Demo

Microsoft 365 Security Administrator

System One
Reston, VA Other
POSTED ON 10/30/2026
AVAILABLE BEFORE 1/26/2027

For immediate consideration, please connect with me on LinkedIn at https://www.linkedin.com/in/dpotapenko and then email your resume, current location, availability, and compensation expectations directly to denis.potapenko@systemone.com - make sure to include the exact job title and job location in your email message.


We are seeking a Microsoft Systems Administrator ( Microsoft 365 Security Administrator ) to support, maintain, and secure Microsoft 365 environments. This role will administer Microsoft O365 and email security services, manage user and device access, endpoint management, and maintain security controls across the organization.

The ideal candidate will have strong experience with Microsoft 365 administration, Microsoft security technologies, identity and endpoint management.


Responsibilities :

- Configure and maintain Conditional Access Policies, multifactor authentication, and access controls.

- Administer Microsoft Intune for endpoint management, device compliance, application deployment, and updates.

- Monitor and manage Microsoft Defender security alerts and respond to security-related incidents.

- Support Microsoft Purview policies, including data protection, retention, and compliance requirements.

- Manage email security, respond to threats, and remediate vulnerabilities.

- Manage Windows endpoints and assist with Windows Server administration.

- Perform system monitoring, patch management, and vulnerability remediation.

- Maintain technical documentation and support IT projects and initiatives.

- Work with internal teams and vendors to ensure reliable and secure technology services.


Required Qualifications :

- Experience administering Microsoft 365 environments.

- Hands-on experience with: Microsoft Intune, Microsoft Defender, Microsoft Purview, Conditional Access Policies, Entra ID (Azure AD), Exchange Online and email security

- Experience managing Windows desktop environments and Microsoft cloud services.

- Knowledge of identity and access management, endpoint security, and Microsoft security best practices.

- Experience with Mimecast, Azure, or Windows Server administration.


- Experience supporting public sector, government, or regulated environments and knowledge of NIST, or other compliance frameworks.

- Microsoft certifications such as Microsoft 365 Administrator, Endpoint Administrator, Identity and Access Administrator, Security Operations Analyst or Azure Administrator


Why Join Us :


- Join a growing IT team supporting modern Microsoft technologies in an environment focused on security, operational excellence, and continuous improvement.



For immediate consideration, please connect with me on LinkedIn at https://www.linkedin.com/in/dpotapenko and then email your resume, current location, availability, and compensation expectations directly to denis.potapenko@systemone.com - make sure to include the exact job title and job location in your email message.


.

#LI-DP1

#M1

.



Ref: #404-IT Pittsburgh

Hourly Wage Estimation for Microsoft 365 Security Administrator in Reston, VA
$42.00 to $53.00
If your compensation planning software is too rigid to deploy winning incentive strategies, it’s time to find an adaptable solution. Compensation Planning
Enhance your organization's compensation strategy with salary data sets that HR and team managers can use to pay your staff right. Surveys & Data Sets

What is the career path for a Microsoft 365 Security Administrator?

Sign up to receive alerts about other jobs on the Microsoft 365 Security Administrator career path by checking the boxes next to the positions that interest you.
Income Estimation: 
$83,502 - $107,152
Income Estimation: 
$104,896 - $133,785
Income Estimation: 
$123,198 - $153,566
Income Estimation: 
$83,502 - $107,152
Income Estimation: 
$104,896 - $133,785
Income Estimation: 
$123,198 - $153,566
Employees: Get a Salary Increase
View Core, Job Family, and Industry Job Skills and Competency Data for more than 15,000 Job Titles Skills Library

Job openings at System One

  • System One Albuquerque, NM
  • Job Title: Sr. Operations Research Analyst Location: Kirtland AFB, New Mexico Type: Contract To Hire Compensation: $120,000 - $130,000 Work Model: Onsite H... more
  • 4 Days Ago

  • System One Town & Country, FL
  • Sr Strategic Sourcing & Procurement Associate Work Model: Remote Work Location Requirement: Candidates must be based in DMV / WV (DC, MD, VA, WV) Type: Con... more
  • 4 Days Ago

  • System One Denver, CO
  • Job Title: Principal Product Technology Lead – Application Software Location: Lakewood, CO Type: Direct Hire Work Model: Onsite – onsite Overview System On... more
  • 4 Days Ago

  • System One Merrifield, VA
  • Title: Social Engineering Analyst Location: Vienna, VA (Hybrid, onsite 3 days a week) Pay Rate: Open to W2 options Position Type: Contract We are seeking a... more
  • 4 Days Ago


Not the job you're looking for? Here are some other Microsoft 365 Security Administrator jobs in the Reston, VA area that may be a better fit.

  • Microsoft Washington, DC
  • Project Manager (Contract) Please note that this is a contract role providing services to Microsoft through external staffing partners of Allegis Global So... more
  • 20 Days Ago

  • Security SBU Chantilly, VA
  • Overview Are you passionate about security and ready to make a meaningful impact? Chenega is seeking a detail-oriented and skilled Personnel Security Admin... more
  • 11 Days Ago

AI Assistant is available now!

Feel free to start your new journey!