Key projects: listed here are the most important projects in which I worked. Beyond this there was a variety of smaller consulting assignments which lasted between one and 20 days.<\/p>\n
Client<\/strong>: internal<\/p>\n Technology<\/strong>: GitHub Copilot, GitHub Copilot Chat, Emacs with copilot.el, Visual Studio Code v1.93.0 with GitHub Copilot Extension, JetBrains IDEs with GitHub Copilot Integration<\/p>\n Result<\/strong>: Training and exam with award of the following certificate: Client<\/strong>: internal<\/p>\n Technology<\/strong>: HCP Terraform, Terraform Community\/CLI v1.9.5, Vault 1.17.4, Visual Studio Code v 1.93.0 mit Terraform Extension for Visual Studio Code v2.32.3<\/p>\n Result<\/strong>: Terraform training courses and exams with award of the following certificate: HashiCorp Certified: Terraform Associate (003<\/a>)<\/p>\n Holders of the HashiCorp Certified: Terraform Associate certification know the basic concepts, skills and use cases related to the open source HashiCorp Terraform. They understand Terraform and can use it according to the certification objectives. In addition, they understand why organizations choose to extend Terraform Open Source with Terraform Enterprise to meet business-critical objectives.<\/p>\n Client<\/strong>: internal<\/p>\n Technology: Amazon Web Services: various AWS services.<\/p>\n Technology<\/strong>: AWS training courses and exams with awarding of the following AWS certificates:<\/p>\n AWS Certified Solutions Architect \u2013 Professional <\/strong><\/a><\/p>\n Holders of this certification have a comprehensive understanding of how to develop technical strategies to achieve specific business objectives. They have demonstrated the ability to weigh best practices and trade-offs depending on the business context. Badge holders are able to develop solutions for multiple platforms and vendors.<\/p>\n AWS Certified Solutions Architect \u2013 Associate<\/strong><\/a><\/p>\n Holders of this certification will have a comprehensive understanding of AWS services and technologies. They will have demonstrated the ability to develop secure and robust solutions using architectural design principles based on customer requirements. Badge holders will be able to design strategically well-designed distributed systems that are scalable, resilient, efficient and fault-tolerant.<\/p>\n AWS Certified SysOps Administrator \u2013 Associate<\/strong><\/a><\/p>\n Holders of this certification will have a comprehensive understanding of the deployment, management and operation of IT systems in the AWS cloud. They will have demonstrated the ability to migrate on-premises workloads to AWS and monitor, scale and secure systems on the AWS platform. Badge holders will be able to provide guidance on implementing best practices for cloud operations.<\/p>\n AWS Certified Developer \u2013 Associate<\/strong><\/a><\/p>\n Holders of this certification will have a comprehensive understanding of the application lifecycle. They will have demonstrated proficiency in writing applications using AWS service APIs, AWS CLI and SDKs, using containers, and deploying with a CI\/CD pipeline. Badge holders will be able to develop, deploy and debug cloud-based applications that adhere to AWS best practices.<\/p>\n Planning and rebuilding of highly available Oracle Forms and Reports environments (dev, test, acceptance, production) on RHEL (Red Hat Enterprise Linux). Transfer of the configurations from the AIX-based legacy systems. Configuration of OHS (Oracle http Server) proxies. Integration of an Active Directory system, configuration of SSL. Migration, deployment and testing of several legacy applications. Conducting error analyses and providing solutions. Creation of a patch plan for all components of the Forms and Reports installation and patching of several systems.<\/p>\n Client<\/strong>: German logistics and postal company<\/p>\n Role<\/strong>: Consultant<\/p>\n Technology<\/strong>: Oracle Forms and Reports Version 12.2.1.4, Oracle HTTP Server, Python, bash, Oracle Database 19c Enterprise Edition, SVN, Git, Java 1.8.0, Oracle Weblogic Server 12.2.1.4.0<\/p>\n Result<\/strong>: Provisioning of several Oracle Forms and Reports environments until production takeover. Migration of the old applications to the new system. Creation of a patch plan and patching of all components. The live scripting method<\/a> was used for setup and documentation.<\/p>\n Planning and rebuilding of highly available Oracle Service Bus environments (dev, test, acceptance, and production) in version 12.2.1.4. Transferring the configurations from the legacy systems, security configurations for SSL, SOAP and WS-Security. Creating and deploying OSB projects. Design and creation of an OSB development environment.<\/p>\n Client<\/strong>: Public administration in Liechtenstein<\/p>\n Role<\/strong>: Consultant<\/p>\n Technology<\/strong>: Oracle Service Bus 12.2.1.4, SAML 2.0 and WS-Security with OWSM (Oracle Webservices Manager), Apache HTTP Server, Python, bash, SOAP\/REST, Jenkins Continuous Integration Server, SVN, Git, and Oracle JDeveloper.<\/p>\n Result<\/strong>: Provision of several Oracle Service Bus environments, including migration and deployment of OSB projects from the legacy systems. Provision of a development environment for OSB projects. The live-scripting method<\/a> was used for setup and documentation.<\/p>\n Development of an architecture concept and offer for the migration of a medium-sized industrial company to SAP BW\/4HANA and SAP Analytics Cloud (SAC) on AWS. Design of a highly available multi-account architecture with development, test and production environment. As part of an accompanying proof of concept, the technical feasibility of the concept was validated, in particular the integration of SAP BW\/4HANA into an AWS landing zone.<\/p>\n Client<\/strong>: Medium-sized mechanical engineering company and world market leader in its segment<\/p>\n Role<\/strong>: Cloud architect, technical consultant<\/p>\n Technology<\/strong>: AWS Landing Zone, AWS Organizations, AWS Control Tower, AWS Transit Gateway, Amazon EC2 for SAP HANA, Amazon EBS, Amazon S3, AWS Backup, AWS Systems Manager, AWS CloudWatch, AWS CloudTrail, SAP BW\/4HANA, SAP Analytics Cloud, JDBC connectors<\/p>\n Result:<\/strong> An AWS reference architecture was developed for the customer that was specifically geared towards SAP workloads and ensured a highly available infrastructure. The designed landing zone included a multi-account strategy with centralized network management. Automated maintenance and monitoring processes were designed and documented in a detailed step-by-step plan for agile implementation. The AWS cost calculation took various deployment scenarios into account and enabled precise budget planning. The focus was on the integration of SAP workloads into a secure, scalable AWS infrastructure, taking into account best practices for enterprise architectures and SAP-specific AWS certifications. <\/span><\/p>\n Development of two offer packages: „Landing Zone on AWS – Quick-Start – Consulting and Implementation“.<\/p>\n Partner<\/strong>: Amazon Partner Network<\/p>\n Role<\/strong>: Conception, implementation, test, documentation<\/p>\n Technology<\/strong>: AWS Control Tower, AWS Organizations, AWS Service Catalog, AWS Single Sign-on, AWS Config, AWS CloudFormation, Amazon CloudWatch, AWS CloudTrail, AWS Identity and Access Management, Amazon Simple Storage Service, Amazon Simple Notification Service, AWS Lambda, AWS Step Functions, AWS CodeCommit, AWS CodePipeline, Amazon Simple Queue Service, AWS Key Management Service<\/p>\n Results<\/strong>: Two service packages for hands-on entry into a secure, scalable AWS environment with multiple accounts, the foundation of a landing zone on AWS, using a pre-built PoC concept and a portfolio of different extensions, customizable to each customer’s needs.<\/p>\n Client<\/strong>: internal<\/p>\n Technology<\/strong> :Amazon Web Services: multiple AWS Services.<\/p>\n Results<\/strong>: Certification as an AWS Solutions Architect Associate. 2020 Open Source Project \u2013 Life-Scripting<\/p>\n Technology<\/strong>: Emacs 27, Org-Mode, Lisp, HTML, AWS-S3, Git-Hub<\/p>\n Results<\/strong>: Live scripting is an approach to combine work in IT projects, documentation and reuse. It involves documenting work on the command line while it is being executed (github.com\/andreaswittmann\/live-scripting<\/a>)<\/p>\n Migration of highly available Oracle Service Bus environments (dev, test, acceptance, production), version 11.1.1.9 OnPremise to version 12.2.1.3 in the AWS Cloud, automated, replicable and versioned<\/p>\n Client<\/strong>: International logistics group<\/p>\n Role<\/strong>: Conception, implementation, documentation, DevOps<\/p>\n Technology<\/strong>: Oracle Service Bus 12.2.1.3, Saltstack, WLST, Python, bash, GitLab CI\/CD, SOAP\/REST, Jira\/Confluence, AWSCloudFormation,AWSIdentityandAccessManagement, Amazon Simple Storage Service, Amazon EC2, Amazon Elastic Block Store, Amazon Elastic File System, Amazon Data Lifecycle Manager, Amazon Relational Database Service (RDS)<\/p>\n<\/div>\n<\/div>\n Results<\/strong>: Design and development of automated functional and connection tests based on GitLab CI\/CD (continuous integration\/continuous deployment). Concept and implementation of automated patch processes for EC2 instances with AWS Maintenance Window. Analysis and elimination of security vulnerabilities for EC2 environments. Preparation and support of the migration from Oracle Service Bus to the AWS Cloud.<\/p>\n<\/div>\n<\/div>\n<\/div>\n Client<\/strong>: International logistics group<\/p>\n Role<\/strong>: Conception, implementation, documentation, DevOps<\/p>\n Technology<\/strong>: Salt Stack, Core OS ETCD 3.2, Python, GIT, AWS SSM (Simple System Management), Parameter Store, Boto3 (AWS Python API), Java 7, Java 8, Weblogic Server 10 und 11, Oracle Service Bus 11\/12<\/p>\n Result<\/strong>: Design and development of a secure password management for the automatic provisioning of operating environments. Design and implementation of a multi-user development environment for Salt Stack including version control and branching model. Analysis and elimination of security vulnerabilities for various Weblogic and Oracle Service Bus environments.<\/p>\n Client<\/strong>: International logistics group<\/p>\n Role<\/strong>: Conception, implementation, documentation, DevOps<\/p>\n Technology<\/strong>: Salt Stack, Python, Java 7, Java 8, Weblogic Server 10 und 11, Oracle Service Bus 11\/12<\/p>\n Result<\/strong>: Requirement analysis and conception of a cross-platform and cross-technology monitoring system based on Elastic Search, Kibana and Grafana. Documentation for the security management of Weblogic Server and Oracle Service Bus environments. Migration of an Oracle Service Bus environment from OSB 11 to OSB 12.<\/p>\n Client<\/strong>: German Insurance Group and Building Society, Koblenz<\/p>\n Role<\/strong>: Consultant<\/p>\n Technology<\/strong>: Weblogic Server 12, Oracle Service Bus 12, Python, SOAP\/REST<\/p>\n Result<\/strong>: Creation of an architecture for the highly available operation of Weblogic server environments. Extension of a library for the automated provisioning of Weblogic Server environments. Design and implementation of an improved deployment procedure for Java Enterprise applications. Development of highly available Oracle Service Bus domains.<\/p>\n<\/div>\n<\/div>\n Client<\/strong>: German Insurance Group and Building Society, Koblenz<\/p>\n Role<\/strong>: Consultant<\/p>\n Technology<\/strong>: Weblogic Server 12, Oracle SOA Suite 12<\/p>\n Result<\/strong>: Preparation and delivery of a workshop on „Web Single Sign-on with SAML 2.0“ and „WS- Security with OWSM (Oracle Webservices Manager)“ including lecture, demonstration and exercises.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n Client<\/strong>: International logistics group<\/p>\n Role<\/strong>: Consultant<\/p>\n Technology<\/strong>: Oracle Weblogic Server 10.3, Oracle Service Bus 11gR1, SUSE Linux Enterprise Server 11, IBM WebSphere MQ V7.0, Oracle Database 11g, Python, SOAP\/REST<\/p>\n Result<\/strong>: Architecture, design, implementation and execution of high availability tests for an enterprise service bus and messaging platform based on Oracle OSB, Oracle WLS and Java Messaging Service. Evaluation and adaptation of the original architecture. Implementation and deployment of custom solution to improve overall system availability. Creation and tracking of Oracle support cases.<\/p>\n Customer<\/strong>: internal<\/p>\n Technology<\/strong>: Oracle Identity and Access Management (11.1.1.5), Oracle SOA Suite 11g (11.1.1.6.0), Oracle Weblogic Server 10.3.6, Java SE Development Kit 6 Update 33, Oracle JDeveloper 11g (11.1.1.6.0) Studio Edition, Oracle Identity Manager Connector MS AD User Management 11.1.1.5.0, Oracle Database 11g, Release 2, Oracle Virtual Box 4.1.22, Oracle Enterprise Linux 5.8, Microsoft Windows Server 2008 R2, Microsoft Windows 8 Professional<\/p>\n Result<\/strong>: Installation and evaluation of Oracle Identity Manager, creation of an installation tutorial<\/a>. Installation and analysis of the Oracle Active Directory Connector, authoring of a workshop on the installation and use of the Connector<\/a>.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n Customer<\/strong>: IT service provider for the municipal administration, Berlin<\/p>\n Role<\/strong>: Consultant<\/p>\n Technology<\/strong>: Oracle Weblogic Server 12<\/p>\n Result<\/strong>: Accompaniment of a workshop on WLS in the context of a WLS training course<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n Client<\/strong>: internal<\/p>\n Technology<\/strong>: Oracle Weblogic Server 10.3.6, Oracle Forms and Reports 11g Release 2, Oracle Database Express Edition 11g Release 2, Oracle Linux Release 5.8, Oracle SQL Developer 3.1<\/p>\n Result<\/strong>: Training on Oracle Forms and Reports, installation on Windows 7 and on Virtual Box, inclusive database and development tools. Development of a \u201cQuickstart Guide<\/a>\u201d.<\/p>\n<\/div>\n
\nGitHub Copilot Certification
\nThe GitHub Copilot certification exam confirms knowledge in the use of the AI-driven code completion tool for various programming languages. It certifies the ability to effectively optimize software development workflows. This exam focuses on understanding the plans and features of GitHub Copilot, data usage of the AI tool, developer use cases, and the basics of privacy and context exclusions.<\/p>\n2024: Professional Developmen \u2013 HashiCorp Certification<\/h5>\n
2024 Weiterbildung \u2013 Amazon AWS Zertifizierung<\/h5>\n
2021-2024: Migration and upgrade of an Oracle Forms and Reports installation<\/h5>\n
2021\/2022: Planning, setup and configuration of Oracle Service Bus environments<\/h5>\n
2021: Conception of a SAP BW\/4HANA cloud infrastructure on AWS<\/h5>\n
2021: Landing Zone on AWS – Quick Start – Consulting and Implementation<\/h5>\n
2020: Professional Development – Amazon AWS Certification<\/h5>\n
2019: Migration Oracle Service Bus from OnPremise to AWS Cloud<\/h5>\n
2018: Further development of the infrastructure for the operation of Oracle Service Bus and Oracle Weblogic<\/h5>\n
2017: Further development of the infrastructure for the operation of Oracle Service Bus and Oracle Weblogic<\/h5>\n
2015-2017: Building an SOA infrastructure<\/h5>\n
2015: IT Security Workshop<\/h5>\n<\/div>\n
2013-2015: Migration of an existing customer solution into a highly available Enterprise Service Bus platform<\/h5>\n
2012: Professional Development \u2013 Subject: Identity Management<\/h5>\n
2012: WLS Workshop<\/h5>\n
2012: Professional Development \u2013 Subjects: Oracle Forms and Reports<\/h5>\n