Specialist, IT Security; Identity & Directory Services Administrator

L3

Harris is dedicated to recruiting and developing high‑performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3

Harris provides an inclusive, engaging environment designed to empower employees and promote work‑life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do.

L3

Harris is the Trusted Disruptor in defense tech. With customers’ mission‑critical needs always in mind, our employees deliver end‑to‑end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security.

Specialist, IT Security (Identity & Directory Services Administrator)

37324

On Site – Melbourne, FL

9/80:
Employees work 9 out of every 14 days – totaling 80 hours worked – and have every other Friday off

We are seeking an experienced Active Directory (AD) and Entra  (Azure AD) Administrator to support a large, multi‑domain, multi‑tenant, multi‑national identity environment for a major defense contractor. This role is responsible for supporting hybrid identity environments, including secure authentication, authorization, and compliance across on‑premises and cloud‑based systems. The ideal candidate has recent technical expertise in AD and Entra , strong security awareness, proven troubleshooting skills, and hands‑on experience supporting enterprise‑scale identity solutions.

If you have the necessary skills, join us in our mission to provide innovative and reliable identity solutions.

• Administer, maintain, and troubleshoot Active Directory Domain Services (AD DS), including users, groups, computers, OU structure, GPOs, domain controllers, and associated Microsoft or third‑party applications
• Support Microsoft Entra , identities, and directory integrations
• Support hybrid identity solutions using Entra Connect (formerly AADC) and on‑prem identity solutions
• Support identity lifecycle processes (joiners, movers, leavers)

• Work with Conditional Access, MFA, and identity protection policies
• Monitor and respond to identity‑related security events and alerts
• Understanding of least‑privilege access and zero‑trust principles

• Support secure authentication mechanisms including Kerberos, SAML, OAuth, and modern authentication
• Configure Entra  SaaS, IaaS, and on‑premises applications
• Manage service principals, app registrations, and API permissions

• Diagnose and resolve identity, authentication, and replication issues
• Perform routine maintenance, health checks, and performance tuning
• Support audits, compliance requirements, and security assessments
• Develop and maintain documentation, standards, and operational procedures
• Participate in on‑call rotation and provide after‑hours support as required

• Automate identity management tasks using Power Shell and Entra
• Recommend and implement improvements to security, scalability, and reliability
• Participate in infrastructure projects, migrations, and upgrades

• Support acquisition, divestiture, and integration activities
• Support AD forest/domain migration work and Azure tenant consolidations

Must be able to obtain a security clearance.

• Bachelor’s degree in Information Systems, Computer Sciences, or an equivalent IT‑related degree and a minimum of 4 years of prior relevant experience. Graduate Degree and a minimum of 2 years of prior related experience. In lieu of a degree, minimum of 8 years of prior related experience.
• 3+ years of experience supporting Active Directory, including building & maintaining AD domain controllers, troubleshooting replication and authentication issues, working with group policies, etc.
• 2+ years of Microsoft Entra  (Azure AD) administration experience, including experience in a hybrid environment with responsibility for supporting identity synchronization, MFA, privileged identity management, tenant…