Senior Security Engineer — Network, SaaS & AI

CoStar Group; Arlington (VA); Hybrid; USD 115,000 - 203,000; Full time

Benefits offered by this job

Healthcare coverage

Life insurance

Mental health resources

401K with matching

Employee stock purchase plan

Paid time off

Tuition reimbursement

On-site fitness center

Job summary

CoStar Group is seeking a Senior Security Engineer to advance enterprise security across network, cloud, SaaS, and AI systems. Role spans NGFW, CASB/SSE tooling, incident response, and governance with strong emphasis on secure design and risk management.

The position is hybrid in the US (Arlington/Richmond, VA) with in-office Mon–Thu and remote on Fridays, requiring clear communication with technical and non-technical stakeholders.

Qualifications

• Bachelor’s degree required from an accredited university.
• 5+ years in information security or security engineering.
• CISSP, SANS/GIAC, CCNA or equivalent certifications.

Responsibilities

• Secure enterprise network changes (on-prem & cloud) and audit configurations.
• Define SaaS security standards; review architecture and controls.
• Develop security for AI-enabled workflows and governance models.

Skills

5+ years experience

Security certifications

AWS networking security

NGFWs / WAFs / load balancers

Scripting / automation

Networking concepts

SaaS security platforms

Communication skills

Technical documentation

AI security risk management

Education

Bachelor’s Degree in Information Security or related field

Tools

Terraform

Azure DevOps

Job description

CoStar Group is seeking a Senior Security Engineer to advance enterprise security across network, cloud, SaaS, and AI systems. Role spans NGFW, CASB/SSE tooling, incident response, and governance with strong emphasis on secure design and risk management.

The position is hybrid in the US (Arlington/Richmond, VA) with in-office Mon–Thu and remote on Fridays, requiring clear communication with technical and non-technical stakeholders.