Information Systems Security Engineer (ISSE) -TS/SCI at SUNAYU in Arlington, Virginia
- Company: SUNAYU
- Location: Arlington, Virginia
- Posted: Sep 24, 2026
- Type: Full-Time
- Salary: $112,000-$145,000
- Experience: 5+ years
Overview
Sunayu, LLC is searching for an Information Systems Security Engineer (ISSE) to provide cyber security and security engineering services for the National Military Command Center (NMCC) customer including system security engineering, cybersecurity risk assessments, and security architecture support.
Job description
- Sunayu, LLC is searching for an Information Systems Security Engineer (ISSE) to provide cyber security and security engineering services for the National Military Command Center (NMCC) customer including system security engineering, cybersecurity risk assessments, and security architecture support.
- The ISSE shall perform, or review, technical security assessments of computing environments to identify points of vulnerability, noncompliance with established cybersecurity standards and regulations and recommended mitigation strategies.
Responsibilities
- Responsible for building, deploying and Patching HBSS Windows and ACAS RedHat Linux 7.9 and 8 servers.
- Responsible for building, maintaining, and patching all ePO, Security Center, and Nessus servers.
- Provides Security Center accounts for Vulnerability Managers to scan devices within ACAS.
- Experience with ACAS scan results and how to remediate vulnerability findings.Knowledge of the process of obtaining licenses for all HBSS ePO’s and Tenable Security Centers.
- Expertise in the process of obtaining HBSS and ACAS kickstart ISOs from DISA.
- Extensive knowledge of building virtual servers, deploying, and patching all McAfee modules via the ePO, configuring McAfee policies for each environment STIGing HBSS Windows OS,McAfee policies to comply with benchmarks (Not reviewing or confirming), STIGing ACAS RHEL servers.
- Ability to Run SCAP scans on Windows and RHEL servers.
- Displays knowledge of updating RedHat 7.9 and 8 as they are released
- Setup RedHat yum local rpm repositories to patch offline ACAS servers.
- Deploying Rogue sensors on each subnet
- Identifying Rogue subnets and, rogue endpoints.
- Able to troubleshoot Security Center and Nessus scanner issues.
- Design, implement, and maintain complex information technology systems.
- To include designing the basic computing infrastructure to accomplish key tasks, establishing networking rules for cybersecurity, and troubleshooting network errors or other technical issues.
- Lead the development of technical solutions, from refining customer requirements through design, build, test, and deployment.
- Document and communicate technical solutions and results of analyses leading to recommended courses of action.
Requirements
- Qualified candidates must possess a TS/SCI security clearance.
- Security+
- 5+ years of experience in understanding all aspects of systems engineering, including design and architecture.
- Demonstrated capability to identify security risks throughout information system network structures to include the Operating Systems, hardware, and various data transfer protocols.
- Effective communication and presentation skills (i.e., ability to present ideas effectively in formal and informal situations in group and individual settings).
- Strong planning, organizational, and time management skills (i.e., ability to effectively plan, organize, and prioritize work, and to control and follow up to assure work completion).
- Demonstrated initiative (i.e. initiate appropriate action without being directed) and ability to work independently.
- A bachelor’s degree in computer science, information technology, or related.
- A master’s degree (in subjects described above) and 3 years of experience.
- No degree with 12 years of intensive and progressive experience demonstrating the required proficiency levels related to the task.
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Skills
Required
- TS/SCI security clearance
- Security+
- HBSS Windows
- ACAS RedHat Linux 7.9 and 8
- ePO
- Security Center
- Nessus
- ACAS scan results
- Vulnerability remediation
- McAfee modules
- STIGing
- SCAP scans
Benefits
- 3 Medical Plan Options
- Dental and Vision
- 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)
- 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.
- $112,000-$145,000
About SUNAYU
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 mission—we 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.