Cyber Systems Security Engineer

We are seeking a Cyber Systems Security Engineer (CSSE) to support a MILSATCOM program. This position plays a critical role in protecting space and ground assets from cyber threats and ensuring mission continuity through proactive cybersecurity engineering, monitoring, and risk mitigation. This role involves a blend of systems engineering, cyber threat analysis, vulnerability remediation, and compliance support. You will operate in a highly secure, mission-critical DoD environment with direct involvement in the cyber defense of national space communication systems.

Job Responsibilities:

• Maintain continuous awareness of current and emerging cyber threats relevant to space and ground systems.
• Analyze threat intelligence to assess potential system impacts and recommend mitigation strategies.
• Develop and recommend Courses of Action (COAs) to address and prioritize cybersecurity risks.
• Create and maintain cyber incident response and mission recovery procedures.
• Support the development of Tactics, Techniques, and Procedures (TTPs) for cyber event response and mission continuity.
• Support the integration and operation of intrusion detection/protection systems (HIDS, NIDS, IPS) within MILSATCOM environments.
• Analyze and report data from tools such as DISA Endpoint Security Solution (ESS) and ACAS.
• Serve as the operational point of contact for the cybersecurity tool suite (Cybersecurity Subsystem - CSS).
• Administer access and monitoring for CSS tools such as Splunk, ACAS, and ESS.
• Conduct Tier 1 troubleshooting of cybersecurity tools and services.
• Prepare and maintain RMF artifact delivery schedules and submission tracking.
• Develop and update system documentation, including hardware/software baselines, PPSM, and network diagrams.
• Coordinate directly with Information System Security Officers (ISSOs) and ISSMs to ensure RMF compliance.
• Perform network vulnerability scans, analyze findings, and prioritize remediation efforts.
• Execute STIG scanning and baseline hardening activities across operating systems and applications.
• Deliver fully tested vulnerability patches and virus signature updates on a regular and emergency basis, with Government approval.
• Support creation and updates of Security Assessment Plans (SAPs) and related artifacts.
• Provide cybersecurity engineering expertise in technical meetings and working groups.
• Collaborate with government personnel and other engineering teams to support ongoing system sustainment and cybersecurity posture improvements.

Required Skills:

• Minimum 7+ years of experience in cybersecurity engineering, preferably supporting DoD or space-related systems
• Experience with RMF, DISA STIGs, and system accreditation processes
• Proficiency with vulnerability management tools such as ACAS, Splunk, and ESS
• Experience with network and host-based intrusion detection/prevention systems (HIDS/NIDS/IPS)
• Strong knowledge of DoD cybersecurity frameworks and best practices
• Bachelor's degree in Computer Science, Information Systems, Engineering, or a related technical field (or equivalent experience)

Preferred Qualifications:

• CISSP, CASP+, or CEH certification
• Familiarity with satellite communications (SATCOM) systems and mission ground segments
• Experience supporting MILSATCOM or other protected tactical communications systems
• Knowledge of Agile and DevSecOps methodologies
• Familiarity with scripting languages (PowerShell, Python, etc.)

Company Benefits:

Cornerstone Defense offers a comprehensive list of benefits, designed to give employees and their families several options to choose from when selecting benefits that best fit their needs. These offerings include not only a full suite of the traditional Medical/Dental/Vision insurances, but also a number of other benefits and perks to include, but not limited to: A 401(K) plan with a company match, tuition and training assistances, paid vacation/leave, a fitness reimbursement program, college savings plan, commuter benefits, financial advisory services, flex spending accounts, health savings accounts, STD/LTD coverage, life and AD&D insurance, employee assistance programs, life financial planning assistance, and legal resources.