Junior Security Engineer - Endpoint Specialist

Expression is seeking a mission-driven Endpoint Security Engineer to support the National Telecommunications and Information Administration (NTIA). This individual will play a critical role in ensuring the security and compliance of NTIA systems and endpoints, delivering vulnerability assessments, supporting Certification & Accreditation (C&A) processes, and aligning systems with federal cybersecurity mandates for various information systems. . The position requires technical expertise in endpoint protection, vulnerability management, and secure information systems engineering in federal environments.

Location and Clearance

• Washington, DC
• Active Secret or Top Secret clearance required (U.S. Citizenship required)
  
  

Responsibilities

• Assist in the engineer, maintenance, and monitoring endpoint security solutions to ensure compliance with federal security standards.
• Perform vulnerability and risk analyses of information systems and applications throughout the system development life cycle.
• Provide technical support for monitoring, patching, and troubleshooting of LAN, network devices, and endpoint systems.
• Troubleshoot and resolve routine network and endpoint security issues to ensure system availability and security.
• Support Senior Engineers with C&A activities by preparing documentation, conducting assessments, and presenting findings to leadership.
• Assist with the evaluation and integration of hardware, software, and telecommunications equipment to meet security requirements.
• Install and maintain network operating systems, ensuring alignment with organizational and federal security policies.
• Conduct proactive vulnerability scanning and reporting to stakeholders, recommending remediation strategies.
• Contribute to SOC and cybersecurity team efforts by coordinating on incident escalations and security improvements.
  
  

Qualifications

• Bachelor’s degree in Information Systems, Computer Science, Engineering, or related field (or equivalent practical experience).
• Minimum of 2 years of experience in endpoint security engineering, vulnerability management, or related cybersecurity functions.
• Knowledge of LAN/WAN, endpoint security tools, and network operating systems.
• Strong understanding of federal cybersecurity compliance requirements.
• Ability to troubleshoot technical issues and provide timely solutions.
• Extensive knowledge in various operating systems (e.g. Windows, macOS, Linux and Unix).
• Excellent communication and documentation skills.
  
  

Preferred Experience

• Professional certifications such as CompTIA Security , GSEC (GIAC Security Essentials), Microsoft SC-900 / AZ-500, or AWS Security Certification.
• Prior experience supporting NTIA, Department of Commerce, or other federal civilian agencies.
• Familiarity with NIST Cybersecurity Framework, Risk Management Framework (RMF), and C&A processes.
• Hands-on experience with endpoint detection and response (EDR) tools, SIEM platforms, and vulnerability management systems.
• Experience preparing technical documentation and presenting remediation strategies to federal leadership.
  
  

Benefits

Expression offers highly competitive salaries, performance-based incentives, and additional benefits, such as:

• 401k matching
• PPO and HDHP medical/dental/vision insurance
• Education reimbursement up to $10,000/yr
• Complimentary life insurance
• Generous rollover PTO and 11 days of holiday leave
• Onsite gym facility at our HQ office in Washington DC
• Commuter Benefits Plan
• In-office Cold Brew Coffee
  
  

About Expression

Founded in 1997 and headquartered in Washington, DC, Expression provides data fusion, data analytics, AI/ML, software engineering, information technology, and electromagnetic spectrum management solutions to the U.S. Department of Defense, Department of State, and national security community.

Our culture emphasizes creating immediate and sustainable value for our clients through agile delivery of tailored solutions and constant engagement. We were ranked #1 on the Washington Technology Fast 50 list of fastest-growing small business Government contractors and recognized as a Top 20 Big Data Solutions Provider by CIO Review.

At Expression, we ensure every team member has the tools and opportunities to grow while working with the newest technologies in the industry. We celebrate milestones, accomplishments, promotions, and collaborative achievements that make our workplace engaging and rewarding.

Equal Employment Opportunity Statement

Expression is an Equal Opportunity Employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.