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# Sr. Microsoft 365 Administrator (L2/L3)

- **Company:** ISoftStone, Inc.
- **Location:** New York, NY, United States
- **Experience:** Expert
- **Salary:** $135,200 - $145,600
- **Contract:** Permanent contract
- **Skills:** Microsoft Windows, Apple Mac Systems, Systems Engineering, User Authentication, Microsoft Online Services, Cloud Computing, Software Design Documents, Domain Name System (DNS), Identity and Access Management, Microsoft Software, OAuth, Windows PowerShell, Openid Connect, Azure Active Directory, Zero Trust Network Access, Security Assertion Markup Language (SAML), Microsoft SharePoint, Security Information and Event Management, Single Sign-On, Software Deployment, Enterprise Software Applications, Firewalls (Computer Science), Microsoft InTune, Azure Security Center, Microsoft Sentinel, CIS Benchmarks
- **Published:** November 2, 2026
- **Apply:** https://www.careerbuilder.com/job-details/sr-microsoft-365-administrator-l2-l3-new-york-ny--a5f57237-5f2b-4119-b866-e41732802aaf

## About the Role

Microsoft Product Family, Systems Administration/Management, Layer 2 Protocols, Mandarin Chinese Language, Microsoft Product Family, Systems Engineering, Technical/Engineering Design, Low-Level Design, Documentation, Enterprise Protection, Fluency in Mandarin is Preferred, * Five to eight+ years of Microsoft 365 administration and engineering experience

 * Proven experience in solution design/architecture for Microsoft 365 environments
 * Strong hands-on expertise in:

o Microsoft 365 core services (Exchange Online, Teams, SharePoint)

o Intune / UEM / EDR

o Azure AD (Entra ID), SSO, Conditional Access

 * Advanced PowerShell scripting skills
 * Solid understanding of:

o Identity protocols (SAML, OAuth, OpenID Connect)

o DNS, networking, and security fundamentals

 * Experience with hybrid environments (on-prem and cloud)
 * Strong architecture thinking with hands-on execution ability
 * Ability to translate requirements into practical technical designs
 * Strong troubleshooting and problem-solving skills
 * Effective communication with cross-functional stakeholders
 * Proactive, automation-driven mindset
 * Ability to design solutions and contribute to architecture decisions, implement and optimize systems end-to-end, and provide advanced L2/L3 operational support

Preferred Qualifications:

 * Microsoft certifications (MS-102, SC-300, MD-102)
 * Experience with Zero Trust architecture design
 * Familiarity with SIEM tools such as Microsoft Sentinel
 * Experience in enterprise or global environments

## Description

We are seeking a highly skilled Senior Microsoft 365 System Administrator (L2/L3) to support the design, implementation, and ongoing operations of enterprise Microsoft 365 environments. This role combines solution architecture, system engineering, and advanced administration, ensuring secure, scalable, and reliable collaboration and endpoint platforms., Solution Design and Architecture

 * Lead solution design and technical architecture for Microsoft 365 and related services
 * Translate business and security requirements into scalable, secure, and supportable solutions
 * Define architecture patterns across:

o Identity & access (SSO, Conditional Access, Zero Trust)

o Endpoint management (Intune / UEM)

o Collaboration & messaging (Exchange, Teams, SharePoint)

 * Produce high-level and low-level design (HLD/LLD) documentation
 * Evaluate new features and technologies, and provide design recommendations and roadmaps
 * Ensure solutions align with enterprise standards for security, compliance, and performance

System Administration (L2/L3 Support)

 * Provide L2/L3 support for Microsoft 365 services, including escalation handling and root cause analysis
 * Administer:

o Exchange Online, Teams, SharePoint Online, OneDrive

o Azure AD / Entra ID

 * Troubleshoot complex issues across identity, messaging, collaboration, and endpoint environments

Endpoint Management and Security

 * Administer Microsoft Intune and UEM platforms
 * Manage device compliance, configuration profiles, and application deployment
 * Operate and optimize EDR solutions such as Microsoft Defender for Endpoint
 * Design and implement endpoint security baselines and compliance policies
 * Support enterprise endpoint strategy across Windows, macOS, and mobile devices

Identity and Access Management

 * Design and implement SSO, MFA, and Conditional Access architectures
 * Integrate enterprise applications using SAML, OAuth, and OpenID Connect
 * Support hybrid identity (on-prem AD + cloud) and identity lifecycle management
 * Contribute to identity governance and Zero Trust initiatives

Automation and Scripting

 * Develop and maintain automation using PowerShell
 * Build reusable scripts and tooling for provisioning, reporting, and compliance
 * Improve operational efficiency through automation and standardization

Network and Infrastructure Integration

 * Troubleshoot and design solutions related to DNS, authentication, and connectivity
 * Work with network teams on secure access (proxy, firewall, conditional access integration)
 * Ensure reliable service integration across cloud and on-prem environments

Security and Compliance

 * Implement Microsoft 365 security controls and policies aligned with best practices
 * Support audit, compliance, and eDiscovery requirements
 * Collaborate with security teams on monitoring, alerting, and incident response