Satcom Security Architect

Job Introduction

Serco is a leading Space Services Provider with thousands of skilled resources that has supported over 50 space missions on behalf of more than 10 Space or Government agencies around the globe, including the ESA and NASA. Serco offers space capability across the full space lifecycle from satellite testing to Launch services, LEOP to spacecraft operations, space surveillance to data management, and supporting downstream application development.

With this in mind, we are seeking a European-based Satcom Security Architect who supports ESA on defining, integrating, and sustaining the end‑to‑end security architecture of satellite communication systems across space, ground, and user segments.

You would ensure that cybersecurity and information assurance requirements are addressed by design, translating mission, regulatory, and risk‑based security needs into coherent technical architectures covering networks, platforms, applications, and data flows. Acting as a key interface between system engineering, operations, and security governance, you would assess threats and vulnerabilities specific to satcom environments, define proportionate protection measures, and support their implementation throughout the system lifecycle, from design and validation to operations and incident handling, while ensuring continued compliance with applicable space and cybersecurity standards.

At Serco, we do not only offer a career but also the opportunity to join a community where everyone’s wellbeing matters, by living out the Serco values in all we do!

Main Responsibilities

• Provide security engineering support at system and subsystem level for SATCOM solutions.
• Follow up and review the security architecture definition for space and ground assets involved in services relying on 5G stack protocols.
• Follow and assess interface definitions, ensuring that security aspects are properly addressed across segments.
• Follow accreditation activities of the 5G protocol stack and propose security trade‑offs where required.
• Provide support and guidance to the industrial consortium on ad‑hoc security certification aspects, including Common Criteria (CC), Controlled Distribution Environment (CDE), and TEMPEST.
• Follow 3GPP security standards and ensure compliance of the proposed solution with applicable security requirements.
• Contribute to requirements engineering and consolidation related to security architecture.
• Contribute to the definition of functional and physical security architecture across the SATCOM system.
• Perform design trade‑off analyses with a focus on security aspects.
• Perform technical security risk assessments and contribute to mitigation strategies.
• Prepare work items related to security aspects for 3GPP or other standardization bodies, such as NATO or STANAG.
• Support industrial milestone reviews, including preliminary, critical design, qualification, in‑orbit validation, and service declaration reviews, with a focus on security aspects.
• Perform technical assessment of security‑related industrial deliverables.
• Prepare review comments and Review Item Discrepancies related to security architecture, accreditation, and compliance.
• Produce security‑related technical notes, trade‑off reports, and contributions to accreditation dossiers

Successful Candidate

• Ability to define and justify end‑to‑end security architectures covering space, ground, and user segments.
• Capability to translate mission, regulatory, and risk‑based security needs into coherent technical solutions.
• Strong applied knowledge of 3GPP security and its use in non‑terrestrial and satcom environments.
• Proven experience supporting security accreditation, certification, and compliance activities.
• Competence in security requirements engineering, consolidation, and cross‑segment traceability.
• Capability to analyse interfaces and ensure consistent security implementation across system boundaries.
• Experience performing security‑driven trade‑offs and technical risk assessments with clear mitigation strategies.
• Ability to assess industrial security deliverables and support milestone reviews with actionable feedback.
• Production of clear, structured security documentation, including technical notes, trade‑offs, and risk analyses.
• Strong communication skills to effectively bridge system engineering, operations, industry, and security governance.

Technical

• Work experience in the Space domain will be an asset
• MSc, or equivalent qualification, in a relevant technical or scientific discipline will be an asset
• Need to be EU national and eligible to obtain EU Personal Security Clearance.

Personality

• Effective management of self with track record of involvement in change in complex and demanding environments, interacting with individuals at all levels of the organization
• Methodical and proactive, with initiative and capability to work autonomously
• Problem-solving and creativity-oriented attitude
• ⁠Excellent communication skills, including relationship development and stakeholder management;