S-Systems Administrator (Linux) - TS/SCI w/ Polygraph

Company: Sunayu
Location: Gambrills
Posted on: February 19, 2026

Job Description:

Job Description Job Description Salary: $150,000 - $170,000 Location: Annapolis Junction, MD Category: Systems Administrator - Must have Linux experience Travel Required:No Remote Type: No Clearance: TS/SCI w/ Polygraph System Administrator -Linux Must have experience installing, updating, and upgrading Linux Operating Systems (OS). Must have experience with utilities used to manage Linux OS disk file systems. Must have experience analyzing and implementing Security Technical Implementation Guide (STIG) requirements in Linux OS. Must have experience with utilities used to create and configure network connections in Linux OS. Must have experience implementing Windows Active Directory User Authentication in Linux OS. Must be proficient in reading and modifying User/Group permissions in Linux OS. Must be proficient in reading, analyzing, and troubleshooting errors within Linux OS Primary Responsibilities The selected individual will be responsible for monitoring infrastructure systems, applications, and processes, and for ensuring that all issues are identified, tracked, and resolved in a timely manner. She/he will provide support for all infrastructure systems and will respond to hardware and software incidents and work with senior system administrators, at times remotely from other locations. Other responsibilities include: Quickly responding to IT Help Desk calls and emails in a professional manner; ensuring issues are resolved and/or escalated to the appropriate teams; and following up with teams and users to ensure issues are satisfactorily remediated. Identifying, troubleshooting, and correcting hardware and software issues including network connectivity. Utilizing enterprise monitoring solutions to identify alarms that have been triggered against the various environments. Proactively contacting customers when infrastructure processes are significantly delayed or may impact their ability to complete a business function on time. Executing the process for managing information assurance vulnerability alerts (IAVAs) and system security scanning for equipment suites in accordance with the System Security Plans for these systems to rapidly and accurately identify and remediate IAVAs. Initiating IAVA responses and system security scans, completing remediation, and extending IAVA patches and security updates on various IT and network systems. Providing technical assistance to companion work groups in support of overlapping projects such as implementing IT enhancements and optimizing systems. Maintaining good inter-departmental relations, communicating with users, and publishing status of system outages. Participating in the creation and ongoing maintenance of documentation to ensure clear, concise and accurate information is readily available to assist with incident resolution. Required Qualifications Must have at least 5 years of direct, hands-on experience providing assistance to users in an IT customer service capacity. Must have at least 5 years of experience working on an IT/software program that utilizes complex equipment/systems (ex. Network Switches, Routers, LANs, & cabling, Windows/Linux operating systems, VMware, etc.). Must have experience installing, updating, and upgrading Linux Operating Systems (OS). Must have experience with utilities used to manage Linux OS disk file systems. Must have experience analyzing and implementing Security Technical Implementation Guide (STIG) requirements in Linux OS. Must have experience with utilities used to create and configure network connections in Linux OS. Must have experience implementing Windows Active Directory User Authentication in Linux OS. Must be proficient in reading and modifying User/Group permissions in Linux OS. Must be proficient in reading, analyzing, and troubleshooting errors within Linux OS. Must have experience with IT system optimization, monitoring, and technical set-up and troubleshooting. Must have experience with Data Center design and configuration (e.g. rack and stack, power, placement, etc.). Must have experience gathering data for and documenting technical processes. Must have experience documenting IT issues and providing detailed and comprehensive status reports and follow-ups. Must have experience Analyzing and addressing IAVAs/CVEs (response and remediation, system security scans, extending IAVA patches and security updates on IT and network systems, etc). Must be committed to adopting and adhering to best practices including compliance with maintenance windows and change control procedures. Must possess strong analytic abilities and must be meticulous and careful in their work. Must be an independent thinker capable of working independently as well as within a team. Must be able to respond to emergency system administration, operations, and maintenance problems, on a limited as-needed on-call basis. Must be able to travel up to 25% of the time to local program locations (not overnight). Additional travel to CONUS and OCONUS location(s) may also be required (overnight). Preferred Qualifications BS degree in a technical field and at least 8 years of relevant experience. Experience with security standards, software architectures, and Network security technologies (Multiple Domain, PKI, SSP, Vulnerability Assessment, etc.). Experience working with Enterprise Domain Services. Experience building and deploying Virtual Machines within an On-Premises Data Center. Experience with scripting and/or automation tools. Experience reading, analyzing, and addressing security vulnerabilities discovered from automated scanning tools. Experience supporting a large, complex software configuration management and development program. Experience working in an Agile Development Environment or on an Agile Team. Who We Are Sunayu, LLC serves as a premier technology partner to the Defense and Intelligence communities, delivering mission-critical engineering solutions across the nation. Our operations are anchored in a commitment to trust, accountability, and ethical transparency, ensuring the high-performance outcomes necessary to protect our country's most vital interests. Culture Our strength lies in our community: Our team prioritizes collaboration, professional growth, and encourages open communication. At Sunayu, we don't just secure the missionwe grow together. Career Development We support and encourage our team members to continue their professional growth by providing company-reimbursed training and continuing education of up to $5,000 per year. We also participate in many industry conferences and events where we share our expertise and experiences. Pay Rate Salary range 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 3 Medical Plan Options Dental and Vision FSA, DCFSA, HSA Life/AD&D Insurance Short-Term & Long-Term Disability Employee Assistance Program (EAP) Training and Educational Assistance Paid Time Off (PTO) 11 Federal holidays 401k plan with up to a 6% match (100% immediate vesting) Equal Opportunity Employer Sunayu, LLC is an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, gender expression, national origin, age, protected veteran status, disability status, marital status, genetic information, medical condition, or any other characteristic protected by law.

Keywords: Sunayu, Annandale , S-Systems Administrator (Linux) - TS/SCI w/ Polygraph, IT / Software / Systems , Gambrills, Virginia