MANNARINO Systems & Software Inc. is a leader in providing safety-critical systems, software, hardware and certification engineering services to the aerospace, defense, space, simulation & power generation industries. Our customer base is very large, covering traditional aerospace companies as well as new and exciting markets, including electric propulsion, Urban Air Mobility, Unmanned Aerial Vehicle and autonomous flight. The MANNARINO culture is focused on high quality, hard work, professionalism and teamwork within a highly respectful, engaging atmosphere geared towards long-term business growth. a flextime policy with paid overtime discretionary bonuses other office perks such as catered weekly lunches and free hot beverages (espresso, coffee, hot chocolate and tea) We are seeking a Satellite C&DH; System Engineer to support the design, integration, verification, and operation of onboard command, control, and data management functions for current and next-generation remote sensing and communications satellite programs.

The successful candidate will be responsible for the C&DH; functional architecture, lead trade studies, and provide technical leadership throughout the spacecraft lifecycle.

Produce System

Requirements, Interface Control Documents (ICDs), and System Description Documents. Perform requirements management and maintain bidirectional traceability throughout the project lifecycle. Lead the detailed design of onboard processors, data buses (SpaceWire, MIL-1553, CAN, Ethernet), memory subsystems, and I/O interfaces.

Support software architecture activities including command sequencing, telemetry packetization, health monitoring, onboard services, and fault detection,



isolation and recovery (FDIR).

Support Satellite Reference

Database development and validation. Communicate technical status, risk assessments, and trade study results to stakeholders, customers, and partners. Collaborate with Flight Software teams to define RTOS configuration, APIs, task scheduling, and service utilization.

Define uplink command formatting, downlink telemetry packet structures, and ground segment data-handling interfaces. Coordinate with TT&C;/PDT and Ground Segment teams to ensure end-to-end data integrity. Support proposal and early-phase project activities (Phase 0 and Pre-Phase A).

Develop verification plans, test matrices, and validation procedures for unit, subsystem, and spacecraft-level C&DH; testing. Execute functional testing, bus protocol compliance testing, SIL and HIL validation campaigns. Lead anomaly investigations, root cause analysis, and corrective action implementation.

Technical

Leadership & Mentorship Act as a technical liaison with customers, partners, and external suppliers. Participate in continuous improvement initiatives. Contribute to engineering standards, knowledge sharing, and process improvement activities.

Configuration, Documentation & Standards Management Develop and maintain C&DH; standards, including bus protocols, data format conventions,



and redundancy policies. Ensure all engineering artefacts, analyses, and documentation are maintained under configuration control within the PLM environment. Validate satellite functionality, housekeeping telemetry, and nominal operations.

Support the analysis of on-orbit telemetry and update system parameters as required. Support operations concept development and operator training activities. Bachelor's degree in Electrical Engineering, Aerospace Engineering, or a related field.

Minimum 8 years of C&DH; engineering experience on LEO, MEO, and/or GEO satellite platforms. In-depth knowledge of spacecraft data bus standards including SpaceWire, MIL-1553, CAN, Ethernet, CCSDS telemetry and telecommand protocols, and PUS services. Strong understanding of aerospace systems engineering fundamentals, the space environment, and orbital mechanics.

Hands-on experience supporting system integration, testing, troubleshooting, and problem resolution. Demonstrated ability to work effectively with minimal supervision. Strong analytical and problem-solving skills with the ability to simplify complex technical challenges and develop practical solutions.

Excellent written and verbal communication skills in English. Knowledge of French is considered an asset. Knowledge of English is required to communicate and work with customers outside the province of Quebec. / La connaissance de l'anglais est requise pour communiquer et travailler avec nos clients situés à l'extérieur de la province de Québec.

Diversity of thought and experiences leads to innovative solutions and creativity.

📌 Satellite Command & Data‑Handling (C&DH) System Engineer (Saint-Laurent)
🏢 Mannarino Systems and Software
📍 Saint-Laurent