Senior Level Network Engineer (Cisco focus) at Centil – Lafayette, Colorado

***To be considered for this role, you must be a US Citizen with an active US government security clearance. Additionally, you must either live near or be willing to move to the Boulder, CO area.***

About Centil

Centil, a Sabel Systems company, is a mission-focused engineering team supporting some of the highest-priority space defense programs in the U.S. Space Force portfolio, including missile defense and missile warning systems for Space Systems Command. Our work spans DevSecOps, CI/CD product development, and space-domain systems engineering, and our people are embedded directly in the programs they support.

In January 2026, Sabel Systems acquired Centil to expand its Advanced Engineering Services capabilities. For our team, that means access to a broader portfolio of programs, deeper corporate resources, and new career pathways - while preserving the technical ownership and small-team culture that defines how we work. It's an exciting time to join Centil: we're growing, the mission portfolio is expanding, and we're building the team that will define what comes next. If you are interested in learning more about Centil or our team, check out our website at www.centil.io.

About the role

This position is for a Network Engineer in Boulder, CO. You will be working closely with a talented team to assist in the design, configuration, testing, implementation and oversight of the computer networks that support our customers mission critical systems. You will also have the opportunity to grow and sharpen your skills with other talented members of Centil.

Please note: this role is required to be onsite in Boulder, details can be discussed during the interview process.

What you'll do

• Design, implement, and support secure, high performance LAN, WLAN, and WAN networks
• Install, configure, and maintain network devices and infrastructure
• Monitor network performance, availability, and system health
• Troubleshoot and resolve escalated infrastructure and network issues
• Automate routine tasks and assess effectiveness
• Provide technical guidance and mentorship to team members
• Implement and test security controls, including access management and disaster recovery
• Partner with users to deliver effective network solutions
• Optimize network performance, scalability, and capacity
• Maintain clear and accurate technical documentation
• Act as a customer facing technical resource and support additional duties as needed

Required Qualifications

• Active DoD Secret clearance
• 8+ years of network engineering or administration experience
• Expertise in data center network design, including spine leaf architecture
• Experience with zone based firewalls
• CCIE Data Center or CCNP (CCIE strongly preferred)
• Strong knowledge of TCP/IP, BGP, OSPF, and OSI layer troubleshooting
• Experience supporting LAN, WAN, firewalls, DNS, VLANs, IP addressing, and VPNs in on premises, cloud, and hybrid environments (AWS, Azure)
• Solid understanding of network security, authentication (TACACS, RADIUS), and access controls
• Working knowledge of SANs and Fibre Channel environments; Dell or Brocade experience a plus
• Familiarity with network operating systems (Cisco IOS preferred), and network monitoring tools.
• Proficiency with Linux and Windows systems
• Strong troubleshooting, organizational, mentoring, and communication skills
• Ability to work independently with strong attention to detail

Preferred/Bonus Qualifications

• 5+ years of hands on experience with Dell switches, servers, and SAN environments
• Security+ certification
• 5+ years of experience configuring and maintaining NAS and/or SAN systems

Other Company Requirements

In addition to job-specific requirements, Centil believes it is important for all employees to possess the following skills/characteristics:

• Strong communication (written and verbal) and presentation skills. Ability to passionately deliver high-level messaging to various types of audiences--this will eventually include senior leaders. Ability to explain technical concepts clearly to non-technical personnel
• Self-motivated individual who actively and independently seeks out opportunities for learning and development
• Collaborates well; enjoys working as part of a team
• DoD Secret or higher clearance is preferred. All applicants must be US citizens eligible for a US Government security clearance

Expected Salary Range

Depending on experience and skillset, most candidates will earn between $140,000 and $180,000 per year.

Please note that the salary range is a general guideline only. We consider many factors when determining salaries including, but are not limited to, scope and responsibilities of the position, candidate’s work experience, education, training, certifications, key skills, and mission/customer familiarity. We combine these factors with market and business considerations to extend a job offer.

Benefits

Centil offers a comprehensive benefits package including the following:

• Generous PTO for vacation, personal, or sick days
• Ten (10) paid holidays per year: 8 fixed holidays, plus 2 additional Floating Holidays per year (taken at Employee's discretion)
• Flex time and the ability to create your own schedule
• Discretionary bi-annual bonus plan, based on individual and company performance
• 401K retirement plan with immediately vested company contributions, no matching required
• Healthcare coverage plan through an Individual Coverage Health Reimbursement Arrangement (ICHRA)
• Employer-paid Life, Long-Term Disability, and Accidental Death and Dismemberment insurances
• Access to optional, employee-paid Life, Accident, Critical Illness, and Hospital Indemnity insurances
• Access to a Dependent Care Flexible Spending Account (FSA)
• Paid training and conference attendance
• Additional benefits, as needed, for significant life events: parental leave, bereavement leave, jury duty pay, military leave pay
• One-time home office reimbursement
• Phone plan reimbursement
• Employee Assistance Program (EAP) services, supporting emotional health and well-being of employees and their families

Centil is an Equal Opportunity Employer. Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, sexual orientation, gender identity, disability, protected veteran status or any other status protected by applicable law.