Job Description

Cyber Security Engineer

Location: Reston, VA, US

At SES Space & Defense, we are a trusted partner ensuring mission success for customers operating in the most demanding environments. As part of SES S.A., a global leader in satellite-enabled connectivity, we deliver multi-orbit, end-to-end satellite and technology solutions that provide secure, reliable, and high-bandwidth communications across the globe. With more than 120 satellites covering nearly the entire world, a global ground network, and thousands of deployed terminals supporting over 5,000 government missions annually, SES Space and Defense is a trusted partner to the U.S. Federal Government and national security community, allied governments, NATO, and agencies including NASA for mission-critical communications.

The Cyber Security Engineer will serve as a key member of SES Space & Defense's growing Cyber Organization, supporting program cybersecurity initiatives across mission-critical government and satellite communications environments. This role is responsible for helping ensure systems remain compliant, resilient, and ready to meet evolving customer and regulatory requirements throughout the program lifecycle. The successful candidate will provide hands-on support across cybersecurity engineering, vulnerability management, continuous monitoring, and certification activities while partnering closely with program managers, systems engineers, and operational teams. Acting as a trusted technical resource, this individual will help integrate security into system design, implementation, and sustainment efforts from the earliest stages of development. This position offers broad exposure to cybersecurity practices supporting space, ground, and enterprise environments while contributing directly to the protection of critical national security capabilities.

Ensure system compliance within the Cybersecurity Maturity Model Certification (CMMC) framework and associated policies, procedures, and guidelines

Provide hands-on cybersecurity support, guidance, and quality assurance for projects, programs, and team members

Serve as a Subject Matter Expert (SME) on system certification and authorization activities

Review customer-required security plans, including CONOPS, OPSEC documentation, standard practices, and operating procedures

Interface with Program Management to ensure compliance with established security plans and customer directives

Review, prepare, and maintain CMMC packages in accordance with NIST 800-171 and customer requirements

Identify and communicate changes that may affect Information System security authorization status

Perform self-inspections and investigations as required by government regulations

Participate in customer audits and inspections

Manage vulnerability and patching activities, providing regular status updates to program leadership

Develop, revise, and maintain Plan of Action and Milestones (POA&M) documentation

Coordinate patching and hardening efforts to align with operational schedules and program requirements

Develop and maintain continuous monitoring plans, including schedules, frequencies, and resource planning

Participate as a member of the Change Control Board (CCB) to support timely approval of change and configuration activities

Develop and maintain system information security policies and procedures

Prepare internal and external customer reports in a timely manner

Maintain technical expertise through professional development, industry engagement, and continuing education

Support hardening activities, site visits, and validation efforts across operational facilities, NOCs, and satellite access centers

Bachelor's degree in Computer Science or a related technical discipline

2–4 years of experience in Information Assurance, Cybersecurity Systems, Vulnerability Management, Systems Auditing, Information Systems, Engineering Management, or Security Test and Evaluation

U.S. Citizenship with the ability to obtain and maintain a DoD Secret security clearance

Experience conducting Information System vulnerability scanning

Experience serving as an Information Systems Security Officer (ISSO)

Ability to work effectively in dynamic environments with DoD, military, civilian, and industry stakeholders

Ability to work independently and within cross-functional teams

Strong written and verbal communication skills, including the ability to brief senior leaders and executive staff

Active DoD security clearance at the Secret level or higher preferred

Familiarity with Tenable Nessus, SCTM, SCAP, and eMASS preferred

Military satellite communications experience preferred

SES Space and Defense is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability, protected veteran status, age, or any other characteristic protected by applicable law.

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