Sign up to access all features of our service.
  • Job search
  • Favorites
  • Create a CV
    New
  • Salaries
  • Subscriptions

Senior Microsoft 365 Administrator

Kaav Inc.

Job Title: Senior Microsoft 365 Administrator

Location: Herndon, VA (Hybrid - 3 days onsite)

Duration: Long Term Contract)

Work Authorization: US Citizens only (Clearable)

Interview: Final Onsite


Job Overview


We are seeking a Senior Microsoft 365 Administrator to serve as the technical lead and subject matter expert for managing, optimizing, and modernizing the Microsoft 365 environment. The ideal candidate will have deep enterprise-level expertise, proven experience driving large-scale M365 initiatives, and a strong background in collaboration, security, and compliance. This forward-thinking role will directly support modernization projects, tenant optimization, and end-user adoption while ensuring secure and scalable cloud collaboration solutions.

Key Responsibilities

  • Lead and drive Microsoft 365 upgrades, migrations, and modernization initiatives .
  • Architect, configure, and maintain Exchange Online, SharePoint Online, Teams, OneDrive, and M365 Admin Center .
  • Implement best practices for identity, access management, security, and compliance including Conditional Access, Sensitivity Labels, DLP, and Defender for O365.
  • Manage tenant-level configurations , hybrid integrations, and licensing strategies.
  • Proactively monitor system health, usage metrics, and compliance dashboards using PowerShell, Graph API, and Microsoft Security & Compliance Center.
  • Develop and enforce governance standards, documentation, and disaster recovery procedures .
  • Collaborate cross-functionally with IT, Security, and business stakeholders to deliver strategic initiatives.
  • Mentor junior team members and act as technical escalation point for complex issues.
  • Evaluate emerging Microsoft 365 technologies and recommend adoption strategies.
  • Provide end-user training and guidance to drive adoption and maximize business value.
Required Qualifications

  • Bachelor's degree in Computer Science, MIS, or related field (or equivalent professional experience).
  • 7+ years of hands-on administration/engineering experience with Microsoft 365 in enterprise environments.
  • Proven success in M365 implementations, upgrades, and enterprise-level projects .
  • Strong expertise in Exchange Online, SharePoint, Teams, OneDrive, and Azure AD .
  • Advanced experience with the Power Platform (Power BI, Power Apps, Power Automate) .
  • Strong PowerShell scripting skills and Graph API experience.
  • Expertise in security and compliance configurations (Defender for O365, Conditional Access, DLP, Sensitivity Labels).
  • Knowledge of hybrid Active Directory and legacy system integrations.
  • Microsoft Certifications (MS-100, MS-101, SC-300, or equivalent).
  • Excellent communication, documentation, and stakeholder management skills.
Preferred Qualifications

  • SharePoint 2013+ administration and customization.
  • Security auditing, tenant hardening, and compliance configuration.
  • Experience with Defender for O365 and Microsoft Security & Compliance Center.
  • Knowledge of networking fundamentals, HTML, JavaScript, and SQL Server .
Certifications (Preferred but not mandatory)

  • Microsoft 365 Certified: Enterprise Administrator Expert (MS-100/102)
  • Microsoft 365 Certified: Mobility and Security (MS-101/102)
  • Microsoft Certified: Identity and Access Administrator Associate (SC-300)
  • Microsoft Certified: Cybersecurity Architect Expert (SC-100)
  • Microsoft Certified: Security Operations Analyst Associate (SC-200)
Vacancy posted 4 days ago
Similar jobs that could be interesting for youBased on the Senior Microsoft 365 Administrator in Reston, VA vacancy
  •  ...available. Subscribe to our RSS feeds to receive instant updates as new positions become available. Orbis is looking for a Senior Microsoft 365 Administrator who has grown up in the Microsoft ecosystem, uses Claude as a core part of how they work, and shows up every day with... 
    Senior
    Microsoft
    Work at office
    Local area
    Remote work

    Orbis-Operation

    McLean, VA
    2 days ago
  • Orbis Ops in McLean, Virginia, is seeking a Senior Microsoft 365 Administrator to manage their M365 environment and provide outstanding support for employee technology needs. The successful candidate will have over 6 years of hands-on experience with Microsoft 365 and... 
    Senior
    Microsoft

    Orbis Ops

    Mc Lean, VA
    5 days ago
  • Orbis-Operation is seeking a Senior Microsoft 365 Administrator based in McLean, Virginia. The ideal candidate will have over six years of deep experience in Microsoft 365 administration, managing all aspects of the tenant, including users, security, and compliance policies... 
    Senior
    Microsoft

    Orbis-Operation

    Mc Lean, VA
    3 days ago
  • $121k - $182k

     ...conflicts, and communicates effectively with senior leadership and stakeholders....  ...unique needs of our client as a Senior Microsoft 365 Engineer. Project Summary AIS is seeking...  ...Responsibilities Lead implementation, administration, and advanced support for... 
    Senior
    Microsoft

    Applied Information Sciences

    Reston, VA
    8 hours ago
  • $81.35k - $85k

     ...advance the mission and optimize our business strategy as a Senior Subcontracts Administrator at GDIT. Here, you’ll support solving some of our...  ...large procurement activities Required Technical Skills: Microsoft Office Suite Required Skills and Abilities: Effective administrative... 
    Senior
    Microsoft
    Contract work
    Temporary work
    For subcontractor
    Work at office
    Flexible hours
    3 days per week

    General Dynamics Information Technology

    Herndon, VA
    2 days ago
  •  ...Guidehouse-Inc. is seeking a Senior Software Engineer in McLean, Virginia. The ideal candidate will have hands-on experience with Microsoft Power Apps and Dynamics 365, focusing on developing custom solutions while supporting and enhancing the MPP application. This position... 
    Senior
    Microsoft

    Guidehouse

    McLean, VA
    8 hours ago
  • Gross, Mendelsohn & Associates, P.A. is seeking a Senior Microsoft Dynamics 365 Business Central Implementation Consultant in Fairfax, Virginia. This senior-level role involves leading ERP implementations, advising clients on solutions, and contributing to business development... 
    Senior
    Microsoft

    Gross, Mendelsohn & Associates, P.A.

    Fairfax, VA
    5 days ago
  • SwiftCruit is seeking a Sr Microsoft Dynamics and Power Platform Developer to enhance their client's case management systems. You will drive...  ...candidate has 4+ years in CRM solutions, including Dynamics 365, and exhibits strong analytical skills. Flexible working arrangements... 
    Senior
    Microsoft
    Flexible hours

    SwiftCruit

    Mc Lean, VA
    2 days ago
  • A technology solutions provider in McLean, Virginia is looking for a Microsoft Dynamics 365 Developer to implement and modernize IT solutions. In this role, you will collaborate with project teams to deliver software using Microsoft technologies. Ideal candidates have 5... 
    Senior
    Microsoft

    Valid8 Financial, Inc.

    Mc Lean, VA
    3 days ago
  •  ...lifecycle – from proposal initiation, through issuance, negotiation, administration, and closeout – supporting federal, state, and/or local...  ..., and administering subcontract agreements. Proficiency in Microsoft Excel, Word, and Adobe, with strong attention to detail and the... 
    Senior
    Microsoft
    Contract work
    For contractors
    For subcontractor
    Local area

    Eastern Research Group

    Fairfax, VA
    4 days ago
  •  ...Senior ServiceNow Administrator Location: Arlington, VA Clearance: Applicants selected will be subject to a security investigation and may...  ...ServiceNow and other off-premise cloud services such as Microsoft Azure, and between other on-premise FDIC systems. Micro certification... 
    Senior
    Microsoft
    Full time
    Part time
    Work experience placement

    Gridiron IT

    Falls Church, VA
    2 days ago
  • $80.9k - $92.3k

    COMFORT SYSTEMS is looking for a Senior Administrative Assistant to support multiple executives in McLean, VA. The role involves managing complex...  ...2 years of administrative experience, be proficient in Microsoft Office, and possess excellent communication skills. The... 
    Senior
    Microsoft
    Work at office

    COMFORT SYSTEMS

    Mc Lean, VA
    3 days ago
  • Dovel Technologies, Inc. is looking for a Sr Microsoft Dynamics and Power Platform Developer based in McLean, Virginia. This role involves designing and implementing case management solutions, demanding a minimum of five years of experience and a Bachelor's degree. The... 
    Senior
    Microsoft

    Dovel Technologies

    Mc Lean, VA
    3 days ago
  •  ...advance the mission and optimize our business strategy as a Senior Subcontracts Administrator at GDIT. Here, you’ll support solving some of our...  ...large procurement activities Required Technical Skills: Microsoft Office Suite Required Skills and Abilities:... 
    Senior
    Microsoft
    Contract work
    For subcontractor
    Work at office
    3 days per week

    General Dynamics Information Technology

    Herndon, VA
    11 days ago
  • $102k - $170k

     ...Required:Up to 25%Clearance Required:NoneWhat You Will Do:We are looking for a hands-on senior software engineer with deep knowledge of Microsoft Power Apps, including Microsoft Dynamics 365 developer. An expert on Power Apps to design, configure and develop custom... 
    Senior
    Microsoft
    Flexible hours

    Guidehouse

    Mc Lean, VA
    2 days ago
  • Dovel Technologies, Inc is looking for a Microsoft Dynamics and Power Platform Developer to join their team in McLean, Virginia. This full-time position requires expertise in CRM and Power Platform solutions implementation, along with an ability to design and deliver effective... 
    Senior
    Microsoft
    Full time

    Dovel Technologies, Inc

    Mc Lean, VA
    1 day ago
  • $116.7k - $245.6k

     ...and a team that wants you to grow and succeed.  SAP NS2 Senior Cloud Administrator NS2 COMPANY DESCRIPTION SAP is the global market leader...  .... The ideal candidate will have strong experience in Microsoft Azure, Windows administration, identity and access... 
    Senior
    Microsoft
    Hourly pay
    Permanent employment
    Full time
    Worldwide
    Flexible hours

    SAP

    Herndon, VA
    20 days ago
  •  ...Job Description Title: Senior Portfolio Manager Location: Remote Pay...  ...management tools (e.G., Jira, Smartsheet, Microsoft Project, ServiceNow PPM, or equivalent) Experience...  ...Advanced proficiency in Microsoft Office 365, particularly PowerPoint and Excel... 
    Senior
    Microsoft
    Work at office
    Remote work

    LanceSoft

    Reston, VA
    8 hours ago
  •  ...Senior SaaS Platform Engineer CapTech is an award-winning consulting...  ...-on role in the engineering, administration, and evolution of our...  ...subject matter expert for the Microsoft ecosystem (M365, Entra ID, Power...  ...administering: Microsoft 365 (including Entra ID, Power Platform... 
    Senior
    Microsoft
    Visa sponsorship
    Work visa

    CapTech Consulting

    Reston, VA
    1 day ago
  •  ...VA is seeking an Executive Assistant to the Senior Leadership Team. This role involves providing high-level administrative support, managing schedules, and coordinating...  ...excellent organizational skills, proficiency in Microsoft Office, and the ability to handle multiple... 
    Senior
    Microsoft
    Work at office

    Serco

    Herndon, VA
    3 days ago
  •  ...more exclusive features. Job Title: Senior IT System Engineer (Cloud Engineer)...  ...: ~ CompTIA Security+ ~ Microsoft Certified Azure Administrator Senior IT System Engineer (Cloud Engineer...  ...Azure (GCC High) ~ Microsoft 365 (GCC High) ~ Active Directory ~... 
    Senior
    Microsoft
    Contract work
    For contractors
    Local area
    Remote work

    Alta It Services

    Herndon, VA
    4 days ago
  •  ...Senior Software Engineer Job Category Information Technology Market Location VA -...  ...strong hands-on experience with Dynamics 365 CRM or a similar enterprise CRM platform...  ...configure, and support solutions within Microsoft Dynamics 365 CRM, including customizations... 
    Senior
    Microsoft
    Permanent employment
    Full time
    Immediate start

    NVR

    Reston, VA
    1 day ago
  •  ...as JIRA and Confluence. ~ Bachelor's degree in Business Administration, Computer Science, Management Information Systems, or a related...  ...facing, advisory role. Demonstrated success in leading Microsoft Dynamics 365 and Power Platform implementations, with a robust... 
    Senior
    Microsoft
    Temporary work
    Work at office
    Remote work
    Visa sponsorship
    Work visa
    Flexible hours

    CapTech Consulting

    Reston, VA
    1 day ago
  •  ...Federal Services in Reston, VA, is seeking an Executive Administrative Assistant to support senior leadership. This hybrid position requires a minimum of...  ...in time management, communication, and the use of Microsoft tools. A bachelor's degree is required. Join us to contribute... 
    Senior
    Microsoft

    Pci-Federal-Services

    Reston, VA
    3 days ago
  •  ...Description Sierra7, Inc. is seeking a Senior Systems Administrator to support the operation, security,...  ...services, including Active Directory, Microsoft Entra ID, and hybrid identity environments...  ...Manager. Manage Microsoft 365 services and other enterprise collaboration... 
    Senior
    Microsoft
    Temporary work
    Casual work
    Local area
    Monday to Friday
    Flexible hours
    Afternoon shift
    3 days per week

    Goebel Fixture Company

    Reston, VA
    1 day ago
  • $92.3k - $166.85k

     ...Energy and Infrastructure Consulting (E&IC) Division is seeking a Senior Civil/Structural Engineer with strong design knowledge of...  ...hours to support client(s) needs. Proficient in the use of Microsoft 365 and Adobe/Bluebeam. Favorable if you have: Master's degree... 
    Senior
    Microsoft
    Contract work
    Local area
    Immediate start

    Leidos

    Reston, VA
    3 days ago
  •  ...Impactful Solutions. Drive Federal Growth. We are seeking a seasoned Senior Proposal Manager to lead the development of high-impact...  ...to distill complex information into unified messaging Advanced Microsoft Word expertise; proficiency in Microsoft Office (PowerPoint, Visio... 
    Senior
    Microsoft
    Long term contract
    Work at office

    Creative Solutions Services, LLC

    Vienna, VA
    1 day ago
  •  ...and a wellness program. Position Overview: The Branch Administrative Assistant is responsible for providing administrative support...  ...time management and organization skills. Proficient in Microsoft Office. This job description is intended to convey information... 
    Microsoft
    Temporary work
    Work at office
    Local area

    CrossCountry Mortgage Inc

    Vienna, VA
    15 days ago
  • General Dynamics Information Technology is seeking a Senior M365 Systems Engineer to enhance collaboration and automation across the...  ...ideal candidate will have a strong technical background in Microsoft 365 systems, with responsibilities also including driving automation... 
    Senior
    Microsoft

    General Dynamics Information Technology

    Falls Church, VA
    5 days ago
  • $85k - $120k

     ...Position Title: Senior-Level Executive Assistant Position Overview S2Technologies is...  ...Intelligence Agency (DIA) by providing essential administrative and executive support services. This...  ...leadership Advanced proficiency in Microsoft Office Suite (Word, Excel, PowerPoint,... 
    Senior
    Microsoft
    Work at office

    S2 Technologies

    Reston, VA
    3 days ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Senior Microsoft 365 Administrator. Be the first to apply!