Information Systems Security Engineer (ISSE)

Information Systems Security Engineer (ISSE) We are seeking a highly skilled and mission-driven Information Systems Security Engineer (ISSE) to support advanced cyber engineering activities for NNSA HQ OCIO Special Technologies. The ISSE will operate within an EOS-driven environment, contributing to quarterly Rocks, scorecard metrics, and team-aligned objectives. This role requires deep technical expertise, strong analytical capabilities, and the ability to design innovative cybersecurity solutions in collaboration with senior cyber-SMEs, including guidance from the program's Tier 3+ cybersecurity advisor. The ISSE will solve complex cybersecurity challenges, develop technical solutions, support multi-lab assessments, and contribute to mission-critical security engineering for DOE/NNSA programs. Key Responsibilities Conduct advanced cyber engineering activities using modern toolsets and methodologies. Collaborate with SMEs and program managers to design innovative solutions for complex cybersecurity challenges, including critical infrastructure, ICS security, and information security. Develop and deliver cybersecurity training to domestic and international partners. Provide cybersecurity expertise as part of multidisciplinary and multi-lab teams supporting DOE/NNSA's DNN mission. Develop software and technical solutions in support of GMS missions and sponsor requirements. Engage frequently with cybersecurity experts to share knowledge, align on deliverables, and strengthen team outcomes. Independently design technical solutions; analyze sponsor requirements; implement software and perform technical analyses. Manage multiple concurrent tasks and stakeholder priorities to meet deadlines and program objectives. Demonstrate expertise with Splunk, RSA, Tenable Nessus, and SELinux. Apply strong understanding of ports, protocols, and services to support secure system and network design. Assist architects and system developers in implementing appropriate security functionality aligned with agency policy and enterprise solutions. Contribute to security planning, assessments, risk analysis, risk management, certification, and awareness activities. Additional Responsibilities Support audits, reviews, and compliance activities; manage findings and drive favorable outcomes. Develop new policy, documentation, and training materials when required; negotiate adoption across contractor and federal stakeholders. Ensure alignment with EOS expectations, including quarterly Rocks, scorecard metrics, and team accountability. Required Qualifications Experience performing cybersecurity engineering in federal or national security environments. Strong technical background with Splunk, RSA, Tenable Nessus, SELinux, and secure network/system design. Ability to design, document, and communicate complex cybersecurity solutions. Experience supporting multi-disciplinary teams and mission-driven cybersecurity programs. Strong understanding of ports, protocols, services, and secure system architecture. A notification to prospective applicants that reviews, and tests for the absence of any illegal drug as defined in 10 CFR 707.4, will be conducted by the employer and a background investigation by the Federal government may be required to obtain an access authorization prior to employment, and that subsequent reinvestigations may be required. The position is covered by the Counterintelligence Evaluation Program regulations at 10 CFR part 709, the announcement should also alert applicants that successful completion of a counterintelligence evaluation may include a counterintelligence-scope polygraph examination. As a federal contractor, we are committed to fair and equitable employment practices. We make employment decisions based on job-related qualifications, merit, contract requirements, and legitimate business needs, and prohibit unlawful discrimination in all employment practices. As a federal contractor, we comply with Section 503 of the Rehabilitation Act and VEVRAA. No disability-related inquiries will be made prior to a conditional offer of employment, except as permitted by applicable law. Employee Rights Under the National Labor Relations Act (NLRA): As a federal contractor, the Company complies with Executive Order 13496 and informs employees of their rights under the National Labor Relations Act. Information regarding these rights is available at the workplace and from the National Labor Relations Board. This position is covered by the Service Contract Labor Standards (SCLS). Compensation and fringe benefits will be provided in accordance with the applicable U.S. Department of Labor wage determination and any applicable collective bargaining agreement. Medical, dental, vision, and 401k benefits are included with this position. Powder River Industries LLC