Senior Identity Security Engineer (Arlington, VA or San Diego, CA)
Hardens identity controls for 8,000 employees using zero trust and FIDO2 passkeys, assessing risks and mitigating adversary-in-the-middle attacks across CoStar’s real-estate tech stack.
- Compensation
- $133K–$203K / yr
- Location
- US-VA Arlington
- Work setup
- Remote
- Seniority
- Senior
- Employment
- Full time
- Experience
- 4+ years
- Category
- Security
- Posted
Skills
Must have
- Bachelor’s degree from an accredited university
- 4+ years of hands-on security engineering experience
- Hands-on experience administering IDPs (Okta, PingID, Microsoft Entra ID, Active Directory)
- Knowledge of authentication/authorization protocols (SAML, OAuth, OIDC, Kerberos)
- Understanding of PKI, FIDO2 framework, passkeys, Windows Hello for Business, Platform SSO
- Experience analyzing SIEM logs and creating dashboards
- Ability to read and author basic scripts (Python, PowerShell, Bash)
- Understanding of AitM attacks, Evilgnx, and mitigation via identity security hygiene
Nice to have
- Experience with Microsoft Intune, Jamf, JumpCloud, or other MDM platforms
- Experience with identity security testing tools (Bloodhound, AzureHound, SharpHound, Responder)
- Record of automating operational tasks
- Familiarity with CI/CD infrastructure
- Experience configuring risk-based conditional access policies
- Experience with workload identity governance
- Strong written and verbal communications skills
- Experience with AI/ML-assisted security tooling or LLM-based agents
Full description
Senior Identity Security Engineer (Arlington, VA or San Diego, CA)<br>
Job Description
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Overview
CoStar Group (NASDAQ: CSGP) is a leading global provider of commercial and residential real estate information, analytics, and online marketplaces. Included in the S&P 500 Index, CoStar Group is on a mission to digitize the world’s real estate, empowering all people to discover properties, insights and connections that improve their businesses and lives.
We have been living and breathing the world of real estate information and online marketplaces for over 35 years, giving us the perspective to create truly unique and valuable offerings to our customers. We’ve continually refined, transformed and perfected our approach to our business, creating a language that has become standard in our industry, for our customers, and even our competitors. We continue that effort today and are always working to improve and drive innovation. This is how we deliver for our customers, our employees, and investors. By equipping the brightest minds with the best resources available, we provide an invaluable edge in real estate.
In this role, you'll harden controls to empower 8000 employees to seamlessly and securely connect to company resources through a zero trust, FIDO2 compliant framework. You will assess, identify and mitigate risks across a large technical infrastructure and corporate environment. This position will work with Security, Systems, DevOps, Network, and Development teams to drive and shape the way our employees and engineers access our systems. The candidate must have hands-on experience implementing and operating modern IAM tools. Ideal candidates will have a thorough understanding of adversary in the middle attacks, social engineering attacks, and offensive privilege escalation techniques, and have experience implementing or operating controls to prevent such attacks.
This position can be located in either Arlington, VA or San Diego, CA and is in office Monday through Thursday and work from home on Friday.
Responsibilities
- Design, implement, and continuously improve identity security controls across various platforms
- Develop and maintain conditional access policies that enforce appropriate authentication strength, device compliance, etc including for privileged roles, sensitive applications, and workload identities
- Analyze logs to scope and guide rollouts of new security initiatives
- Support an org-wide, multi-platform phish-resistant authentication rollout
- Engineer controls around AI and workload identities (service principals, managed identities, OAuth app registrations)
- Research, prototype, and operationalize AI-assisted tooling and agentic workflows to improve team efficiency, including automating repetitive analysis and building internal tools that surface identity risk