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, motivating atmosphere geared towards long-term business growth. As a member of our team, you will benefit from: a comprehensive group insurance and RRSP plan

a flextime policy with paid overtime

discretionary bonuses

a fitness reimbursement program

other office perks such as catered weekly lunches and free hot beverages (espresso, coffee, hot chocolate and tea)

regular company outings

Career Opportunity and Primary Roles / Responsibilities

We are seeking an experienced

Electrical Power System Engineer

to support the concept, detailed design, analysis, verification, and integration of electrical power subsystems (solar arrays, power-conditioning units, batteries, distribution, and regulation) for current and next-generation remote sensing and communications satellites. The role works closely with payload, bus, thermal, structural, and mission systems multidisciplinary teams responsible for delivering high-performance, reliable EPS solutions to commercial, government, and defense customers. Tasks summary:

Architecture Concept & Requirements

Define EPS architecture (generation, storage, and distribution) that satisfies mission power budget, mass, volume,



and reliability constraints.

Perform trade studies (e.g., solar cell type, battery chemistry, regulator topology).

Generate system requirements and functional flow block diagrams.

Develop Interface Control Documents (ICDs) and Design Descriptions.

Perform requirements management and maintain bidirectional traceability throughout the program lifecycle.

Detailed Design & Analysis

Size solar arrays, power-conditioning units, battery packs, and power distribution units.

Build and validate high-fidelity electrical models for satellite operating modes, FMECA, fault detection, and related analyses.

Conduct and maintain power budget models, load-flow analyses, thermal-power coupling assessments, and survivability analyses (e.g., eclipse, safe mode, fault-tolerant operations).

Cross-Functional Coordination, Stakeholder & Program Interaction

Present technical status, risk analyses, and trade-study results to program stakeholders and senior management.

Interface with spacecraft bus teams including power, thermal, structure, and avionics disciplines.

Develop and maintain high-fidelity power models for mission analysis activities such as orbit raising, station-keeping, and de-orbiting.

Develop tools to improve satellite power efficiency and optimization.

Support B&P; activities (Phase 0 & Pre-Phase A).





Integration & Verification (IVV)

Author verification plans, test matrices, and validation procedures for unit and EPS subsystem testing.

Support ground-test and integration campaigns, including fueling activities, thermal vacuum testing, EMI/EMC testing, and spacecraft-level integration.

Analyze test data, resolve anomalies, and update design baselines.

Support Flight Software (FSW) integration activities.

Technical Leadership & Mentorship

Mentor, guide, and support junior and intermediate system engineers and interns.

Act as a technical liaison with customers, partners, and external suppliers.

Participate in continuous improvement initiatives.

Contribute to knowledge-sharing activities, process enhancements, and standards development.

Configuration, Documentation & Standards Management

Maintain design and safety standards.

Ensure all artefacts, analyses, software, documentation, and deliverables are maintained under configuration control within the PLM setting.

Support design reviews (SRR, PDR, CDR, MRR/TRR, etc).

Support technology roadmaps and innovation initiatives.

Launch-Site, On-Orbit & Operations Support

Support launch-site interface checklists with launch vehicle integration teams, pre-launch checkout procedures, and early-orbit checkout activities.

Provide real-time engineering support during launch, on-orbit commissioning, anomaly investigations, and contingency operations.

Support SOOH development and associated operator training.

Required Qualifications:

B.Sc in Electrical Engineering, Aerospace Engineering, Physics, or a related field with 8+ years of EPS system de

📌 Satellite Electrical Power System (St-Laurent)
🏢 Mannarino Systems and Software
📍 St-Laurent