• 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, USKansas City, MO, USDallas, TX,...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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  • Cloud System Administrator - TS/SCI w/Poly

    General Dynamics Information Technology (Annapolis Junction, MD)
    …and licensing * Ensuring seamless integration, security, and optimal performance of Microsoft 365 applications such as Exchange Online, SharePoint, Teams, and ... of related experience **US Citizenship Required:** Yes **Job Description:** Cloud System Administrator Own the opportunity as a Cloud System Administrator and… more
    General Dynamics Information Technology (01/07/26)
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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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  • System Administrator (Level 4)

    Kaizen Approach, Inc (Annapolis Junction, MD)
    Kaizen Approach is currently seeking a Systems Administrator to provide implementation, troubleshooting, and maintenance support for complex Information Technology ... of twenty (20) years of experience as a System Administrator (SA) on programs and contracts of similar scope,...III certification, a Computing Environment (CE) certification such as Microsoft OS or CentOS/Red Hat OS, and an ITIL… more
    Kaizen Approach, Inc (11/11/25)
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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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  • Windows Systems Administrator

    ManTech (Chantilly, VA)
    …Operations Manager (SCOM) and Access Control Service (ACS) + Experience with Microsoft Exchange , Outlook, and antivirus solutions including Symantec and McAfee ... **MANTECH** seeks a skilled and motivated **Windows Systems Administrator ** to join our team of top Information Technology and Analytic professionals in **Chantilly,… more
    ManTech (12/03/25)
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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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  • Senior Contracts Administrator

    ANSER (Chantilly, VA)
    …of our service. Position Summary ANSER is seeking a Senior Contract Administrator to provide comprehensive acquisition and contract management support to the ... resolution. + Maintain contract files and records in the NRO's Electronic Procurement Exchange (EPX) Studio and other approved systems. + Assist in managing contract… more
    ANSER (01/06/26)
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  • Help Desk System Administrator

    ICF (Reston, VA)
    …technologies as assigned. + Provides technical administrative support using Active Directory, Exchange and Azure. + Participates in special projects as required. + ... + 3+ years of experience using a formal trouble ticket system such as Microsoft System Center Service Manager, Remedy, or ServiceNow. + 3+ years of professional… more
    ICF (01/05/26)
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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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  • Infrastructure Operations Analyst

    ASM Research, An Accenture Federal Services Company (Germantown, MD)
    …remain secure, reliable, and aligned with organizational requirements. + Administer Microsoft 365 services, including Exchange Online, Teams (with voice), ... in M365 administration or enterprise messaging support. **Preferred Certifications** + Microsoft 365 Certified: Messaging Administrator Associate + Microsoft more
    ASM Research, An Accenture Federal Services Company (11/13/25)
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  • M365 Engineer

    Leidos (Rockville, MD)
    …technologies, including cloud services. + Advanced experience with: + Entra ID (Azure AD) + Exchange Online + Microsoft Intune + Microsoft Purview + M365 ... including but not limited to: Entra ID (Azure AD), Exchange Online, Intune, Teams, Power Platform, Purview. + Implement...Microsoft certifications, such as: + Identity and Access Administrator (SC-300) + Endpoint Administrator (MD-102) +… more
    Leidos (12/06/25)
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