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Lumen Technologies

Sr Network Test Engineer

DENVER, CO, United States
Denver, CO, United States
Denver, United States

Apply on careers.lumen.com About employer

Applications open in a new tab.

Job details

Pay: $87,117 - $116,156 in these states: CO Lumen offers a comprehensive package featuring a broad range of Health, Life, Voluntary Lifestyle benefits and other perks that enhance your physical, mental, emotional and financial wellbeing.
Apply by: May 9, 2027
Experience: 4+ years experience in network testing environments
Posting language: English
Posted: Nov 10, 2026

Original job description

Lumen is the trusted network for the AI‑powered world, connecting people, data, and applications through our expansive fiber network and connected ecosystem. We enable secure, high‑performance connectivity across cloud, edge, and AI workloads for enterprises, governments, and communities. At Lumen, you’ll work on infrastructure customers rely on today and build for what’s next, where performance, security, and resilience matter. This is a high accountability environment where bold ideas drive real innovation for our customers, partners, and industry. The work is challenging, expectations are clear, and trust is built into how we operate. If you’re ready to take ownership, deliver meaningful impact, and help shape the future of AI‑ready connectivity, join us today. The Role

The Sr Network Engineer applies advanced engineering and network principles, theories, concepts and technologies to solve unusually complex problems and issues. Interacts and drives vendor requirements, resolution of bug fixes, code upgrades, and vendor development as necessary. Resolves difficult production/interoperability problems by working with cross functional teams and applying advanced engineering and network principles, theories and concepts. Serves as a subject matter expert and may act as a technical project lead or mentor junior employees. Location: This is an onsite position at Lumen's Zuni St lab in Denver, CO

The Main Responsibilities

Interacts with Architecture (IP and Security), Planning, Operations, Lab, Systems (NSD, alarming) to implement equipment and designs necessary to evolve the worldwide Internet backbone.
Ability to research, write requirements to test hardware and software to ensure interoperability and validation of features, functions and behavior.
Expertise in the certification of equipment, MOPs/network configurations.
Layer 2 – knowledge of ethernet switching equipment and switching architectures used on Lumen’s Internet networks.
Expert level experience with protocols used on Lumen’s Internet networks- BGP, IS-IS, MPLS, BFD and LLDP, and their use
Detailed experience in BGP route policy and the redistribution of routes between protocols.
Expert level knowledge and experience with BGP route reflector architecture and configurations across multiple address families.
Expert level troubleshooting knowledge with multiple vendor routing and forwarding architectures to resolve possible production issues or design behavior issues.
Strong knowledge of the UDP and TCP protocols to help design secure and efficient Internet Networks.
Expert level experience with creating Layer 3/Layer 4 filters and ACLs and creating configurations to meet requirements.
Solid experience with QoS traffic classification, remarking and per class queuing. Create QoS configurations to meet Product specifications and to resolve production issues.
Strong knowledge of distributed denial of service equipment and protocols
Designs and configures servers on BOBJ including Dashboard Design, Explorer, Mobile integration of BOBJ, Universe Configuration.
Self-motivated with problem solving capabilities, sense of urgency and accountability

What We Look For in a Candidate

Bachelor’s degree in computer science or a related field or equivalent experience/education
4+ years experience in network testing environments
Excellent documentation/technical writing skills required
Strong troubleshooting skills

Preferred Qualifications:

MS / M Tech / BS / B Tech degree in Computer Science, related technical field preferred, or equivalent work experience
Knowledge of telecommunications, specifically with VoIP protocols such as SIP
Experience in large scale data mining and big data solution implementation
Deployment experience- Visual intelligence and predictive
Universe Design - single and multi-source is required
Demonstrated ability to adapt to new technologies and learn quickly
Industry experience with DevOps
ITIL certifications

Compensation

This information reflects the anticipated base salary range for this position based on current national data. Minimums and maximums may vary based on location. Individual pay is based on skills, experience and other relevant factors.

Location Based Pay Ranges:

$87,117 - $116,156 in these states: CO Lumen offers a comprehensive package featuring a broad range of Health, Life, Voluntary Lifestyle benefits and other perks that enhance your physical, mental, emotional and financial wellbeing. We're able to answer any additional questions you may have about our bonus structure (short-term incentives, long-term incentives and/or sales compensation) as you move through the selection process.

Learn more about Lumen's:

Benefits
Bonus Structure

What to Expect Next

Requisition #: 344393

Life at Lumen Life at Lumen is human and connected, even in a fast moving, AI‑focused organization. We set clear expectations and trust people to meet them. With real support and shared accountability, teams collaborate better, move faster, and deliver meaningful outcomes. Our Lumen 8 behaviors guide how we interact, make decisions, and work together, shaping a culture built to perform and win. To learn more about Life at Lumen and how we live the Lumen 8, please visit: https://jobs.lumen.com/global/en/life-at-lumen

Background Screening If you are selected for a position, there will be a background screen, which may include checks for criminal records and/or motor vehicle reports and/or drug screening, depending on the position requirements. For more information on these checks, please refer to the Post Offer section of our FAQ page. Job-related concerns identified during the background screening may disqualify you from the new position or your current role. Background results will be evaluated on a case-by-case basis. Pursuant to the San Francisco Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.

Equal Employment Opportunities We are committed to providing equal employment opportunities to all persons regardless of race, color, ancestry, citizenship, national origin, religion, veteran status, disability, genetic characteristic or information, age, gender, sexual orientation, gender identity, gender expression, marital status, family status, pregnancy, or other legally protected status (collectively, “protected statuses”). We do not tolerate unlawful discrimination in any employment decisions, including recruiting, hiring, compensation, promotion, benefits, discipline, termination, job assignments or training.

Privacy Notice Lumen is committed to protecting the privacy and security of personal information collected during the recruitment and hiring process. Our Applicant Privacy Notice explains how we collect, use, disclose, and protect applicant information, as well as how individuals may request access to or deletion of their personal data. To review Lumen’s Global Employment Applicant and Talent Community Privacy Notice, please visit: https://jobs.lumen.com/global/en/privacy-notice

Disclaimer The job responsibilities described above indicate the general nature and level of work performed by employees within this classification. It is not intended to include a comprehensive inventory of all duties and responsibilities for this job. Job duties and responsibilities are subject to change based on evolving business needs and conditions. In any materials you submit, you may redact or remove age-identifying information such as age, date of birth, or dates of school attendance or graduation. You will not be penalized for redacting or removing this information. Please be advised that Lumen does not require any form of payment from job applicants during the recruitment process. All legitimate job openings will be posted on our official website or communicated through official company email addresses. If you encounter any job offers that request payment in exchange for employment at Lumen, they are not for employment with us, but may relate to another company with a similar name.

Apply on careers.lumen.com About employer

More about this job

Skills

Research
Test hardware
BGP
Troubleshooting
ACLS
Problem solving
Computer science
Documentation
Technical writing
SIP
Data mining
DevOps
ITIL

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Work requirements

Jobs in the United States