The Role

The Senior Information Security Engineer within Product and Platform Security is primarily responsible for identifying and ethically exploiting vulnerabilities across enterprise systems, including cloud-native environments, through advanced penetration testing and adversarial emulation. The engineer will assist as applicable to perform Adversarial Cybersecurity Emulation (ACE) exercises designed to emulate real world attacks including those leveraging AI-driven threat vectors, to evaluate and improve Lumen’s defensive capabilities. Additionally, the engineer is responsible for assisting with identifying, designing, proposing, and realizing strategic security initiatives to improve Lumen penetration testing, and remediation capabilities. The engineer must possess practical experience and technical knowledge of cybersecurity threats, vulnerabilities, technologies, intrusion techniques, and exploit methodologies; a strong knowledge of Information Security and Information Technology (IT) systems as well as a reasonable understanding in all disciplines of networking, programming, application development and system administration. The engineer must have strong oral and written communications skills and experience in presenting to a wide variety of audiences; must be able to work independently and contribute effectively to team efforts, as well as collaboratively with others, to foster consulting with internal partners on cybersecurity topics and strategic security initiatives. Location

This is a remote opportunity open to candidates located anywhere in the U.S. The Main Responsibilities

Represent Corporate Security as a Subject Matter Expert (SME) of cybersecurity pertaining to threats, vulnerabilities, intrusion techniques, and exploit methodologies. Identify vulnerabilities on Lumen systems through penetration testing methods for Lumen infrastructures, products, and services encompassing network elements, operating systems, databases, and applications across the corporate enterprise. Provide technical support to incident response and broader security teams by analyzing vulnerabilities, identifying impacted systems, and assisting in the evaluation of risk and remediation strategies. Identify, design, propose, and realize strategic security initiatives to improve Lumen penetration testing, and remediation capabilities through automation development, processes enhancements, and infrastructure expansion. Perform Adversarial Cybersecurity Emulation (ACE) exercises as sanctioned attacks utilizing real threat actor methods to determine the defensive capabilities of Lumen and provide security improvement recommendations. Evaluate and integrate AI/ML tools for threat detection, behavioral analysis, and anomaly detection into Red Team operations. Evolve Red Team capabilities to include threat emulation in cloud-native and hybrid environments (e.g., AWS, Azure, GCP). Collaborate with key stakeholders throughout the business to improve systemic security risks identified through vulnerability exposure assessments, penetration testing, or ACE exercises. Instill a security culture company-wide through vulnerability awareness and remediation mindset. What We Look For in a Candidate

Undergraduate degree in Information Security, Computer Science, Engineering, related field, or equivalent experience. 4+ years of experience in domains relevant to Information Security; or 2+ years with a Bachelor’s degree. Extensive knowledge of the MITRE ATT&CK framework as well as experience with implementation of MITRE ATT&CK techniques. 3+ years of experience performing penetration testing full time or equivalent. Experience in performing or participating in adversarial exercises, also known as red team exercises. 2+ years of programming experience with Python and PowerShell Experience participating in Capture the Flag (CTF) or similar events. Strong technical knowledge of current and emerging cybersecurity threats, vulnerabilities, intrusion techniques, exploit methodologies, and adversarial emulation. Experience with cloud platforms (e.g., AWS, Azure, GCP), including identity, networking, and workload security. Experience leveraging OWASP Top 10, SANS Top 20 Critical Security Controls, and NIST Vulnerability Database within penetration testing engagements. Experience and knowledge of networking, Unix and Windows operating systems. Self-motivated individual who can drive goals independently, collaborate in a team environment and support junior team members. Ability to perform mixed work hours and days to accommodate penetration testing on production systems during scheduled maintenance windows. Applicable professional certification encompassing multiple foundational security domains such as GSEC, GCED, or Security+. Preferred Qualifications

Master’s degree in Information Security, Computer Science, Computer Engineering, or related field. 3+ years of experience performing penetration testing full time in a large enterprise environment encompassing network elements/protocols, operating systems, databases, applications, and cloud services. 2+ years of experience with Terraform 1+ years of experience in performing adversarial exercises, also known as red team exercises. Experience performing security assessments on mobile devices and applications. Experience with developing exploits and associated payloads pertaining to penetration testing. Familiarity with AI/ML concepts and their application in cybersecurity, such as adversarial ML, anomaly detection, or automated threat hunting. Relevant professional certifications in the domain of vulnerability assessments or penetration testing such as GPEN, GWAPT, GMOB, OSCP, and CEPT. Experience producing professional training material, presenting at professional security conferences, or teaching a subject in a formal class setting. Excellent oral and written communication skills to executive management and technical audiences. Experience in large enterprises or carrier data centers and/or networks. 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: $82,969 - $110,625 in these states: AL, AR, AZ, FL, GA, IA, ID, IN, KS, KY, LA, ME, MO, MS, MT, ND, NE, NM, OH, OK, PA, SC, SD, TN, UT, VT, WI, WV, and WY. $87,117 - $116,156 in these states: CO, HI, MI, MN, NC, NH, NV, OR, and RI. $91,266 - $121,688 in these states: AK, CA, CT, DC, DE, IL, MA, MD, NJ, NY, TX, VA, and WA. 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: #LI-Remote Requisition #: 339513 Background Screening Pursuant to the San Francisco Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records. Equal Employment Opportunities