Cyber Defense Operations Center Senior Analyst

Transunion • Chicago, IL

73d • Hybrid

About The Position

This role is a Senior Analyst member of the TransUnion Global Cyber Defense team, which includes CDOC, Global Information Threat Protection (GITP), Incident Response and Threat Hunting team, and Security Architecture team. As a Senior Analyst in the Cyber Defense Operations Center (CDOC), they will play a critical role in safeguarding TransUnion's global infrastructure. This position focuses on proactive monitoring across on-prem, cloud, and hybrid environments and also contribute to incident response, propose threat detections. You will leverage cutting-edge technologies, automation, and threat intelligence to identify and mitigate sophisticated cyber threats. This is a 24/7 operational team; shifts may include nights and weekends. The role involves collaboration with global security teams, engineering, and business stakeholders. Location: United States - Flexible with hybrid work options. Preferably a candidate from CST or PST time zone

Requirements

• 3+ years of experience in SOC operations, incident response, or cyber defense
• Proficiency with SIEM platforms (Splunk preferred), EDR tools (CrowdStrike, Defender, Tanium), and CASB solutions (Netskope).
• Strong understanding of network protocols (DNS, HTTP/S, SMTP) and packet analysis.
• Hands-on experience with Windows, Linux, and macOS security hardening.
• Deep understanding of MITRE ATT&CK framework, TTPs, and threat actor behaviors.
• Working knowledge of AWS, Azure, or GCP security fundamentals.
• Exposure to SOAR platforms and scripting (Python, PowerShell) for playbook development.
• Flexibility with working hours will be an advantage

Nice To Haves

• Certifications: CompTIA CySA+, GIAC GCIH, Certified Ethical Hacker (CEH), Cisco CyberOps Associate, Certified Cloud Security Professional (CCSP), Splunk Core Certified Power User or equivalent.
• Experience in threat hunting and proactive detection
• Familiarity with zero-trust principles and modern security architectures

Responsibilities

• Perform in-depth analysis of security events, alerts, and incidents across diverse environments.
• Utilize threat intelligence and forensic techniques to identify emerging threats and adversary tactics.
• Develop and enhance SOC processes, playbooks, and automation workflows.
• Collaborate with engineering teams to improve detection capabilities and reduce false positives.
• Support compliance, governance, and audit requirements related to security operations.
• Participate in on-call rotations for escalated incidents and major security events.
• Foster a culture of continuous learning and share knowledge to peers and juniors.

Benefits

• TransUnion provides flexible benefits including flexible time off for exempt associates, paid time off for non-exempt associates, up to 12 paid holidays per year, health benefits (including medical, dental, and vision plan options and health spending accounts), mental health support, disability benefits, up to 12 weeks of paid parental leave, adoption assistance, fertility planning coverage, legal benefits, long-term care insurance, commuter benefits, tuition reimbursement, charity gift matching, employee stock purchase plan, 401(k) retirement savings with employer match, and access to TransUnion's Employee Resource Groups. Spousal, domestic partner, and other eligible dependent coverage is available on select health and welfare plans.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Industry: Administrative and Support Services
• Education Level: No Education Listed
• Number of Employees: 5,001-10,000 employees