Senior Cloud Platform Security Engineer

• Bachelor's Degree required from an accredited, not for profit, in person, university or college (preferably in Computer Science, Cybersecurity or a related field).
• A track record of commitment to prior employers.
• 6+ years of hands-on security engineering experience, with depth in at least one and meaningful exposure to others among the following domains: • Securing cloud-native environments (AWS preferred).
• Kubernetes platform hardening or monitoring.
• CI/CD pipelines, containerized application deployments, and IAC, and software supply chain security.

• Demonstrated track record of taking security initiatives from scoping through production rollout and operational ownership.
• Demonstrated ability to author scripts or IAC from scratch in either Python, PowerShell, Ansible, CloudFormation, Terraform, or similar language.
• Securing AI-powered applications, including threat modeling for LLM-based features, MCP server implementations, or agentic systems.
• Experience working in a software development environment with a mature CI/CD.
• Passion for solving complex challenges, innovating, and engaging in your work.

• A self-starter who can advance the platform security program and follow-through ideas to completion.
• Experience with tools and services like AWS GuardDuty, Security Hub, EKS, OPA/Gatekeeper, Falco, Wiz, Datadog, Prisma Cloud, Orca, Upwind, Snyk, or similar.
• Familiarity with software supply chain security, including SBOM generation, dependency vulnerability management, build provenance, and artifact signing.
• Knowledge of infrastructure operations across databases, network, and system administration.
• Effective use of AI tools as a force multiplier for engineering work, with judgment about when AI accelerates work versus when it creates rework.
• Ability to communicate with different levels of leadership conveying risk and driving urgency for risk remediation.
• Familiarity with zero trust principles and cloud-native access controls (e.g. IAM roles, service meshes).
• Ability to mentor and train team members to prioritize security efforts effectively.
• Hands-on experience implementing security tools into CI/CD pipelines.
• Experience testing serverless cloud deployments.

When you join CoStar Group, you'll experience a collaborative and innovative culture working alongside the best and brightest to empower our people and customers to succeed.

We offer you generous compensation and performance-based incentives. CoStar Group also invests in your professional and academic growth with internal training, and tuition reimbursement.

Our benefits package includes (but is not limited to):

• Comprehensive healthcare coverage: Medical / Vision / Dental / Prescription Drug
• Life, legal, and supplementary insurance
• Virtual and in person mental health counseling services for individuals and family
• Commuter and parking benefits
• 401(K) retirement plan with matching contributions
• Employee stock purchase plan
• Paid time off
• Tuition reimbursement
• On-site fitness center and/or reimbursed fitness center membership costs (location dependent)
• Access to CoStar Group's Employee Resource Groups
• Complimentary gourmet coffee, tea, hot chocolate, fresh fruit, and other healthy snacks