Microsoft 365 Security & Infrastructure Administrator

Description

Robert Michael Communications, Inc. is seeking an experienced Microsoft 365 Security & Infrastructure Administrator to lead the day-to-day configuration, security, and operational integrity of our Microsoft 365 environment. This is a hands-on role focuses on identity protection, tenant hardening, and enforcing security best practices across Microsoft cloud services.

In this position, you will serve as the internal owner of Microsoft 365 security and platform configuration, working closely with IT leadership as well as external partners, including managed service providers (MSPs) and vendors.

Robert Michael Communications (RMC) is an administrative services organization providing shared support to an independent medical education company and three full-service medical communications agencies.This is a hybrid position requiring regular on-site presence at our corporate office in Voorhees, NJ, supporting the Information Technology Department.

Essential Duties and Responsibilities

Microsoft 365 Identity & Access Management

Administer Microsoft Entra ID (Azure AD), including: 

-Conditional Access policies

-Multi-Factor Authentication (MFA) enforcement

-Role-Based Access Control (RBAC)

-Privileged Identity Management (PIM)

-Guest and B2B access governance

Manage identity lifecycle processes, including provisioning, deprovisioning, and access reviews

Microsoft 365 Security Administration

Configure, manage, and monitor:

-Microsoft Defender for Office 365

-Microsoft Defender for Endpoint (administrative level)

-Secure Score and remediation initiatives

Maintain and optimize:

-Anti-phishing, anti-spam, Safe Links, and Safe Attachments policies

-Security alerting and incident response workflows

Serve as the first-line responder for Microsoft 365 security incidents

Tenant Configuration & Governance

Administer and secure:

-Exchange Online (mail flow, retention, and security)

-SharePoint Online and OneDrive security configurations

-Microsoft Teams administration and security policies

Implement and maintain:

-Data Loss Prevention (DLP) policies

-Retention labels and retention policies

-eDiscovery (Standard) processes

Endpoint & Device Management

Manage device compliance and security using Microsoft Intune

Enforce device encryption, Conditional Access, and compliance policies

Support secure device onboarding and offboarding processes

Operational Security & Compliance Support

Support internal and external audits (e.g., HIPAA, ISO, SOC)

Assist with security questionnaires and vendor risk assessments

Ensure technical enforcement of documented security policies

Maintain security documentation and configuration standards

Automation & Continuous Improvement

Develop and maintain PowerShell scripts to automate Microsoft 365 administration

Identify and implement improvements to security posture and operational efficiency

Stay current with Microsoft security features, best practices, and roadmap updates

Requirements

5+ years of hands-on experience administering Microsoft 365 environments

Strong expertise in:

-Microsoft Entra ID (Azure AD)

-Conditional Access and MFA

-Microsoft Defender security suite

Proven experience securing Exchange Online, SharePoint, OneDrive, and Teams

Working knowledge of Microsoft Intune and endpoint security management

Experience supporting security audits and compliance initiatives

Strong troubleshooting, documentation, and communication skills

Preferred Qualifications

Microsoft certifications (one or more strongly preferred):

MS-102, SC-300, SC-400, SC-200, SC-401, AZ-500, AZ-900

Experience with PowerShell automation

Familiarity with ISO 27001 and Zero Trust security principles

Experience in a co-managed IT or MSP-supported environment

Additional Responsibilities

Train employees on devices, software access (local and remote), and basic network usage

Install and troubleshoot peripherals, accessories, and software

Follow departmental procedures and proactively communicate when deviations are necessary

Collaborate with system administrators and network support teams to maintain and optimize infrastructure

Independently analyze and resolve technical issues

Provide cross-functional support within the IT department as needed

Perform other duties as assigned

Education and Experience

Bachelor’s degree in Computer Science or a related field and at least 2 years of relevant experience;

or 3–5 years of related experience and/or training.

We offer our employees the following benefits:

Medical Insurance

Dental Insurance 

Vision Insurance 

Life and AD&D insurance- 100% paid in full for full-time employees

Short and long-term disability insurance- 100% paid in full for full-time employees

Voluntary insurance plans

401(k) retirement plan with a profit sharing

Employee Assistance Program (EAP)

Reduced summer hours; Memorial Day to Labor Day

Paid time off and paid holidays

Open communication encouraged

Professional work environment encouraging personal development and team growth

Discounted ticket service (shows, sporting events, movies, etc.)