SR INFORMATION SECURITY ENGINEER

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 We are hiring a Security Platform & SecOps Engineer to design, build, automate, operate, and continuously improve the security platforms that power modern Managed Security Services Provider (MSSP) Security Operations Centre services. This is a senior hands-on engineering role for someone who can take end-to-end ownership of platforms across SIEM, XDR, SOAR, security data pipelines, threat intelligence, cloud security, identity protection, exposure management, and SecOps automation. In one sentence: Own and engineer the end-to-end MSSP security platform ecosystem to deliver scalable, automated, resilient, and measurable 24x7 SOC services. The Main Responsibilities Platform Architecture & Engineering Design and implement MSSP-grade security platform architectures for multi-customer SOC service delivery. Engineer unified SecOps capabilities across SIEM, XDR, SOAR, EDR, NDR, cloud security, identity security, threat intelligence, ITSM, vulnerability, and exposure management platforms. Develop reference architectures, integration standards, data flow diagrams, onboarding patterns, and engineering guardrails. SIEM, Security Data Pipelines & Telemetry Build and maintain reliable telemetry ingestion using agents, collectors, syslog, CEF/LEEF, APIs, event hubs, forwarders, cloud connectors, custom connectors, OpenTelemetry where applicable. Develop parsing, normalization, schema mapping, enrichment, routing, filtering, retention, archival, and data quality controls. Prioritize critical security telemetry across endpoint, identity, cloud, SaaS, email, firewall, proxy, VPN, DNS, server, application, and database sources. Monitor ingestion health, data volume, parser quality, delayed or missing data, connector failures, duplication, query performance, and storage/licensing usage. SOAR, Automation & AI-Assisted SecOps Design and implement SOAR playbooks for enrichment, triage, escalation, evidence collection, notification, reporting, and case management. Integrate security platforms using REST APIs, webhooks, scripts, connectors, service principals, certificates, managed identities, and secure secrets handling. Automate repeatable SOC workflows such as phishing triage, suspicious sign-in response, IOC enrichment, endpoint containment support, case creation, and SLA tracking. Apply human-in-the-loop controls for high-impact response actions Detection Engineering Enablement Work with SOC analysts, threat hunters, and detection engineers to deploy, validate, tune, and maintain detection content across SIEM, XDR, EDR, cloud, identity, and network platforms. Support MITRE ATT&CK-aligned detection coverage, telemetry gap analysis, threat-informed defence, and purple-team validation. Enable Detection-as-Code practices, including version control, peer review, testing, deployment, rollback, and reusable detection content libraries. Platform Lifecycle, Patching & Upgrades Own lifecycle management for SOC platforms, endpoint agents, cloud agents, collectors, forwarders, connectors, integrations, certificates, API credentials, and supporting infrastructure. Plan and execute agent patching, collector upgrades, connector updates, integration maintenance, and platform version upgrades across SIEM, XDR, SOAR, EDR, NDR, CNAPP, CSPM, vulnerability, and related security platforms. Perform pre-upgrade assessment, compatibility checks, dependency mapping, change preparation, test planning, rollback planning, maintenance coordination, and stakeholder communication. Validate post-upgrade functionality for log ingestion, alert generation, dashboards, playbooks, APIs, ticketing workflows, RBAC, etc Customer Onboarding & Service Transition Lead technical onboarding for new MSSP customers from discovery and design through integration, testing, acceptance, and SOC handover. Create onboarding plans, data flow diagrams, collector designs, integration checklists, validation test cases, runbooks, reporting requirements, and acceptance criteria. Work with customer IT, network, cloud, endpoint, identity, application, compliance, and vendor teams to enable required telemetry and controlled response workflows. What We Look For in a Candidate 5+ years of cybersecurity engineering, security platform engineering, SOC engineering, security data engineering, or security infrastructure experience. 3+ years of hands-on experience designing, deploying, maintaining, or upgrading SIEM and/or SOAR platforms in an enterprise, MSSP, MDR, SOC, or security consulting environment. Hands-on experience with at least one major SIEM platform such as Microsoft Sentinel, Splunk, Cortex XSIAM, Google SecOps, FortiSIEM, QRadar, or equivalent. Hands-on experience with at least one SOAR or automation platform such as Cortex XSOAR, FortiSOAR, Splunk SOAR, Microsoft Sentinel automation, Azure Logic Apps, Google SecOps SOAR, or equivalent. Experience with agent deployment and patching, collector and forwarder management, connector updates, platform upgrades, change control, rollback planning, and production validation. Strong understanding of security telemetry across cloud, SaaS, identity, endpoint, network, application, database, and infrastructure environments. Working knowledge of APIs, scripting, automation, secrets handling, service principals, certificates, secure integration design, and production support practices. Strong troubleshooting capability across source devices, agents, collectors, network paths, parsers, ingestion pipelines, storage, dashboards, alerts, playbooks, and ticketing integrations. Ability to produce clear architecture diagrams, technical documentation, runbooks, onboarding artefacts, and stakeholder-ready explanations. Preferred Certifications Microsoft SC-200, SC-100, AZ-500, or equivalent Microsoft security certifications. Splunk Admin / Architect, Palo Alto Cortex XSOAR or XSIAM, Fortinet NSE, Google SecOps, or other platform certifications. GIAC certifications such as GCIA, GCIH, GCFA, GDAT, GCTI, or equivalent practitioner certifications. CISSP, CCSP, AWS Security Specialty, or cloud/security architecture certifications. Training or practical experience in MITRE ATT&CK, detection engineering, threat hunting, purple teaming, cloud security, platform engineering, or DevSecOps. Requisition #: 342891 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: 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: 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.