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SharePoint Administrator

Castalia Systems
paid holidays, 401(k)
United States, Virginia, Arlington
Jan 13, 2026

Job Type: Full- Time

Workplace Type: Onsite in Arlington, VA

Clearance: Active TS/SCI and must be able to obtain a DHS Suitability

Must be a U.S. Citizen

Benefits: Medical, dental, and vision coverage, 401k matching, generous PTO, paid holidays, professional training opportunities, and even pet insurance to ensure your furry friends are cared for too.

Job Summary

Castalia Systems is supporting a U.S. Government customer to provide support for onsite incident response to civilian Government agencies and critical asset owners who experience cyber-attacks, providing immediate investigation and resolution. Contract personnel perform investigations to characterize the severity of breaches, develop mitigation plans, and assist with the restoration of services. Castalia is seeking a SharePoint Administrator to support the design, development, and deployment of advanced cybersecurity capabilities in the customer environment supporting analysts and business continuity of the customer mission.

Roles and Responsibilities

A qualified candidate will perform the following duties and responsibilities, but are not limited to:



  • Designing, implementing and maintaining SharePoint capabilities across multiple domains.
  • Designing and developing SharePoint websites using SharePoint designer or web UI developing tools;
  • Developing SharePoint workflows and application development
  • Providing ongoing SharePoint systems administration, technical support, upgrades, patching and troubleshooting services.
  • Examining and identifying efficiencies that can be made to existing procedures, with approval from the customer.
  • Managing assigned project components to deliver services in accordance with established objectives.
  • Employ security concepts, theories, insights, tools and methodologies to mitigate system weaknesses and vulnerabilities.


Required Qualifications:



  • 5+ years of directly relevant experience as a SharePoint Administrator.
  • BS Computer Science, Computer Engineering, Computer Information Systems, Computer Systems Engineering or related degree or HS Diploma and 7+ years lab management or systems administration experience.
  • Familiarity with JavaScript, HTML5, CSS, XML, jQuery, SQL Server, and Web Services.
  • Experience in gathering requirements and developing SharePoint solutions for business users.
  • Experience testing and debugging existing code, updating SharePoint apps and workflows to work with new versions of SharePoint.
  • Experience with Windows Server OS, IIS, AD, #.NET, Word Press, Linux.
  • Must be able to work collaboratively across physical locations.


Desired Qualifications:



  • Experience with writing technical procedures and standard operating procedures.
  • Experience with SharePoint Records Management system

    • Desired Certifications:

      • DoD 8140.01 IAT Level II






Physical Requirements/Work Environment



  • Normal office environment.


Travel

Less than 5%.

Company Description

Castalia Systems is a proven business partner providing mission critical solutions to the Federal Government. We provide cutting edge solutions from Securing and Managing Data to Systems Engineering and Development. Castalia Systems is a pioneer in Artificial Intelligence Design and Application.

With our vast knowledge of our customers' needs and relevant technology, our team is able to bring successful solutions to every mission. We are one-upping our competitors by providing premium IT solutions and platforms with cutting-edge technology so it's so evident when you compare us with anyone.

Disclaimer

Castalia Systems is an equal employment opportunity and affirmative action employer and strives to comply with all applicable laws prohibiting discrimination based on race, color, creed, sex, sexual orientation, age, national origin, or ancestry, physical or mental disability, veteran status, marital status, HIV-positive status, as well as any other category protected by federal, state, or local laws. All such discrimination is unlawful, and all persons involved in the operations of the company are prohibited from engaging in this type of conduct.

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