Senior Cybersecurity Engineer

Redhorse; Chantilly (VA); On-site; USD 120,000 - 150,000; Full time

Job summary

Medium is seeking a Senior Cybersecurity Engineer in Chantilly, Virginia. This role focuses on securing mission-critical infrastructures and cloud environments to ensure data resilience against evolving threats.

The ideal candidate will have over 10 years of experience in cybersecurity engineering, an active TS/SCI clearance, and proficiency in AWS and Azure security. Strong communication skills and the ability to brief technical risks to various stakeholders are essential for success.

Qualifications

• Active TS/SCI security clearance.
• 10+ years of experience in cybersecurity engineering.
• Hands-on experience with penetration testing tools.

Responsibilities

• Secure diverse IT infrastructures across networks and applications.
• Manage storage and monitoring solutions in cloud environments.
• Communicate technical risks to stakeholders.

Skills

Cloud environment security

Cybersecurity engineering

Risk Management Framework (RMF)

Penetration testing

Network boundary protection

Education

Advanced degree in Cybersecurity or related field

Tools

AWS

Azure

Splunk

ELK stack

Job description

About the Role

Redhorse transforms the way government uses data and technology. To support this mission, we are seeking a Senior Cybersecurity Engineer to protect and defend critical enterprise and mission IT infrastructures. In this role, you will be at the forefront of securing complex, multi‑classification architectures, ensuring that the data and technology powering our nation's most sensitive missions remain resilient against evolving threats. You will have a direct impact on the security posture of cloud environments and classified enclaves, bridging the gap between high‑level policy and technical implementation.

Key Responsibilities

• Secure enterprise and mission IT infrastructures across diverse operating systems, networks, and web/database applications.
• Manage and harden storage, boundary/perimeter devices, and logging/monitoring solutions within cloud environments (e.g., C2S) and classified enclaves.
• Implement policy-based protections for data flows and network boundaries across complex, multi‑classification architectures.
• Support security certification and accreditation activities (RMF) and lead the development of required security documentation.
• Perform ad‑hoc penetration testing, formal red/blue team exercises, and compliance assessments of classified Federal systems.
• Identify innovative protection strategies that align with budget and infrastructure constraints.
• Communicate and brief technical risks and mitigation options to both technical and non‑technical stakeholders.
• Prioritize and coordinate cybersecurity workflows in fast‑paced, high‑stakes environments.

Required Experience / Clearance

• Active TS/SCI security clearance.
• 10+ years of experience in cybersecurity engineering or information assurance.
• Proven experience securing cloud environments (AWS/C2S/Azure) and classified enclaves.
• Demonstrated expertise in network boundary protection and policy‑based data flow implementation.
• Experience with the Risk Management Framework (RMF) and the security accreditation process.
• Hands‑on experience with penetration testing tools and red/blue team methodologies.
• Must possess and maintain relevant cybersecurity professional certification(s) (e.g., CISSP, CEH, Security+, or equivalent DoD 8140/8570.01‑M certification).

Desired Experience

• Familiarity with DataBricks, GitLab, or Jira for managing security workflows.
• Experience with advanced logging and monitoring solutions like Splunk or ELK stack.
• Knowledge of Spark or other big data technologies within a secure environment.
• Advanced degree in Cybersecurity, Computer Science, or a related technical field.
• Previous experience supporting Intelligence Community (IC) or Department of Defense (DoD) customers.

Redhorse Corporation is an equal‑opportunity employer. All qualified applicants will receive consideration for employment and will not be discriminated against on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin, veteran status, disability, or any other protected class.