Systems Engineer III with Security Clearance

Systems Engineer III Linthicum Heights, MD Support mission-critical efforts for the United States Air Force and The Defense Cyber Crime Center (DC3) by serving as a systems engineer / ACAS engineer in high-responsibility environments. Before You Apply This is a full-time W-2 position with Allyon. * Active TS clearance with SCI eligibility * Bachelor's, Master's, or PhD with relevant experience required Candidates cannot proceed in the application process without meeting the required qualifications listed above. Allyon does not sponsor security clearances and does not offer C2C opportunities for this role. Why This Role Matters By supporting the United States Air Force and DC3, your work directly contributes to protecting mission-critical systems and enabling proactive defense strategies. If you thrive in deep technical analysis and enjoy solving complex problems, this role offers immediate impact. What You Will Do You will support engineering and technical efforts by: * Develop implementation, guidance, best practice information, schedules, and detailed product feature specifications to support integration of ACAS enterprise servers and services. * Provide solution engineering to ensure systems and components meet current and future standards. * ACAS Administration. * Conduct testing of new ACAS technologies and create documentation to meet suspense dates. * Provide performance tuning to systems and investigate issues with Tenable spanning a large and complex environment. * Deploy, maintain, and perform tuning of Tenable scanners to meet current and future needs. * Develop, create, deploy, and manage Tenable scan configurations to support scanning services to global enterprise. * Ensure that the ACAS scanners and Security Center are operational and reporting properly. * Assist customers in resolving ACAS issues, make recommendations as needed. * Perform recurring vulnerability scans and create repositories, queries, and dashboards as necessary to ensure vulnerability report information is available. * Investigate false positives or potentially confusing scan data results. * Update and maintain tracking mechanism for false positives and track false positives until the finding is corrected; provide results upon resolution. * Create/Update all documentation needed to support the ACAS teams requirements, taskings, deliverables, and maintenance of the ACAS solution. * Install and configure updates to Tenable software as released and in compliance with STIG requirements. * Perform site-specific Tier II support such as risk mitigation activities as part of change/configuration management to ensure smooth implementation and transition to ACAS. * Support the research and analysis of DoD and AF policies and tasking orders to mitigate implementation problems that may impact the ACAS implementation. * Create, modify, maintain, or provide input for supporting documentation to include, but not limited to system design specifications, diagrams, ports and protocols reports, implementation plans, process guides, security impact assessments, risk analysis, milestone forecasting, testing procedures, use cases, compliance documentation, eMASS and RMF support. * Motivated self-starter with strong written and verbal communication skills, and the ability to create complex technical reports on analytic finding. * Strong analytical and troubleshooting skills. * Non-Domain joinable device scanning. Required Qualifications * Education/Experience Requirements: Bachelor's degree with 5+ years of relevant experience, or Master's with 3+ years of relevant experience. The degree should be in one of the following fields: Computer Science, Cybersecurity, Data Science, Information Systems, Mathematics, Software Engineering, or Information Technology. In lieu of a degree in one of these fields of study, 4 years of additional relevant experience or specialized training may be accepted. * Clearance Requirement: Active TS clearance, SCI eligible * Certification Requirements: Must attach a copy of the certification * Active CompTIA Security+ certification * DISA ACAS certification * Skills and expertise in the following technologies: SQL/XSQL Server Administrator (SA), MAC O/S and security, Information Assurance (IA), IP Data Networking and Vulnerability Assessment product engineering and design, REM 3.X/Retina 5.X and greater. Implementing National Institute of Standards and Technology (NIST) and RMF standards and framework. * Experience running ACAS on Red Hat Enterprise Linux (RHEL). * Hands-on experience with general RHEL administration and troubleshooting. * Demonstrated experience with multiple network security zones, subnetting, VRFs, and VLANs. * 8+ years of IT related experience preferred. * 4-6 years Red Hat experience in a DoD enterprise network environment. * 4-6 years of experience with Assured Compliance Assessment Solution (ACAS). * RHCSA / Linux+ / Solaris, DISA ACAS 5.x preferred. What's In It For You At Allyon, your compensation goes beyond salary. Our Total Rewards program is designed to lower your costs, support your wellbeing, and give you confidence in your future. * Four flexible medical plan options with premiums averaging 15% below industry benchmarks * Up to $1,800 in annual wellness incentives plus monthly rewards that put money back in your pocket * $0 telemedicine visits and open access provider networks with transparent pricing * 401(k) with modern planning tools plus HSA and FSA options for tax advantaged savings * Dental, vision, life, disability, and supplemental coverage including accident and critical illness * Paid time off starting on day one plus flexibility to support balance Your compensation is designed to make a real difference day to day, giving you the support and confidence to do your best work and live well outside of it. The expected salary range for this position is $95,000 to $115,000. Compensation is determined based on experience, technical expertise, certifications, clearance level, and alignment to mission requirements and work location. Allyon offers a comprehensive total rewards package including benefits, and retirement contributions. About Allyon Allyon is a Federal solutions partner supporting Department of War, Intelligence, and Civilian agencies through expertise in Cybersecurity, Cloud Infrastructure & Engineering, Enterprise IT, and Program Management. For more than 15 years, we have helped government teams operate securely, efficiently, and confidently by delivering solutions that keep critical missions moving. Our belief is simple. Mission success is built by people. We invest in our teams, our systems, and our culture with intention so our people can perform at their best and deliver when it matters most. The Bottom Line Ready to do meaningful work that supports real-world mission impact? At Allyon, culture drives performance. We combine mission-critical work with a Total Rewards approach that invests in your health, financial security, and long-term growth. If you want your skills to matter, your contributions to be recognized, and your compensation to reflect your value, this is your opportunity. Apply today and join a people-powered team focused on mission success.