[Skip to main content](#main-content) [ OpenNash ](https://opennash.com/) / [Jobs](https://jobs.opennash.com/) [ 01 Search jobs](https://jobs.opennash.com/search/)[ 02 Companies](https://jobs.opennash.com/explore/)[ 03 Hiring report](https://jobs.opennash.com/reports/hiring/)[ 04 AI assistants](https://jobs.opennash.com/connect/)[ 05 How it works](https://jobs.opennash.com/methodology/) ENGIE · Brussel, Belgium # Flex Portfolio Manager Brussel, Belgium Manager or lead Executive & Management Listed on ENGIE ’s official careers site. Listed as of November 8, 2026. Check that it is still open and apply there. [Apply on ENGIE ’s careers site →](https://jobs.engie.com/job/Flex-Portfolio-Manager/72691-en_US) [OpenNash Jobs](https://jobs.opennash.com/) / [ENGIE ](https://jobs.opennash.com/companies/engie/) / Flex Portfolio Manager ## Job description ### Decentralized Flexibility Operations Manager (F/M/X) 📍 Location Brussels Are you interested in the growing world of decentralized flexibility and energy markets? Do you enjoy combining operational excellence, data management and technology to ensure flexible energy assets perform at their best? Would you like to work at the crossroads of trading, asset operations, IT and the energy transition? Then this job is for YOU. For ENGIE Supply & Energy Management, we are currently looking for a Decentralized Flexibility Operations Manager (F/M/X) based in Brussels. YOUR RESPONSIBILITIES as Decentralized Flexibility Operations Manager As Decentralized Flexibility Operations Manager, you will ensure the smooth operation of decentralized flexibility contracts and assets across Northwestern Europe, from their initial setup to real-time operations and settlement. Your main responsibilities will include: Manage the operational setup of decentralized flexibility contracts and portfolios, ensuring their accurate representation in our systems and compliance with TSO/DSO and regulatory requirements. Own the end-to-end data flows supporting trading, real-time operations and settlement, ensuring data availability, consistency and quality. Manage asset qualification and certification processes for ancillary services and capacity mechanisms, including aFRR and CRM, while monitoring asset performance. Design and monitor operational processes in collaboration with Structuring and Trading teams, ensuring contracts and assets can be efficiently operated in real time. Drive continuous improvement and automation by identifying operational inefficiencies, defining IT requirements and testing new solutions and system developments. Coordinate with asset owners, TSOs/DSOs, technical providers and internal teams such as Trading, Dispatch, Origination, Finance and IT to ensure operational excellence and resolve issues when they occur. ### Please note the position may include on-call duty shifts to support real-time operations and asset activations. YOUR PROFILE as Decentralized Flexibility Operations Manager You hold a Bachelor's or Master's degree in Engineering, Computer Science, Finance, Business Analytics or another relevant field. You have experience in a data-intensive operational environment, ideally within energy trading, renewables, flexibility or financial markets. You have strong analytical skills and attention to detail, with the ability to manage complex operational processes and ensure high data quality. You have proven Python programming skills and an interest in automation, data management and trading or operational systems. You are proactive, solution-oriented and resilient, comfortable making decisions and solving problems in a fast-paced environment. You are a collaborative team player with strong communication skills and are fluent in English and French; knowledge of Dutch or German is a strong asset. WHY JOIN THIS TEAM? Decentralized flexibility is becoming increasingly important as renewable generation, batteries and flexible assets play a growing role in the electricity system. In this position, you will work directly at the intersection of energy markets, flexibility, data and operations, with tangible impact on how decentralized assets are integrated and operated. You will have the opportunity to: Develop expertise in decentralized flexibility and ancillary services. Work closely with trading and structuring teams as well as asset owners and system operators. Contribute directly to the operational integration of flexible assets. Take ownership of critical operational and data processes. Drive automation and IT improvements. Work in a dynamic and highly cross-functional environment. MORE ### ABOUT US ENGIE Supply & Energy Management (S&EM) is the energy management business unit of ENGIE and plays a key role in delivering reliable, affordable and low-carbon energy solutions worldwide. By joining S&EM, you become part of a global community of more than 10,000 energy professionals across 20 countries, working together to accelerate the energy transition and provide decarbonized energy 24/7. Our teams combine energy market expertise, technology and operational excellence to optimize ENGIE's assets and support the development of increasingly flexible and decentralized energy systems. At S&EM, we encourage innovation, collaboration, entrepreneurship and continuous learning while fostering an inclusive working environment where everyone can thrive. ## At a glance - Posted by the employer: Not stated - First seen by OpenNash: Oct 25, 2026 - Last checked: Nov 8, 2026 - Listed for: 14 days - Location: Brussel, Belgium[Apply on ENGIE ’s careers site →](https://jobs.engie.com/job/Flex-Portfolio-Manager/72691-en_US) ## Hiring at ENGIE - Open jobs: 684 - New in the last 7 days: 70 - Tracked since: Jul 31, 2026 [All ENGIE jobs](https://jobs.opennash.com/companies/engie/) · [Weekly hiring report](/reports/hiring/) ## More jobs at ENGIE ### [Quantitative Risk Analyst](https://jobs.opennash.com/companies/engie/jobs/3d554d9f8df1ec6e8f71/) Brussel, Belgium ### [Group Manager](https://jobs.opennash.com/companies/engie/jobs/bd5862a2995857235916/) Brussel, Belgium ### [Internship: Internal Communication](https://jobs.opennash.com/companies/engie/jobs/3e4b40a7d4371c3a82c8/) Brussel, Belgium ### [Lead Engineer - Civil Engineering - Bridges and Tunnels](https://jobs.opennash.com/companies/engie/jobs/e6ba6b872f260e4a5c79/) Brussel, Belgium ### [Lead engineer I&C](https://jobs.opennash.com/companies/engie/jobs/75ff502d5fc72149de8f/) Brussel, Belgium ## Similar jobs at other companies ### [Flex Driver](https://jobs.opennash.com/companies/fedex/jobs/2e01ae088f28925f4375/) FedEx ### [FLEX Sales Executive](https://jobs.opennash.com/companies/marriott-international/jobs/347a979d6a9d8f357bf4/) Marriott International ### [Flex Production Labourer](https://jobs.opennash.com/companies/cargill/jobs/ec70d83dd4f7f2233fb8/) Cargill · Spruce Grove, Canada ### [FLEX OSR Sous Chef](https://jobs.opennash.com/companies/marriott-international/jobs/9aaa9a7670e8ed26ce60/) Marriott International ### [Schichtführer*in Flex (m/w/d)](https://jobs.opennash.com/companies/deutsche-post/jobs/dbac97ee0f201e161f15/) Deutsche Post · Köln, Nordrhein-Westfalen, Germany [Executive & Management jobs](/functions/executive-management/) OpenNash lists jobs from employers’ own careers sites and does not handle applications. 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