Senior System Administrator

Job Description:

• Onit, Inc. is seeking a Senior Systems Administrator to manage and optimize a diverse global IT cloud infrastructure.
• The role focuses on Microsoft 365, Entra ID, SSO, Exchange administration, Email Security (Mimecast), and IT governance while contributing to cross-functional initiatives.

Key Responsibilities:

Microsoft 365 & Exchange Administration:

• Manage user accounts, licensing, permissions, and roles across multiple M365 tenants.
• Manage Exchange Online mail flow, retention policies, and security measures (Mimecast).
• Implement security protocols like MFA, Conditional Access, and threat management.
• Migrate and Manage One Drive, SharePoint and MS Teams.
• Ensure compliance with regulations (e.g., GDPR) and manage eDiscovery and audit logs.

Platform Optimization:

• Monitor platform performance and usage, recommend cost-saving optimizations.
• Develop governance policies and stay updated on the Microsoft roadmap.

Backup, Recovery, and Security:

• Configure backup solutions and update disaster recovery plans.
• Utilize Mimecast for filtering, encryption, archiving, and continuity.

IT Infrastructure Support:

• Manage hosting, domain, and Cloudflare.
• Collaborate on AWS infrastructure projects.

Required Skills:

• 8+ years as Global Admin for M365, Entra ID & Exchange administration, including automation and migrations.
• Proficiency in PowerShell for scripting and administration.
• Expertise in email security (Mimecast), protocols (SMTP, POP3, IMAP) & Security Standards (SPF, DKIM, DMARC)
• Experience with Azure AD, IAM, and compliance frameworks (NIST, GDPR, ISO 27001).
• Knowledge of CrowdStrike, Cloudflare, and Zero-Trust principles.

Preferred Certifications:

• MS-102: Microsoft 365 Administrator
• Microsoft 365 Certified : Messaging Administrator Associate
• SC-300: Microsoft Identity and Access Administrator