Senior Application Manager

IT Consultant – Application Management (m/f/d) | Defence Sector | Remote | Long-term Contract

Our client is a leading defence-sector IT service provider in Germany, supporting mission-critical logistics and procurement systems within a highly secure and complex environment. They are seeking a freelance IT Consultant to support the application management of existing systems, ensuring stability, performance, and continuous improvement across interconnected legacy and modern platforms.

Project Details:

Duration: June 2026 – December 2028

Workload: 5 days per week (full-time)

Location: Remote (90%) | Bonn (10%)

Responsibilities:

• Support and maintain existing applications within a complex logistics and procurement system landscape.
• Analyze business requirements and implement changes within legacy and web-based systems.
• Manage incidents, problems, and changes in line with ITIL-based service management processes.
• Monitor and control batch processing, data flows, and system interfaces.
• Ensure data consistency and oversee data transfers between internal systems and external interfaces, including SAP.
• Perform error analysis, bug fixing, and continuous system optimization.
• Conduct testing, quality assurance, and validation of implemented changes.
• Work with mainframe-based environments (z/OS) and associated development and scripting tools.
• Collaborate with stakeholders to ensure smooth operation of mission-critical applications.
• Maintain documentation and support ongoing system improvements in a regulated environment.

Requirements:

• Proven experience in Application Management or IT Operations within complex system landscapes.
• Strong expertise in IBM mainframe environments (z/OS, PL/I, JCL, REXX, ISPF).
• Experience with relational databases (DB2) and SQL-based data analysis.
• Knowledge of SAP interfaces and integration with non-SAP systems.
• Hands-on experience with ITIL-based service management tools (e.g. Maximo).
• Experience with web technologies such as PHP, JavaScript, HTML, and Apache.
• Background in managing interfaces and data flows across multiple systems.
• Experience in logistics environments, ideally within defence or similar regulated sectors.
• ITIL Foundation and Scrum Master certification required.
• Fluent German and good English language skills.