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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # IT Systems Administrator - **Company:** Applied Physical Sciences Corp. - **Location:** Groton, CT, United States - **Experience:** Expert - **Contract:** Internship / Graduate position - **Skills:** Microsoft Windows, Cyber Security, Data Governance, Information Technology Operations, Linux System Administration, Server Administration, Security Information and Event Management, Virtualization Technology, Information Technology, Nessus - **Published:** July 9, 2026 - **Apply:** https://aphysci.com/jobs/senior-it-systems-administrator-req-339/ ## About the Role Applied Physical Sciences (APS), a subsidiary of General Dynamics, is seeking a highly motivated and experienced Senior IT Systems Administrator to join our growing team. In this critical role, you will support and enhance enterprise-level information systems while driving the adoption of new technologies across the organization., * Professional experience of 7 or more years is desired but may not be required in all circumstances. * A strong track record supporting enterprise IT systems across desktop support, server administration, virtualization, compliance, and cybersecurity operations. * Experience with end-user support, break/fix tasks, and routine IT operations. * Experience evaluating and implementing new systems based on business needs. * Familiarity with Microsoft 365 administration and enterprise Windows environments. * Experience supporting IT regulatory compliance programs (e.g., NIST 800-171, CMMC). * Ability to obtain and maintain a DoD Secret security clearance (U.S. citizenship required). Preferred Attributes and Skills: * Experience with Microsoft Purview and data governance programs, both designing and implementing them. * SIEM experience and comfort investigating security alerts. * Linux administration capability in an enterprise setting. * Experience managing a Microsoft 365 GCC-High tenant. * Knowledge of L2/L3 networking. * Familiarity with Tenable.SC or Nessus vulnerability platforms. * Strong documentation and communication skills. This position is located in the Groton, CT office. APS, a wholly owned subsidiary of the General Dynamics Corporation, offers competitive salaries, excellent benefits, and comfortable working conditions. Candidates must possess or be able to obtain a DoD security clearance. Please note, obtaining a security clearance is a condition of employment which typically requires US citizenship and a thorough background investigation. ## Description * Contribute to IT and cybersecurity compliance initiatives, including NIST 800-171 and CMMC frameworks, by writing/revising policy, implementing processes, and maintaining audit records. * Design, Deploy, implement, and support new technologies for both end users and administrators, across on-prem and cloud environments. * Lead and support IT break/fix escalations, operations, updates, lifecycle refreshes, and add/change activities. * Help manage records labeling and retention efforts. * Manage and remediate vulnerabilities in CUI and higher classification networks to maintain a secure, compliant enterprise environment. * Support cybersecurity monitoring, analysis, and response efforts., I understand and agree that the information provided in this application will be relied upon by General Dynamics Applied Physical Sciences Corp. in considering me for employment, and I certify that all information provided is true, complete and correct and that I have not knowingly omitted any requested information. I further understand that any false or misleading statements or omissions made by me on this application or any other company records may subject me to immediate dismissal at any time during my employment. I hereby authorize General Dynamics Applied Physical Sciences Corp. to make a thorough investigation of my current or former employment and activities. I agree to cooperate in such investigation and I release General Dynamics Applied Physical Sciences Corp. and any person or organization supplying information to General Dynamics Applied Physical Sciences Corp. in connection with such investigation, of and from liability in connection with the furnishing or use of such information. If employment is obtained under this application, I will willingly comply with all orders, rules, regulations and standards of conduct required by General Dynamics Applied Physical Sciences Corp. and will agree to abide by General Dynamics Standards of Business Ethics and Conduct. I further understand that as a condition of employment by General Dynamics Applied Physical Sciences Corp., I must comply with security procedures of the Company and must receive and retain necessary government security clearances, which may require completion of a government Personal Security Questionnaire and fingerprinting. ## Related Videos - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) - [Data Governance in the Era of AI](https://www.wearedevelopers.com/videos/1622-data-governance-in-the-era-of-ai) - [Thinking Differently - How to Make Money from Cyber Attacks & Cheats](https://www.wearedevelopers.com/videos/745-thinking-differently-how-to-make-money-from-cyber-attacks-cheats) - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [AI beyond the code: Master your organisational AI implementation.](https://www.wearedevelopers.com/videos/1248-ai-beyond-the-code-master-your-organisational-ai-implementation) - [Cyber Security: Small, and Large!](https://www.wearedevelopers.com/videos/259-cyber-security-small-and-large) ## Related Articles - [Best Paying Jobs in Technology](https://www.wearedevelopers.com/magazine/256-best-paying-jobs-in-technology) - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing) - [A Guide to Green Tech and Green IT Careers](https://www.wearedevelopers.com/magazine/374-a-guide-to-green-tech-and-green-it-careers) - [Dev Digest 162: AI careers, MCP, AWS best practices & floppy sweaters](https://www.wearedevelopers.com/magazine/571-dev-digest-162-ai-careers-mcp-aws-best-practices-floppy-sweaters) - [The Most Popular IT Jobs on the Market](https://www.wearedevelopers.com/magazine/376-the-most-popular-it-jobs-on-the-market) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers)