Justin Tönjes
Work Package Lead
Experience
Work Package Lead
Heraeus Consulting & IT Solutions GmbH
Configuration of interfaces in the SAP context
Troubleshooting, SQL debugging
Project Manager
Heraeus Consulting & IT Solutions GmbH
Project management for the introduction of a PaaS solution for job management and migration of the legacy system
Demand management
Project management
Process planning
Creating documentation
Risk management
Coordination of project staff
Vendor management
Administration of heterogeneous SAP landscapes
Heraeus Consulting & IT Solutions GmbH
Administration of heterogeneous SAP landscapes (On Premise, AWS - IaaS)
Database administration SAP MaxDB, SAP HANA
Hardening of SAP systems
Configuration of single sign-on
Incident management (ITIL)
Configuration of interfaces
SAP updates and upgrades
Work Package Lead
REWE Systems
Installation/configuration of an SAP system landscape with the SecurityBridge add-on
Installation of various systems and serving as technical point of contact
Configuration of SAP Fiori Launchpad, Fiori apps
Configuration of single sign-on
Configuration of interfaces
Administration of heterogeneous SAP landscapes
REWE Systems
Administration of heterogeneous SAP landscapes (On Premise, Google Cloud - IaaS)
Database administration DB2, SAP HANA
Hardening of SAP systems
Configuration of single sign-on
Incident management (ITIL)
Automation using Shell, Python, and SQL scripting (SAP LAMA - SaaS)
SAP updates and upgrades
Project Associate
EWE AG
SAP Basis support during the implementation of SAP S/4HANA (Greenfield)
Installation of various systems and acting as technical contact
Configuration of SAP Fiori Launchpad, Fiori Apps and SAP Migration Cockpit
Configuration of Single Sign-On
Work Package Lead
EWE AG
- Connecting various BW systems and SAP HANA databases to SAC
SAP Basis Team Lead
BTC IT Services GmbH
Disciplinary and professional responsibility for 15 employees
Project management of various SAP projects
Responsibility for operating heterogeneous SAP landscapes (ERP, SRM, IS-U, HCM, S/4HANA, BW/4HANA, XI/PI/PO, BW, HANA XSA, GRC, Mobile Engine, etc.)
Customer contact
Vendor management
Temporary staffing
Work and service contracts
Nearshoring
Work Package Lead
EWE AG
Restructuring existing SAP landscapes (SAP PI/PO) into a distributed system landscape
Setting up a cluster solution (Pacemaker, IBM TSAMP, DB2 HADR)
Work Package Lead
EWE AG
Technical execution of migration from SAP HANA XSC to SAP HANA XSA
Installation of SAP HANA XSA
Creating spaces and organizations
User management (SAP HANA native and SAP HANA XSA)
Installation of SAP HANA XSA apps
Administration of SAP HANA XSA
Project Manager
EWE AG
Project management
Demand management
Process planning
Risk management
Coordination of project team members
Technical migration of all SAP systems from SLES 11 to SLES 12
Migration of file systems to new servers
Database-native backup/restore
Configuration of interfaces
Work Package Manager
EWE AG
SAP HANA upgrade to HANA 2 with MDC implementation
Update of the related SAP HANA cockpit
Work Package Manager
EWE AG
Restructuring of existing SAP landscapes (ERP, IS-U) into a distributed system landscape
Setup of a cluster solution (Pacemaker, IBM TSAMP, DB2 HADR)
Work Package Manager
EWE AG
SAP HANA upgrade to HANA 2 with MDC implementation
Configuration of interfaces
Installation of SAP HANA cockpit
Update of the related SAP Landscape Transformation servers
Project team member
EWE AG
Release change from SAP ERP 6 EHP 7 to SAP ERP 6 EHP 8
Stack calculation
Coordination between business unit and development
Execution of SAP Update Manager and follow-up tasks
Work Package Manager
Thüringer Energie AG
Installation of an SAP IS-U landscape
SAP and database installation
Configuration of Single Sign-On
Monitoring configuration (SAP Solution Manager, Icinga/Nagios)
Creation of a backup strategy
Coordination with the business unit
Configuration of the transport system
Configuration of interfaces
Work Package Manager
EWE AG
Implementation of a native SAP HANA database with XSA and XSC
Replication of various tables from SAP and non-SAP sources for Big Data using SAP Landscape Transformation (SLT) and SAP HANA SDI/SDA
Permanent Position
BTC IT Services GmbH
Project work
SAP updates & upgrades
SAP subproject management
Change management (ITIL)
Administration of heterogeneous SAP landscapes
Configuration of Single Sign-On
SLT Replication Server
Monitoring (SAP Solution Manager, Icinga/Nagios)
Incident management (ITIL)
Automation through shell, Python, and SQL scripting
System copy manually or (partially) automated
User administration
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 Information Technology (10.5 years), Professional Services (4 years), Retail (4 years), Utilities (4 years), and Energy (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 Information Technology (10.5 years), Project Management (10 years), Operations (6.5 years), and Business Intelligence (1 year).
Summary
My career took me from a Northern German IT service provider to self-employment. As a certified SAP technology consultant (formerly SAP Basis) and interim manager, I help you achieve successful project completion and smooth SAP operations. Since I'm interested in new technologies, I started working with SAP HANA early and today I have a strong focus on automation, IaaS, PaaS, and SaaS. It's always important to me to align my work with ITIL.
Skills
- Sap Basis Administration (Certified)
- Databases: Sap Hana (Certified), Sap Ase, Oracle, Sap Maxdb, Db2, Ms Sql Server
- Sap Hana Xsa
- Sap Hana Sdi/sda, Sap Slt
- Operating Systems (Sles, Rhel, Aix, Windows)
- Sap Solution Manager And Sap Focused Run
- Python And Shell Scripting
- Iaas (Gcp, Azure, Aws)
- Project Management
- Paas (Redwood, Sap Btp)
- Team Leadership
- Saas (Sap Landscape Management Cloud)
- Itil And Iso/iec 20000
Languages
Certifications & licenses
SAP HANA
SAP Basis Administration
Profile
Frequently asked questions
Do you have questions? Here you can find further information.
Where is Justin based?
What languages does Justin speak?
How many years of experience does Justin have?
What roles would Justin be best suited for?
What is Justin's latest experience?
What companies has Justin worked for in recent years?
Which industries is Justin most experienced in?
Which business areas is Justin most experienced in?
Which industries has Justin worked in recently?
Which business areas has Justin worked in recently?
Does Justin have any certificates?
What is the availability of Justin?
What is the rate of Justin?
How to hire Justin?
Average rates for similar positions
Rates are based on recent contracts and do not include FRATCH margin.
Similar Freelancers
Discover other experts with similar qualifications and experience
Experts recently working on similar projects
Freelancers with hands-on experience in comparable project as a Work Package Lead
Nearby freelancers
Professionals working in or nearby Oldenburg, Germany
