L3 Network and Security Design Expert

Job Description L3 Network and Security Design Expert Posting Start Date: 8/12/26 Requisition ID: 67449 Apply now Informations générales BUCURESTI, Romania, 040215 ENGIE GBS ROMANIA SRL Digital / IT / Data Permanent Full - Time At ENGIE, we are building the infrastructure that powers a sustainable future. Our networks connect people, systems, and ideas across continents. As a Network & Security Design Expert, you will shape the backbone of our digital transformation, ensuring secure and resilient connectivity from data centers to the cloud. Within our Network & Cybersecurity Services division, the Network And Connectivity team tackles complex challenges every day. We need your expertise to translate business needs into robust technical solutions. Your work will directly protect and enable operations across the entire ENGIE group. What You'll Do - Design firewall, proxy, and load balancing solutions aligned with business requirements and current design standards. - Produce Low Level Design documents and contribute to High Level Design in close cooperation with architects. - Deploy network and security solutions into production environments in a controlled, structured manner. - Perform complete handover to operational teams, including documentation, test plans, and migration plans. - Provide Level 3 expertise support for complex or critical incidents on proxy, load balancing, and firewall infrastructure. - Conduct end-to-end performance troubleshooting on network performance degradations. - Continuously analyze and optimize existing network infrastructure, tools, and documentation. What You Bring - Advanced expertise on Zscaler solutions, Palo Alto and Fortinet firewalls, and F5 load balancers. - Strong knowledge of LAN, WAN, TCP/IP, virtualized architectures, VLANs, and VRF concepts. - Experience with AWS and Azure cloud environments, including network and cybersecurity cloud concepts. - Proven ability to write HLD/LLD documents, migration plans, and technical documentation using Microsoft Visio. - Excellent analytical and TCP troubleshooting skills with a structured approach to problem-solving. - Good communication in English (speaking and writing) and French (speaking); Dutch is a plus. - Team-oriented mindset with the ability to work autonomously, take initiative, and guide stakeholders through projects. Location Bucharest, Romania. This is a hybrid role combining remote work and on-site presence. Occasional travel may be required. On-duty services are expected approximately one week every two months. What We Offer - A competitive salary package with clear career progression within a global energy leader. - A diverse range of missions spanning on-premise data centers, cloud environments, and cutting-edge security platforms. - A friendly, collaborative work environment where open communication and mutual support are the norm. - Flexibility and work-life balance through our hybrid working model. - Opportunities for continuous learning, certifications, and professional development in network and cybersecurity. Only candidates selected for interviews will be contacted. If you decide to send us your personal information in order to apply for this position, please be aware of our job candidate GDPR Data Privacy Notice: https://www.engie.ro/wp-content/uploads/2022/09/ER_Nota-de-informare-Candidati.pdf . Our Commitment At ENGIE, every talent has a role to play in accelerating the energy transition. Make a difference and enjoy a fulfilling professional experience. Take on exciting challenges and build a career path that reflects who you are. Join us and be part of the adventure of the century! ENGIE is an equal opportunity employer. We evaluate all applicants based on their skills, experience, and potential. We do not discriminate based on gender, ethnicity, age, disability, sexual orientation, religion, or any other protected characteristic. We are committed to creating a diverse and inclusive workplace where everyone belongs. If you require any reasonable accommodation during the recruitment process, please let us know. We will work with you to ensure an accessible and supportive experience. Business Unit: GBS Division: GBS BS - IT Legal Entity: ENGIE GBS ROMANIA SRL Company Name: ENGIE GBS Romania Minimum Base Salary: Maximum Base Salary: Pay Basis: Nos valeurs L’inclusion et la diversité sont au cœur de notre politique de ressources humaines. Nous assurons l'égalité des chances entre tous les candidats et sommes engagés à créer l’environnement de travail le plus accessible possible. Information at a Glance Apply now Le groupe ENGIE À propos d’ENGIE