Note: The job is a remote job and is open to candidates in USA. Lumen is a trusted network and connectivity provider supporting secure, high-performance infrastructure for enterprises, governments, and communities. The Threat Researcher will track advanced persistent threat actors, conduct threat hunting, and transform large-scale telemetry into actionable intelligence. The role also focuses on building AI-assisted workflows, automating detection and intelligence production, and communicating strategic threat insights to customers and stakeholders.
Responsibilities
Leverage global datasets (e.g., netflow, malware and passive DNS,) to track malicious cyber actors, their infrastructure, and campaigns. Build repeatable AI-assisted and automation-driven methods to accelerate detection, prioritization, and intelligence production
Use technical knowledge of adversary capabilities, infrastructure, malware, and network behavior to define, develop, and implement techniques for tracking sophisticated adversaries and delivering actionable threat intelligence to Lumen customers
Lead and enhance threat hunting operations by engaging with research, engineering, data science, and customer-facing teams; building strong partnerships; exploring new data sources; and collaborate with team members in AI-assisted workflow generation, automation design, and complex analytic problem solving
Identify malicious activity in large-scale network, endpoint, DNS, routing, and enrichment data, and scale detection through Python-based automation and data pipelines
Establish AI powered analytical workflows to automate and scale detections of adversary activity and tradecraft
Provide actionable analysis and strategic insights into emerging threats, vulnerabilities, adversary infrastructure, and automation-derived findings, translating complex technical information into clear intelligence for executive leadership, customers, and external stakeholders
Skills
Proven experience in threat analysis and in-depth technical security research, with a track record of identifying and tracking nation-state malicious infrastructure activity with an emphasis on network traffic analysis
Fluency in advanced threat hunting methodologies, attacker tactics, techniques, and procedures (TTPs), and the ability to derive actionable threat hunts, detections, and intelligence requirements from complex data sets
Experience with large-scale data analysis platforms with tools such as PySpark
Experience with telemetry collection and analysis, including OSINT, proprietary endpoint and network data, DNS and routing data, TTP-based threat hunting, and/or threat hunt tooling that improves cross-organization visibility and supports public-private or multi-company collaboration
Proven communication and presentation skills, including the ability to clearly and concisely convey complex technical findings, automation-derived insights, and intelligence judgments to technical, executive, customer, and partner audiences
Proficiency in malware reverse engineering and incident response
Software development experience with Docker, distributed data technologies such as Hadoop or Spark, cloud AI services, vector databases, workflow orchestration, and machine learning frameworks such as TensorFlow or PyTorch
Experience with agentic AI or workflow frameworks such as MCP-based architectures
Active TS/SCI
Benefits
Remote position
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.
Company Overview
CenturyLink (NYSE: CTL) is a technology leader delivering hybrid networking, cloud connectivity, and security solutions to customers around the world. It was founded in 1968, and is headquartered in Monroe, Louisiana, USA, with a workforce of 10001+ employees. Its website is https://www.lumen.com.
Company H1B Sponsorship
CenturyLink has a track record of offering H1B sponsorships, with 9 in 2026, 26 in 2025, 15 in 2024, 30 in 2023, 16 in 2022, 12 in 2021. Please note that this does not guarantee sponsorship for this specific role.