Senior System Engineer, Simulation and MBSE Modelling

Telesat (Nasdaq and TSX: TSAT) is a leading global satellite operator, providing reliable and secure satellite-delivered communications solutions worldwide to broadcast, telecommunications, corporate and government customers for over 50 years. Backed by a legacy of engineering excellence, reliability and industry-leading customer service, Telesat has grown to be one of the largest and most successful global satellite operators. Telesat Lightspeed, our revolutionary Low Earth Orbit (LEO) satellite network, scheduled to begin service in 2027, will revolutionize global broadband connectivity for enterprise users by delivering a combination of high capacity, security, resiliency and affordability with ultra‑low latency and fiber‑like speeds. Telesat is headquartered in Ottawa, Canada, and has offices and facilities around the world. The company’s state‑of-the-art fleet consists of 14 GEO satellites, the Canadian payload on ViaSat‑1 and one LEO 3 demonstration satellite. For more information, follow Telesat on X and LinkedIn or visit We are seeking a motivated Senior System Engineer to join the Lightspeed System Engineering team. This position will focus on System Simulation, Analysis, and Model‑Based Systems Engineering (MBSE) using Capella to support the development of system‑level performance and architecture for a next‑generation Low Earth Orbit (LEO) satellite constellation network. The successful candidate will work alongside experienced systems engineers to capture, model, and analyze system behaviors and interfaces, directly contributing to the definition of the space, ground, and operations segments. This is a hands‑on opportunity to gain exposure to satellite communications, MBSE practices, and end‑to‑end system design in a complex, multi‑disciplinary engineering environment. Main Responsibilities Develop and maintain MBSE models in Capella, supporting the architecture of system‑level components, functional breakdowns, interfaces, data flows, and exchange scenarios. Assist in defining and documenting interfaces, use cases, and system behaviors within the system architecture. Collaborate with cross‑functional teams (RF, software, networking, platform engineering) to incorporate technical inputs into the MBSE model. Develop and maintain system simulations to predict and track system performance using tools such as MATLAB. Develop and maintain comprehensive system architecture documentation, including subsystems definitions, interfaces, and data flows, to ensure optimal performance and reliability. Participate in design reviews and working sessions, presenting model outputs and findings. Education and Experience Required A Bachelor’s or Master’s degree in Systems Engineering, Aerospace Engineering, or related technical field. 1–5 years of proven experience in satellite system architecture and design. Strong knowledge of satellite systems, orbital mechanics, communications, and systems engineering concepts (requirements, functional analysis, interfaces, V‑model). Specialized Knowledge, Skills and Abilities Experience with model‑based system engineering methods in academic or project settings. Exposure to MBSE tools (Capella, MagicDraw, Cameo, Rhapsody, etc.) – Capella experience preferred. Programming or scripting ability (e.g., Python, MATLAB) for model data processing or analysis would be considered an asset. Strong analytical and problem‑solving skills, with attention to detail. Good communication skills and ability to work in a collaborative, multi‑disciplinary environment. The successful candidate must be able to work in Canada and obtain clearance under the Canadian Controlled Goods program (CGP). #LI-MF1 At Telesat, we take pride in being an equal opportunity employer that values equality in the workplace. We are committed to providing the best candidate experience possible including any required accommodations at every stage of our interview process. All qualified applicants that have been selected for an interview that require accommodations, are advised to inform the Telesat Talent team accordingly. We will work with you to meet your needs. All accommodation information provided will be treated as confidential. #J-18808-Ljbffr