Classified IT System Administrator / Onsite: PA, AL, CA, FL or CO

Company: Lockheed Martin
Location: King of Prussia
Posted on: April 2, 2026

Job Description:

Job Description This Enterprise Operations position supports the DarkStar Enterprise network, delivering secure, mission-critical IT capabilities to collateral Secret programs across the enterprise. As a Systems Administrator, you will play a direct role in enabling national security objectives by ensuring the reliability, performance, and security of classified infrastructure used by critical programs. This is a hands-on position focused on resolving technical challenges across applications, systems, and network connectivity within a classified environment. You will be part of a high-performing team responsible for maintaining and defending enterprise IT systems that operate in complex, security-constrained environments. The selected candidate will administer and support Linux and/or Windows systems, network components, and storage platforms. Responsibilities include system installation, configuration, maintenance, and troubleshooting to ensure continuous availability of mission systems. You will actively contribute to Information Assurance efforts by performing vulnerability scans, remediating security findings, applying patches, and implementing system hardening in compliance with stringent security requirements. Additionally, you will ensure all enterprise assets and software are properly tracked, controlled, and audit-ready. Working alongside engineers, cybersecurity professionals, and program stakeholders, you will support system integration, upgrades, and sustainment activities across the full system lifecycle. You will help resolve incidents, execute changes, and improve operational processes that directly impact mission success. This is an Onsite role, and can be located in one of the following locations: - King of Prussia, PA - Huntsville, AL - Littleton, CO - Sunnyvale, CA - Titusville, FL This role operates on a 4x10 schedule and may include off-shift hours, weekends, and occasional travel in support of mission needs. Basic Qualifications - US Citizenship (no dual citizenship), with Ability and willingness to obtain Top Secret Clearance - Demonstrated work experience with system administration in one or more areas: Linux, Windows, networking, or storage - Experience troubleshooting and resolving technical issues in an IT environment - Familiarity with system maintenance activities such as patching, updates, and configuration management - Understanding of basic networking concepts (IP, DNS, routing, etc.) - Experience supporting users and resolving hardware/software issues - Ability to follow established processes for incident, change, and problem management - Strong communication skills and ability to work effectively in a team environment Desired skills - Active Secret or Top Secret clearance - At least 2 years of experience administering Linux and/or Windows server environments - Experience with virtualization technologies (VMware, KVM, or similar) - Experience with storage systems (e.g., NetApp or similar platforms) - Knowledge of Active Directory, domain services, and Windows/Linux integration - Experience with system hardening, vulnerability scanning, and remediation practices - Familiarity with automation tools (e.g., Ansible) - Scripting experience (e.g., Python, Bash, or PowerShell) - Experience working in classified or air-gapped environments - Familiarity with encryption technologies (SSL/TLS) and certificate management Lockheed Martin is an equal opportunity employer. Qualified candidates will be considered without regard to legally protected characteristics. The application window will close in 90 days; applicants are encouraged to apply within 5 - 30 days of the requisition posting date in order to receive optimal consideration. * At Lockheed Martin, we use our passion for purposeful innovation to help keep people safe and solve the world's most complex challenges. Our people are some of the greatest minds in the industry and truly make Lockheed Martin a great place to work. With our employees as our priority, we provide diverse career opportunities designed to propel, develop, and boost agility. Our flexible schedules, competitive pay, and comprehensive benefits enable our employees to live a healthy, fulfilling life at and outside of work. We place an emphasis on empowering our employees by fostering an inclusive environment built upon integrity and corporate responsibility. If this sounds like a culture you connect with, you’re invited to apply for this role. Or, if you are unsure whether your experience aligns with the requirements of this position, we encourage you to search on Lockheed Martin Jobs , and apply for roles that align with your qualifications. Other Important Information By applying to this job, you are expressing interest in this position and could be considered for other career opportunities where similar skills and requirements have been identified as a match. Should this match be identified you may be contacted for this and future openings. Ability to work remotely Onsite Full-time: The work associated with this position will be performed onsite at a designated Lockheed Martin facility. Work Schedule Information Lockheed Martin supports a variety of alternate work schedules that provide additional flexibility to our employees. Schedules range from standard 40 hours over a five day work week while others may be condensed. These condensed schedules provide employees with additional time away from the office and are in addition to our Paid Time off benefits. Security Clearance Information This position requires a government security clearance, you must be a US Citizen for consideration. Pay Rate: The annual base salary range for this position in California, Massachusetts, and New York (excluding most major metropolitan areas), Colorado, Hawaii, Illinois, Maryland, Minnesota, New Jersey, Vermont, Washington or Washington DC is $70,100 - $123,625. For states not referenced above, the salary range for this position will reflect the candidate’s final work location. Please note that the salary information is a general guideline only. Lockheed Martin considers factors such as (but not limited to) scope and responsibilities of the position, candidate's work experience, education/ training, key skills as well as market and business considerations when extending an offer. Benefits offered: Medical, Dental, Vision, Life Insurance, Short-Term Disability, Long-Term Disability, 401(k) match, Flexible Spending Accounts, EAP, Education Assistance, Parental Leave, Paid time off, and Holidays. (Washington state applicants only) Non-represented full-time employees: accrue at least 10 hours per month of Paid Time Off (PTO) to be used for incidental absences and other reasons; receive at least 90 hours for holidays. Represented full time employees accrue 6.67 hours of Vacation per month; accrue up to 52 hours of sick leave annually; receive at least 96 hours for holidays. PTO, Vacation, sick leave, and holiday hours are prorated based on start date during the calendar year. This position is incentive plan eligible. Pay Rate: The annual base salary range for this position in most major metropolitan areas in California, Massachusetts, and New York is $80,600 - $139,840. For states not referenced above, the salary range for this position will reflect the candidate’s final work location. Please note that the salary information is a general guideline only. Lockheed Martin considers factors such as (but not limited to) scope and responsibilities of the position, candidate's work experience, education/ training, key skills as well as market and business considerations when extending an offer. Benefits offered: Medical, Dental, Vision, Life Insurance, Short-Term Disability, Long-Term Disability, 401(k) match, Flexible Spending Accounts, EAP, Education Assistance, Parental Leave, Paid time off, and Holidays. This position is incentive plan eligible.

Keywords: Lockheed Martin, Plainfield , Classified IT System Administrator / Onsite: PA, AL, CA, FL or CO, IT / Software / Systems , King of Prussia, New Jersey