IT services and comprehensive technology solutions.
2+ YOE2+ years network engineering experience, hands-on Cisco, Microsoft Azure and Azure Fabric, routing/switching/VLANs/VPNs, network security, strong troubleshooting and customer service, valid driver\u0002s license, willing to work on-call, legally authorized to work in the US.
Cisco, Microsoft Azure, Azure Fabric, VMware, Dell
1mo
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Senior Network Engineer
Boulder, Colorado, United States
$96k-$136k/yr HybridFull Time
ANG SIGNAL
ANG SIGNAL: IT and engineering services provider for government and commercial sectors.
8+ YOE8+ years network engineering experience; 3+ years with Cisco ISE, Aruba, and Clearpass; hands-on Cisco routers/switches; Layer 2/3 expertise; firewall and Fortinet experience preferred; strong communication; bachelor's degree desirable; subject to government security investigation.
Cisco ISE, Aruba, Clearpass, Cisco routers and switches, Fortinet
2w
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Sr Network Engineer - CCIE Contract 1
Denver or Fort Collins
$90k-$130k/yr OnsiteFull Time
Advanced Energy
Advanced EnergyNasdaq: AEIS: Provides precision power conversion and control technology solutions.
5+ YOE5+ years enterprise network engineering experience, strong LAN/WAN/routing/switching knowledge, network security and hybrid cloud networking, vendor and contract management, bachelor's degree required.
Cisco
2mo
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Network System Engineer
Golden, Colorado, United States
$115k-$140k/yr HybridFull Time
Colorado 811
Colorado 811: A non-profit notification center for underground utility damage prevention.
8+ YOE8+ years network/system engineering experience, bachelor\u0002s degree required, cloud and on-prem expertise (Azure/AWS/GCP), Active Directory/Intune experience, scripting (PowerShell/Python), API and security knowledge.
Windows, Mac, Linux, Azure, Google, AWS, Microsoft 365, JIRA, MS Teams, SharePoint, OneDrive, Dropbox, Smartsheet, Workato, Python, Power BI, SQL, JSON, XML, WSDL, OpenAPI, Swagger, PowerShell, Postman, SoapUI, Insomnia, Hoppscotch, VMWare, Hyper-V, Azure DevOps, MS Project, Trello, Five9, Intune, Active Directory
2w
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On-Site Field Network Technician
Denver, Colorado, United States
$23-$27/hr FieldFull Time
Pacific Office Automation
Pacific Office Automation: Sells and services office equipment and IT infrastructure.
Hands-on network field experience with network connectivity, security and Wi‑Fi; Windows server and desktop support; knowledge of networking protocols (SMTP, FTP, SMB, TCP/IP); valid driver\u0002s license and ability to travel locally.
Windows Server, Windows Desktop Operating Systems, Mac OS, VOIP, SMTP, FTP, SMB, TCP/IP