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Sr Network Firewall Engineer Jobs in Colorado (NOW HIRING)

Stefanini Group

Sr Network Engineer - Connectivity

Aurora, CO · On-site

$104K - $143K/yr

Stefanini Group is looking for Senior Network Engineer - Connectivity for a globally recognized ... CCNA certification is preferred and any other networking, server, firewall certificates will be a ...

Stefanini Group

Sr Network Engineer - Connectivity

Aurora, CO · On-site

$104K - $143K/yr

Stefanini Group is looking for Senior Network Engineer - Connectivity for a globally recognized ... CCNA certification is preferred and any other networking, server, firewall certificates will be a ...

Ci

Senior Network Engineer

Denver, CO · On-site

$95K - $140K/yr

Manage firewall policies, VLANs, routing and switching, wireless configurations, VPN connectivity, network monitoring, troubleshooting, * Participate in change management activities to maintain a ...

SAIC

Senior Network Engineer

Colorado Springs, CO · On-site

$80K - $120K/yr

Network Engineer Schedule: Full-Time Shift: Day Job Travel: No Minimum Clearance Required: Secret ... firewalls, remote access systems, and telecom equipment. * Provides expert knowledge for ...

SAIC

Senior Network Engineer

Colorado Springs, CO · On-site

$80K - $120K/yr

Network Engineer Schedule: Full-Time Shift: Day Job Travel: No Minimum Clearance Required: Secret ... firewalls, remote access systems, and telecom equipment. * Provides expert knowledge for ...

SAIC

Senior Network Engineer

Colorado Springs, CO · On-site

$80K - $120K/yr

Description SAIC seeks a highly experienced and energetic Network Engineer to support the US Space ... firewalls, remote access systems, and telecom equipment. * Provides expert knowledge for ...

IC-CAP LLC

Sr. Network Engineer 102-227

Colorado Springs, CO · On-site

$102K - $140K/yr

Senior Network Engineer , under general direction, manages the purchase, installation, and support ... firewall, routers, switches, controllers * Knowledge of application transport and network ...

CoorsTek, Inc.

Sr Network Administrator

Golden, CO · On-site

Job Title Sr Network Administrator The Senior Network Administrator will combine advanced technical ... Maintain deep technical expertise in routing, switching, wireless, firewalls, VPNs, and network ...

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Sr Network Firewall Engineer information

What does a Sr Network Firewall Engineer do?

A Sr Network Firewall Engineer is responsible for designing, implementing, managing, and troubleshooting network firewall systems to protect an organization’s digital assets from unauthorized access and cyber threats. They evaluate network security needs, configure firewall policies, monitor for suspicious activity, and ensure compliance with security standards. Additionally, they may lead projects, provide technical guidance to junior engineers, and collaborate with other IT teams to maintain robust network security.

What are the key skills and qualifications needed to thrive as a Sr Network Firewall Engineer?

A Sr Network Firewall Engineer needs deep expertise in network security, firewall configuration, and troubleshooting, typically supported by a bachelor’s degree in computer science or a related field and relevant certifications like Cisco CCNP Security or Palo Alto Networks PCNSE. Familiarity with firewall platforms (such as Cisco ASA, Palo Alto, or Fortinet), intrusion detection/prevention systems, and network monitoring tools is essential. Strong analytical thinking, attention to detail, and effective communication help engineers address complex security issues and collaborate with IT teams. These skills and qualities are crucial for protecting organizational assets, maintaining uptime, and ensuring regulatory compliance in dynamic network environments.

What are some common challenges faced by Sr Network Firewall Engineers when managing large-scale enterprise networks?

Sr Network Firewall Engineers often encounter challenges such as balancing security requirements with network performance, managing complex firewall rule sets, and ensuring minimal downtime during updates or migrations. They must stay current with evolving threats and technologies, while also collaborating closely with security, operations, and compliance teams to implement policy changes. Successfully navigating these challenges requires strong analytical skills, attention to detail, and effective communication across multidisciplinary teams.

What is the difference between Sr Network Firewall Engineer vs Network Security Engineer?

AspectSr Network Firewall EngineerNetwork Security Engineer
CertificationsCCNP, CISSP, Cisco ASACISSP, CompTIA Security+
Work EnvironmentDesigning, implementing, managing firewalls and security policiesMonitoring, analyzing, and improving overall network security
Industry UsageCommon in enterprise and service provider networksUsed across various industries focusing on security infrastructure

The Sr Network Firewall Engineer primarily focuses on configuring and maintaining firewalls to protect network perimeters, while the Network Security Engineer has a broader role in securing entire network systems. Both roles require similar certifications and often work in enterprise environments, but their core responsibilities differ in scope and focus.

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What job categories do people searching Sr Network Firewall Engineer jobs in Colorado look for?

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Sr Network Firewall Engineer jobs near you
Infographic showing various Sr Network Firewall Engineer job openings in Colorado as of August 2026, with employment types broken down into 1% As Needed, 79% Full Time, 15% Part Time, and 5% Contract. Highlights an 92% Physical, 3% Hybrid, and 5% Remote job distribution.

Senior Network Engineer

Sphinx Defense

Colorado Springs, CO • On-site

$144K - $176K/yr

Full-time

Medical, Dental, Vision, Retirement

Posted 27 days ago

Job description

ABOUT SPHINX
Sphinx builds software to solve complex national security problems in Space. Founded by engineers and technologists with deep experience across commercial and defense technology, we were frustrated by the outdated and insecure technology America's service members are forced to rely on. We're here to do better.
We're focused on building modern, scalable products with an emphasis on using open source technologies. Expect talented, motivated, and interesting colleagues who emphasize collaboration, transparency, and individual responsibility.
ABOUT THE ROLE
Sphinx is hiring a Senior Network Engineer to help design, build, secure, and maintain resilient network infrastructure supporting next-generation national security space systems. This role will support mission-critical systems across classified and unclassified networks, and will require closely collaborating with software, infrastructure, products teams to ensure reliable and secure connectivity for operational systems.
We're looking for someone who enjoys owning complex infrastructure challenges and can bring a strong mix of hands-on networking expertise and systems thinking to the team. You will ensure that the infrastructure underpinning critical national security space missions is performant and secure. This role is designed for someone with deep technical experience supporting enterprise or mission-focused environments, particularly within government, defense, or highly regulated spaces.
What you will be focusing on:
  • Designing, configuring, maintaining, and troubleshooting secure network infrastructure
  • Supporting routers, switches, firewalls, gateways, and other enterprise networking technologies
  • Investigating and resolving network performance, reliability, and connectivity issues across LAN/WAN environments
  • Supporting secure classified network environments and maintaining compliance with government security requirements
  • Performing network monitoring, packet analysis, and root cause troubleshooting using industry-standard tools
  • Collaborating with cloud, infrastructure, and cybersecurity teams to support modernization and scalability efforts
  • Assisting with implementation and maintenance of network security controls and segmentation strategies
  • Supporting documentation, technical analysis, and operational reporting for internal and customer stakeholders
  • Contributing to infrastructure improvements that increase reliability, automation, and operational efficiency
  • Supporting DNS, DHCP, IP management, and other core network services in enterprise environments

You might be a good fit if you:
  • Have 10+ years of experience supporting enterprise or mission-critical network infrastructure
  • Have hands-on experience with network troubleshooting, routing and switching, firewalls, and secure network architectures
  • Are comfortable working within classified or highly secure environments
  • Have experience with Cisco networking technologies and enterprise networking protocols
  • Have experience analyzing network traffic and troubleshooting complex connectivity issues
  • Have experience supporting cloud or hybrid infrastructure environments
  • Can clearly communicate technical issues, risks, and recommendations to both technical and non-technical stakeholders
  • Are highly collaborative, self-motivated, and comfortable operating in fast-paced environments with evolving priorities
  • Hold an active TS/SCI clearance or are eligible to obtain one

Bonus points if you have:
  • Experience supporting multi-cloud or hybrid cloud networking environments
  • Familiarity with infrastructure automation or network scripting tools
  • Experience supporting space, defense, or government mission environments
  • Hold an active DOD 8570 IAT Level II certification or higher (i.e. Security+)

LOCATION
This is a hybrid role based in Colorado Springs, CO, with a combination of onsite and remote work.
COMPENSATION
This role is between $144,000 - $176,000 base salary.
BENEFITS
Compensation includes competitive salary, meaningful equity ownership, profit sharing, employer 401(k) contribution, and 100% employer covered medical, dental, and vision insurance for you and your dependents.
ELIGIBILITY
Must be a US Citizen.
Must be able to obtain and hold a U.S. TS/SCI security clearance.
EEO STATEMENT
At Sphinx Defense, we are devoted to building a team that represents a variety of backgrounds, perspectives, and skills. Sphinx Defense is committed to providing equal employment opportunities to all employees and applicants for employment without regard to race, color, religion, sex, sexual orientation, and gender identity.
CLEARANCE ELIGIBILITY - This position requires eligibility to obtain and maintain a U.S. security clearance. For more information about U.S. Security Clearances: click here.
To conform to U.S. Government export regulations, applicant must be a (i) U.S. citizen or national, (ii) U.S. lawful, permanent resident (aka green card holder), (iii) Refugee under 8 U.S.C. § 1157, or (iv) Asylee under 8 U.S.C. § 1158, or be eligible to obtain the required authorizations from the U.S. Department of State. Learn more about the ITAR here.

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