System Administrator - L3

Job Description

Job Description

HRA JOB TITLE : System Administrator

Brooklyn, NY

Long Term Contract

Tasks & Duties

• Directory Services Management
• Administer and maintain Active Directory (AD) infrastructure.
• Monitor and manage AD replication and domain controllers.
• Implement and enforce group policies and access control policies.
• Perform regular security audits and vulnerability assessments.
• Manage user accounts, groups, and organizational units (OUs).
• Conduct regular backups and disaster recovery testing for AD.
• Integrate and manage authentication services, such as LDAP and Kerberos.
• Exchange On-Premises Management
• Monitor and maintain Exchange server health and performance.
• Manage and troubleshoot email delivery and routing issues.
• Perform regular backups and disaster recovery testing.
• Implement and maintain email security measures, including spam filtering and antivirus solutions.
• Manage mailbox databases, including capacity planning and optimization.
• Conduct software updates, patches, and upgrades for Exchange servers.
• Configure and manage email retention policies and compliance archiving.
• Microsoft Entra ID Administration
• Configure and manage Microsoft Entra ID (formerly Azure Active Directory).
• Implement and manage identity and access management (IAM) policies.
• Monitor and secure Entra ID tenant against unauthorized access and threats.
• Configure single sign-on (SSO) and multi-factor authentication (MFA) solutions.
• Integrate on-premises AD with Microsoft Entra ID for hybrid identity solutions.
• Manage application registrations and API permissions.
• Perform regular security reviews and compliance audits for Entra ID.
• Performance Optimization and Reliability
• Develop and maintain security policies and procedures.
• Implement high-availability and failover solutions.
• Monitor and troubleshoot performance issues across the infrastructure.
• Plan and execute system upgrades and migrations.
• Scalability and Futureproofing
• Design and implement scalable solutions to accommodate future growth.
• Stay updated with the latest technologies and industry best practices.
• Provide recommendations for future improvements and upgrades.
• Plan and execute infrastructure modernization projects.
• Security and Compliance
• Implement advanced security measures and monitor for potential threats.
• Ensure compliance with industry standards and regulatory requirements.
• Conduct regular security audits and penetration testing.
• Develop and maintain security policies and procedures.
• Support and Training
• Provide technical support and troubleshooting assistance.
• Develop and maintain documentation for all systems and procedures.
• Train in-house IT staff on best practices and new technologies.
• Offer guidance and support during major incidents and outages.

Required Skills