RF Architect

SII Group delivers Digital Services, IT, Engineering, and Consulting to diverse industries, enabling digital transformation through our commitment to Growth, People, and CSR.

With over 16,000 professionals across 21 countries, we’re recognised as a “Great Place to Work” for fostering a high-trust culture. Our core values of Trust, Commitment, Accountability, Passion, Creativity, and Transparency drive our work package delivery, ensuring we meet and exceed client expectations as a committed partner.

Since 2016, SII UK has supported top Aerospace & Defence, Aviation, Transportation, and Finance clients, empowering digital transformation with industry-leading engineering expertise.

Let’s Tech Together is our promise to encourage innovation and teamwork. We support our engineers with development opportunities and a collaborative, inclusive environment where every voice is valued and empowered.

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KEY RESPONSIBILITIES:

• Lead RF architecture definition and trade-off analysis for spaceborne or high-reliability communication systems.
• Define system-level RF requirements, budgets, and interface control documents (ICDs).
• Oversee RF system modelling, simulation, and link budget analysis.
• Work closely with hardware teams on the design and verification of RF subsystems including filters, LNAs, PAs, frequency converters, and antennas.
• Support design reviews, technical documentation, and customer engagement activities.
• Ensure compliance with relevant industry standards and project requirements, including radiation tolerance and space qualification constraints.
• Provide technical guidance to junior engineers and interface with multidisciplinary teams including systems, digital, and mechanical design.

EXPERIENCE AND SKILLS:

• Proven experience as an RF or Microwave Architect or Lead Engineer in aerospace, defence, or satellite communications.
• Strong knowledge of RF system design including link budgets, noise analysis, linearity, and frequency planning.
• Experience with RF simulation tools such as Keysight ADS, CST, HFSS, or similar.
• Familiarity with high-frequency design (L to Ka bands), EMC/EMI considerations, and thermal constraints in space environments.
• Hands-on experience with RF test and measurement equipment (e.g., VNAs, spectrum analysers, power meters).
• Solid understanding of relevant standards (e.g., ECSS, MIL-STD, ITU, ESA).
• Strong communication and documentation skills; able to convey technical concepts to stakeholders.
• Background in satellite payloads or ground segment RF systems.
• Experience with digital/RF co-design or SDR-based architectures.
• Knowledge of FPGA interface and control in RF subsystems.
• Experience working in international and multi-site teams.

BENEFITS:

• Competitive Basic Salary
• 6% Employers Contribution + 6% as a salary sacrifice
• Private Medical Insurance, Life Cover and Income Protection
• 25 days holiday
• 5 days full sick pay per year
• Cycle to Work & TechScheme
• Corporate access to the Udemy platform

* If you\’re applying for a role requiring security clearance, please be aware that foreign or dual nationality is not an automatic bar, however certain posts may have restrictions which could affect those who do not have sole British nationality or who have personal connections with certain countries outside the UK.

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