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Senior Network Engineer
Posted Sep 9, 2026 · We last checked this listing on Sep 20, 2026
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Likely interview questions for this role
Written from this job description, not a generic list. Each one notes what the interviewer is really checking.
Behavioral
Walk me through a time you designed and rolled out an SD-WAN solution across multiple sites. What was the business problem and how did you approach the design?
whether the candidate has real end-to-end ownership of SD-WAN projects versus just touching pieces of one
Tell me about a network outage you diagnosed under pressure. What steps did you take and how did you communicate status while you worked the problem?
composure and method during high-stakes troubleshooting, plus communication discipline
Give me an example of a network task you automated with Python or Ansible. What did the process look like before, and what changed after?
real automation experience and ability to quantify the value of the work
Tell me about a security measure you implemented on a network that you think actually mattered. What was the threat you were addressing?
whether security work is intentional and risk-driven rather than checkbox compliance
Tell me about a time you had to push back on a design decision from a more senior engineer or manager because you thought it was wrong. What happened?
technical confidence and ability to advocate for sound architecture in a team setting
Technical
Say you have a Cisco ACI fabric and a tenant's application suddenly loses east-west connectivity between endpoint groups. How would you go about isolating the cause?
depth of hands-on ACI troubleshooting knowledge, not just familiarity with the concept
How do you structure access control lists and routing protocol configuration when you're standing up a new router in a segmented network?
practical command of router configuration fundamentals and security-conscious design habits
Describe how you've used Infoblox to manage DNS, DHCP, and IP address space across a large environment. What problems does DDI actually solve for you day to day?
whether they've operated DDI tooling at scale versus reading about it
How would you use Terraform alongside Ansible in a network environment — what would you hand to each tool and why?
understanding of infrastructure-as-code boundaries versus configuration management, not just tool name-dropping
How do you use GitLab CI/CD pipelines in your network change process, and what stops a bad configuration from reaching production?
maturity of change control practices and comfort working in a DevOps-style pipeline
How do you decide what belongs in your network documentation, and how do you keep it from going stale?
whether documentation is treated as a real deliverable or an afterthought
Situational
If you needed to extend on-prem network connectivity into an AWS VPC or Azure Virtual Network, what would you need to plan for before you touch anything?
grasp of hybrid cloud networking tradeoffs and planning discipline
A vendor delivers equipment late or a firmware update breaks something unexpectedly mid-project. How do you handle that with the vendor and with your internal stakeholders?
vendor management skill and ability to keep a project on track when external parties fail
You're asked to migrate a site from legacy WiFi to Cisco Meraki with minimal disruption to end users. How would you plan and sequence that cutover?
practical migration planning and awareness of business impact during change windows
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