Lead Engineer, Cyber Defense Automation

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Team Overview

At TransUnion, we have a welcoming and energetic environment that encourages collaboration and
innovation. We’re consistently exploring new technologies and tools. This environment gives our
people the opportunity to hone current skills and build new capabilities, while discovering their
genius.

This is a hybrid position and involves regular performance of job responsibilities virtually as well as in-person at an assigned TU office location for a minimum of two days a week.

Role Overview And Core Responsibilities

What You'll Do:

• Design, build, and maintain security response automations on our agentic AI SOC platform, and help lead the migration of existing Splunk SOAR playbooks
• Build agentic workflows end to end: prompt and agent design, tool integration,
• guardrails, output evaluation, and human-in-the-loop review for AI-driven triage and response
• Develop and maintain integrations across the security stack (SIEM, EDR, threat intelligence, case management, ITSM) using REST APIs, webhooks, and event-driven patterns
• Build internal tools, services, and APIs, primarily in Python, that extend platform capability and reduce analyst toil
• Administer and improve the case management platform and its workflows
• Partner with detection engineering to operationalize new detections into automated response
• Contribute to shared engineering standards: Git-based workflows, code review, testing, and CI/CD
• Measure what you build: automation throughput, MTTR, false-positive burden, and analyst time saved
• Write clear documentation and runbooks; collaborate effectively across a global, distributed team

Required Knowledge And Experiences

What You'll Bring:

• 5+ years in security engineering, security automation, or software engineering with a strong security focus
• Strong Python in production settings, with solid command of REST
• APIs, JSON, webhooks, and authentication patterns (OAuth, API keys, secrets handling)
• Hands-on experience with SOAR or security automation platforms
• (Splunk SOAR, XSOAR, Tines, Torq, or similar)
• Experience building with modern LLM platforms (Anthropic Claude,
• OpenAI, Amazon Bedrock, or similar): using APIs, SDKs, and tool-use patterns to build tools, integrations, and agents, with practical prompt and agent design and evaluation of model output for reliability and safety
• Software engineering fundamentals: Git, code review, automated testing, CI/CD
• Working knowledge of SOC operations and incident response workflows; familiarity with MITRE ATT&CK
• Strong documentation habits and written communication; effective in a distributed global team

We'd Love to See:

• Experience with agentic AI security platforms, or building autonomous
• or semi-autonomous agent systems in production
• Fine-tuning, systematic evaluation (evals), or red-teaming of LLMs
• Comfort using AI-assisted development tools (Claude Code, Cursor,
• Copilot) as part of a disciplined engineering workflow
• Splunk Enterprise Security exposure (SPL, detection logic) or detec‐
• tion-as-code experience
• Case management or ITSM platform experience (ServiceNow or
• similar)
• Web service development (FastAPI, Flask, or similar); front-end expo‐
• sure a plus
• AWS, Docker/Kubernetes, Terraform; DevOps background
• Experience mentoring engineers or leading technical workstreams

TransUnion Overview:

At TransUnion, we encourage and are committed to creating a real, positive impact and shared sense of purpose within our Workforce for Good, which empowers our people to grow, innovate and contribute to a better future for our communities and customers. We strive to build an environment where our associates are in the driver’s seat of their professional development— while having access to help along the way. We recognize that success comes when our associates thrive both professionally and personally; that’s why we prioritize work/life flexibility and offer resources for our teams across the globe to collaborate and drive excellence.

Be a part of our Workforce for Good – you’ll work with great people, pioneering products and cutting-edge technology.

TransUnion Job Title

Lead Engineer, Cybersecurity