Christian Tchouta Yonbang
Client Manager
Experience
Client Manager
BSI Deutschland Group GmbH
- Carrying out external audits regarding ISO 9001, ISO 27001, ISO 27017, ISO 27018, ISO 22301, WLA-SCS, HDH.
Support Manager
SOFTWARE AG
Managed and maintained ALFABET software incidents and ensured their continuous improvement.
Analyzed customer difficulties and incidents in on-premise and cloud environments.
Configured environments and recorded incidents as bugs or change requests for future releases or hotfixes.
OSH Management Representative
Sthree GmbH
Supported Thyssenkrupp Industrial Solutions in migrating occupational health and safety management systems from OHSAS 18001 to ISO 45001.
Retained certification matrix with subsidiaries in South Africa, Germany, China, India and Italy.
Software Tester
T-Systems Multimedia Solutions
Digitalized toll procedures for Toll Collect GmbH.
Implemented a system where truck drivers specify cargo contents and distance traveled on German motorways using magnetic cards.
Test and Quality Manager
T-Systems Multimedia Solutions
- Managed VPN solutions for NGENA GmbH, providing integrated, automated, flexible connectivity services worldwide via a global cloud platform.
External Auditor / Trainer
3 Cert GmbH
Carried out external audits related to ISO 9001:2015.
Recommended issuance of customer certificates after audits.
Test and Quality Manager
T-Systems Multimedia Solutions
- Oversaw quality assurance and testing processes (details unspecified).
Quality and Information Security Manager
T-Systems Multimedia Solutions
Migrated SAP systems of SCHOTT AG to a new data center without affecting operations.
Ensured data security during transfer.
Test and Quality Manager
Viessmann IT Service GmbH
Established policy and strategy for software quality across the Viessmann Group.
Continuously improved quality assurance processes and documentation.
Conducted internal audits of quality management system processes.
Graduate Student
IT-Systemhaus evosoft GmbH
Performed vulnerability analysis of quality management system based on ISO 9001:2008 for Siemens.
Presented recommendations for improvements.
Test Engineer
Landesbank Berlin AG
Created specifications and structured tests for banking software.
Reviewed and validated implemented software.
Analyzed test results.
Working Student
Siemens AG
Analyzed and optimized business processes.
Created process documentation.
Developed specifications in requirements management.
Evaluated processes and implemented improvements.
Industries Experience
See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.
Experienced in Manufacturing (7 years), Professional Services (5 years), Information Technology (3 years), Banking and Finance (1 year), and Transportation (0.5 years).
Business Areas Experience
The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.
Experienced in Quality Assurance (11 years), Audit (5 years), Information Technology (3 years), Operations (1 year), and Customer Service (0.5 years).
Languages
Education
Technical University of Berlin
Diploma · Industrial Engineering · Berlin, Germany
Certifications & licenses
ECQA Certified Software System Service Process Improvement (SPI) Manager
Expert ISO 22000 – IT Service Management
Expert ISO 45001 - occupational safety management system
ISTQB Certified Test Manager Advanced Level
ISTQB Certified Tester Fondation Level
Lead Auditor ISO 22301 – Business Continuity Management System
Lead Auditor ISO 27001 – Information security management system
Lead Auditor ISO 27017 – Information security in cloud computing
Lead Auditor ISO 27018 – Protecting PII in Public Clouds
Lead Auditor ISO 9001 – Quality Management System
Lead Tutor ISO 9001 Trainings
Profile
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