• Microsoft Exchange

    BOOZ, ALLEN & HAMILTON, INC. (Laurel, MD)
    Microsoft Exchange Administrator The Opportunity: Are you looking for an opportunity to combine your technical skills with big picture thinking to make an ... or engineering + Ability to design, implement, administer, and support client Microsoft email and messaging services + Ability to maintain and implement a… more
    BOOZ, ALLEN & HAMILTON, INC. (01/09/26)
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  • Exchange and Messaging System Engineer

    TekSynap (Washington, DC)
    …+ Bachelor's in Information Technology or Network Administration. + Certifications: + Microsoft Exchange Server / M365 Administrator + Security+ ... messaging environments, ensuring secure and available email operations. + Manage Microsoft Exchange Online and M365 integration. + Oversee email routing, spam… more
    TekSynap (12/03/25)
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  • Senior Enterprise Messaging Administrator

    Dentons US LLP (Washington, DC)
    …and Collaboration platforms. The Senior Messaging Administrator will focus on Exchange Online and Microsoft 365 environments, requiring deep expertise in ... Senior Enterprise Messaging Administrator Chicago, IL, USDallas, TX, USAtlanta, GA, USKansas...provide robust support for Active Directory, EntraID, DNS, and Microsoft Exchange , with a specialized focus on… more
    Dentons US LLP (12/13/25)
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  • Systems Administrator II Generalist Sr…

    V2X (Springfield, VA)
    …for the Senior Systems Administrator II is to extend support to both Microsoft Windows Server and Red Hat Enterprise Linux (RHEL) platforms as time and resources ... Windows Security Administrator (GCWN) certified. + Strongly desired to be Microsoft Certified: Modem Desktop Administrator Associate or Microsoft more
    V2X (11/15/25)
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  • Systems Network Administrator (SNA-2)

    Leidos (Laurel, MD)
    …**Leidos** has a new and exciting opportunity for a **Systems Network Administrator ** in our **National Security Sector's (NSS) Cyber & Analytics Business Area ... difference in National Security!** **Job Summary:** The Systems Network Administrator provides support for implementation, troubleshooting and maintenance of… more
    Leidos (11/18/25)
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  • Systems Administrator

    Koniag Government Services (Washington, DC)
    …+ Manage and maintain enterprise servers and systems infrastructure + Administer Microsoft Exchange , Active Directory, and associated systems + Implement ... Management Solutions,** a Koniag Government Services company, is seeking a Systems Administrator with a Top-Secret clearance with the ability to obtain a SCI… more
    Koniag Government Services (12/30/25)
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  • Network-System Administrator II

    Global Resource Solutions (Washington, DC)
    …Skills: + Thorough knowledge of Microsoft Windows 2008 R2/2012 R2 Server, Microsoft Exchange Server 2003/2010, Microsoft Windows 7/10 operating systems ... detail orientated, and talented individual for the position of Network/System Administrator II. Job Description: Summary: The Network/System Administrator II… more
    Global Resource Solutions (12/19/25)
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  • Secret Cleared System Administrator

    Insight Global (Arlington, VA)
    …Zero Trust, PAM, and MFA. Primary Responsibilities: * Review and modernize Microsoft 365 services ( Exchange Online, Teams, SharePoint Online, OneDrive, Intune) ... Job Description The Infrastructure & Systems Administrator is responsible for maintaining, securing, and optimizing the organization's Microsoft 365 and… more
    Insight Global (12/23/25)
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  • Software Engineer/Systems Administrator

    Cinteot (Springfield, VA)
    …must be able to install, configure, troubleshoot, diagnose, and resolve problems with Microsoft Exchange , Microsoft Windows 2012 Server, and Active Directory ... Software Engineer / Systems Administrator (location: Springfield, VA) The selected individual will...PowerShell. + Utilizes enterprise management software tools such as Microsoft System Management Server and Windows Server Update Services.… more
    Cinteot (11/06/25)
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  • Senior Systems Administrator

    ManTech (Washington, DC)
    **MANTECH** seeks a motivated, career and customer-oriented **Senior Systems Administrator ** to join our team in **Washington** **, DC** . **Responsibilities include ... supporting customer related issues + Proficient working with and supporting Microsoft Office products **Clearance Requirements:** + Must have a current/active TS/SCI… more
    ManTech (12/31/25)
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  • Tier 2 Unified Communications Administrator

    CACI International (Washington, DC)
    Tier 2 Unified Communications Administrator Job Category: Information Technology Time Type: Full time Minimum Clearance Required to Start: TS/SCI with Polygraph ... Instant Messaging (IM), Presence, Audio/Video Streaming with some Public Branch Exchange (PBX) phone support within the enterprise. Responsibilities are based on… more
    CACI International (01/03/26)
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  • M365 Sr. Exchange Engineer

    CACI International (Arlington, VA)
    …and troubleshooting complex incidents. **Responsibilities:** * Provide end-to-end service support for Microsoft 365 and Exchange Online * Participate in service ... experience * 5+ of relevant experience in Architecture and designing solutions in Exchange Online, and Microsoft 365 * Must have strong hands-on experience… more
    CACI International (10/16/25)
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  • Windows System Administrator - active…

    V2X (Mclean, VA)
    …Operations Manager (SCOM) and Access Control Service (ACS) + Experience with Microsoft Exchange , Outlook, and antivirus solutions including Symantec and McAfee ... **Preferred Qualifications:** + Familiarity with LAN, SAN, TCP/IP, and Cisco network configurations + MCSE or MCITP certifications + Experience with VMware 5+ and a VMWare Certified Professional (VCP) credential **Employee benefits include the following:** +… more
    V2X (12/30/25)
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  • Microsoft 365 / Entra Identity Engineer

    Leidos (Washington, DC)
    …+ Prior experience supporting an internationally-based federal agency + SC-300: Microsoft Identity and Access Administrator Associate certification or equivalent ... are seeking a senior-level engineer with deep expertise in Microsoft 365 and Entra to lead the design, implementation,...highly complex M365 services across Entra / Azure AD, Exchange Online, Teams, Intune, and Defender. + 5+ years… more
    Leidos (11/06/25)
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  • Cloud Infrastructure Engineer 2

    Public Consulting Group (Washington, DC)
    …visit www.publicconsultinggroup.com . Own operational stability, security, and performance of Microsoft Exchange Online and SMTP services within Microsoft ... Operation Engineer** **Role Summary** Own operational stability, security, and performance of Microsoft Exchange Online and SMTP services within Microsoft more
    Public Consulting Group (11/20/25)
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  • Cloud Architect - Secret Clearance Required

    NANA Regional Corporation (Washington, DC)
    Microsoft Enterprise Administrator . + At least 2 years of Microsoft Exchange administration experience. + Hands-on experience with Azure administration ... in PowerShell scripting for automation and management tasks. **Desired Certifications:** + Microsoft 365 Certified: Modern Desktop Administrator Associate + … more
    NANA Regional Corporation (11/18/25)
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  • Tier 3 Help Desk Support Engineer

    Koniag Government Services (Washington, DC)
    …Windows SUS Services + Provide intermediate level of troubleshooting for all Microsoft Office Products, Active Directory/ Exchange , and patch management support + ... and self-motivated individual to perform the duties of a Tier 3 System Administrator to support a potential future business opportunity located in Washington, DC.… more
    Koniag Government Services (10/16/25)
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  • Information Technology Customer Support Specialist

    KBR (Bethesda, MD)
    …with supervisor, peer groups, and customers, professionally. All interactions involve exchange or presentation of empathy. + Requires only general supervision and ... of support tools such as, but not limited to: Microsoft Office365 products, CyberArk, Multi-Factor Authentication (Symantec VIP, RSA,...of experience as a local area network (LAN) Systems administrator . + Requires at least 2 years of experience… more
    KBR (12/13/25)
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  • Lead Data Loss Prevention (DLP) Security Engineer

    CoStar Realty Information, Inc. (Arlington, VA)
    …**Responsibilities** + Own the enterprise DLP architecture and roadmap using Microsoft Purview across Exchange Online, SharePoint Online, OneDrive, Teams, ... APIs to extend labeling and DLP workflows. + Certifications: SC‑400 ( Microsoft Information Protection Administrator ), SC‑200 (Security Operations Analyst),… more
    CoStar Realty Information, Inc. (11/04/25)
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  • Senior Endpoint Device Engineer…

    Leidos (Washington, DC)
    …Information Technology, or Systems Engineering. + Professional certifications such as Microsoft Certified: Enterprise Administrator Expert, Microsoft 365 ... support and consultation on the design, plan, execution, and deployment of Exchange Online, OneDrive, SharePoint Online, MS Teams and Windows 11 OS, ensuring… more
    Leidos (12/10/25)
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