Development of customer-oriented software solutions for ESTW and ETCS. Creation of precise system concepts and comprehensive documentation. Conducting e ective functional tests and error analysis. Acting as a technical interface for clients, planners, and inspectors.

2nd and 3rd level support for critical IT systems. Fault analysis and issue resolution to minimize downtime. Administration of Windows and Linux systems as well as network infrastructures. Coordinated on-site technicians for replacement and repair of hardware components (switches, PCs, and other IT equipment). Managed direct communication with clients, assessing their needs and ensuring timely resolution of technical issues. Oversaw logistics and deployment of new equipment to replace defective systems. Ensured customer satisfaction by troubleshooting and resolving hardware issues in a fast- paced environment. Emergency Control System Service

Technical support and maintenance of security-critical IT systems. Optimization of system configurations to improve service quality. Participation in the 24/7 hotline service. IT 2nd Level Onsite Support

Onsite technical contact point. Technical support and documentation of IT requests. Installation, configuration, and maintenance of clients, servers, and network infrastructures. Led a team of 4 IT support specialists, overseeing daily operations and technical troubleshooting. Provided guidance and mentorship to team members, improving overall support e iciency. Developed processes to enhance response times and customer satisfaction. Managed high-priority incidents, ensuring swift problem resolution.

Telecommunications Engineer