CoStar

Lead Directory Services Engineer - Washington, DC

Job Description

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 and the NASDAQ 100, 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. 

We are looking for an experienced Lead Directory Services Engineer to join our Identity and Access Management team. This individual will work with their team members to enhance the security of our corporate environment by developing processes and implementing technology around user identity and access management and zero-trust methodologies.

Securely connect 5000 employees to all corporate resources and connect 800 technology developers and engineers to resources across AWS, Azure, GCP, and an 8000 VMware IaaS infrastructure, all through a zero trust framework.

Opportunity to work in an advanced security operation that is responsible for securing the data and products behind 35 websites serving 75M global visitors/mo, running on top of multiple private and public clouds.

This position is located in Washington, DC and offers a hybrid schedule of 3 days onsite, 2 days remote.

Responsibilities

• Be a subject matter expert for identity provisioning, security, and governance.
• Analyze, design, and support a highly complex, enterprise level Active Directory and Single Sign On services in a hybrid on-premise and cloud hosted environment.
• Implement, execute, and support critical IAM processes, including overall identity management, access management, provisioning/de-provisioning, user onboarding/offboarding, and access certifications/review.
• Manage and troubleshoot all aspects of Active Directory and Azure EntraID, including federation, infrastructure, and user accounts.
• Create and maintain system documentation for domain technologies, including installation, configuration, and appropriate troubleshooting steps.
• Proactively identify potential threats, exploit attempts and other security events related to Directory Services and IAM. Make recommendations and/or take action to mitigate these issues as appropriate. Actively contribute to and participate in security incident response as needed.
• Work with internal Security teams to support incident response and logging with enterprise SIEM systems such as Azure Sentinel.
• Work with internal Security teams to remediate critical security findings as they relate to identity.
• Work with internal stakeholders to implement appropriate role-based access controls for access within the organization.
• Identify and implement opportunities for technology, automation, and security enhancements for IAM functions.

Basic Qualifications

• Bachelor’s Degree required from an accredited, not for profit university or college. 
• A track record of commitment to prior employers 
• 8+ years total experience in a technical role such as security, network, systems, or software engineering.
• 5+ years total experience directly supporting Active Directory and Azure EntraID in a large, multi-forest, hybrid environment.
• 3+ years of experience engineering IAM solutions in AWS, Azure, or a large scale IdP implementation (Entra ID, Okta, Ping, etc).
• 3+ years of experience work with SIEM and advanced logging/correlation tools.
• 2+ years writing PowerShell or Python scripts from scratch.
• Ability to get to done-done when troubleshooting issues or engineering solutions.

Preferred Qualifications and Skills

• Expert knowledge of the administration of Active Directory and GPOs in a complex, multi-forest environment.
• Expert knowledge of the administration of EntraID and AD Connect in a hybrid-domain environment.
• Expert knowledge of ADFS and PKI in a multi-OS environment.
• Expert knowledge of DNS, DHCP, and DFS in a multi-OS environment.
• Strong knowledge of modern authentication standards, protocols, and frameworks: LDAP, SAML, OAUTH2, OIDC, FIDO2, Kerberos, SCIM, WS-Federation, JWT.
• Strong knowledge of SSO integration for SaaS-based and private applications using Entra AD, Okta, OneLogin or similar products.
• Strong knowledge of LDAP directory architecture and products such as Active Directory, OpenLDAP, and Radiant Logic.
• Knowledge of IAM governance tools such as SailPoint, Saviynt, and Azure Active Directory.
• Understanding of Microsoft Sentinel and querying logs using KQL.
• Understanding of common security concerns within a typical application (password hashing, SSL/TLS, encrypting at rest and in transit, etc.).
• Understanding of common Active Directory security defense tools and methodologies, such as Bloodhound, Mimikatz, Password Spray, rainbow tables, cryptography, etc.
• Understanding of server virtualization technologies, preferably VMware and/or Microsoft technologies.
• Demonstrated experience automating common operational tasks, web service/API integration, and deployment activities in scripting/programming languages (e.g. PowerShell, Python, Perl, etc.).
• Familiarity with PAM tools (CyberArk, SecretServer, BeyondTrust, Hashicorp Vault, etc.) for credential escrow, vaulting, and retrieval.
• Able to investigate identity related security incidents with cross a functional team of security engineers.

What’s in it for You

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, tuition reimbursement, and an inter-office exchange program.

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), with yoga studio, Pelotons, personal training, group exercise classes
• Access to CoStar Group’s Diversity, Equity, & Inclusion Employee Resource Groups
• Complimentary gourmet coffee, tea, hot chocolate, fresh fruit, and other healthy snacks

We welcome all qualified candidates who are currently eligible to work full-time in the United States to apply. However, please note that CoStar Group is not able to provide visa sponsorship for this position.

#LI-Hybrid

#LI-AR

CoStar Group is an Equal Employment Opportunity Employer; we maintain a drug-free workplace and perform pre-employment substance abuse testing