Recommended expert

David Portmann

Asset Accounting Support

David Portmann
Oberkirch, Switzerland

Experience

Dec 2024 - Jun 2025
7 months
Switzerland

Asset Accounting Support

Bank Julius Bär

  • Supporting the department in designing the accounting areas.

  • Aligning the accounting areas with the ledgers.

Jan 2024 - Present
2 years 1 month
Switzerland

S/4HANA Migration Implementation

Bank Julius Bär

  • Creating the migration concept.

  • Setting up SAP Migration Cockpit projects using the direct approach.

  • Setting up SAP Migration Cockpit projects using the staging approach.

  • Creating extraction reports for the migration.

  • Developing migration objects in FI, CO, PS, MM, and SD.

  • Adapting migration objects to customer requirements.

  • Performing test and real migrations.

Jan 2024 - Jun 2025
1 year 6 months
Switzerland

Chart of Accounts Standardization

Bank Julius Bär

  • Supporting the department in standardizing the chart of accounts.

  • Assisting in designing the ledgers.

Nov 2023 - Present
2 years 3 months
Switzerland

SGF3 Introduction of New Company

CSS Versicherung AG

  • Conducting analysis and estimation.

  • Setting up a questionnaire for the department.

  • Creating user stories to prepare for the rollout.

Jun 2022 - Jan 2023
8 months
Switzerland

Omega Merger

CSS Versicherung AG

  • Merging Arcosana AG into CSS Krankenversicherung AG.

  • Adjusting interfaces.

  • Migrating open workflows.

  • Coordinating and conducting tests.

Jun 2021 - Nov 2023
2 years 6 months
Switzerland

S/4Hana Implementation

CSS Versicherung AG

  • Designed and coordinated the Fiori Launchpad implementation.

  • Designed and implemented the FI, CO, PS, MM, SD modules.

  • Customized interfaces and handled data migration.

  • Migrated data using the SAP Migration Cockpit with a staging approach.

  • Migrated 3rd-party products and adapted the data distribution model.

  • Managed testing with unit and regression tests.

  • Created Fiori apps for reporting.

Jun 2021 - Jan 2022
8 months
Switzerland

Gotthard Merger

CSS Versicherung AG

  • Merged multiple company codes.

  • Adjusted interfaces.

  • Migrated open workflows.

  • Coordinated and executed tests.

Jun 2019 - May 2021
2 years
Switzerland

Implementation of AP and Expense Workflows (KSWF)

CSS Versicherung AG

  • Conducted as-is analysis and created the requirements catalog.

  • Created user stories and a user story map.

  • Implemented insider validators and verifiers for vendor and expense approvals.

  • Developed Fiori apps for expense requests and reporting.

  • Carried out implementation, testing, and training.

Jun 2017 - May 2019
2 years
Switzerland

Implementation of Electronic Account Documents (eEK)

CSS Versicherung AG

  • Conducted as-is analysis and created the requirements catalog.

  • Created user stories and a user story map.

  • Introduced XS-PBM as the workflow tool.

  • Developed custom approval workflows.

  • Developed Fiori apps for expense requests and various reports.

  • Carried out implementation, testing, and training.

Jun 2015 - May 2017
2 years
Switzerland

Various FS-CD Tasks

CSS Versicherung AG

  • Developed SAP FI/CO strategy with the finance management and group leadership.

  • Supported analysis and implementation of functional requests in SAP CC.

  • Introduced the new payment formats PAIN.001 and PAIN.002 for the Swiss payment harmonization (ISO20022).

  • Set up accounts payable for multiple company codes.

  • Conducted analysis and workshops for electronic bank statements (CAMT.053, CAMT.054).

  • Developed various ABAP and ABAP OO solutions following Scrum Agile.

  • Analyzed, designed, and implemented new commission and brokerage interfaces.

  • Analyzed, designed, and implemented the new expense posting process.

  • Created SAP FI/CO training materials for the SAP CC team and delivered the training.

  • Mentored internal staff in SAP FI/CO.

  • Supported the upgrade to SAP EHP 7.

  • Analyzed, designed, and implemented a master data distribution model via SAP ALE iDoc.

  • Created various FI/CO reports.

  • Served as Scrum Master for the FS-CD team and managed the Jira backlog.

Jan 2015 - May 2015
5 months
Switzerland

Implementation of the Central SAP FS-BP Business Partner

Finance Administration of the Canton of Zurich

  • Analysis and design of the existing SAP FS-BP business partner model.

  • Removal of time dependency in SAP FS-BP.

  • Implementation of the FS-BP concept.

  • Introduction of SAP FS-BP for SAP RE-FX.

  • Cleansing of existing RE-FX and FS-CML business partners.

  • Creating training materials and training end users at the booking center of the Canton of Zurich.

Dec 2014 - Dec 2014
1 month
Switzerland

Travel Expense Accounting and HR

SCOR Reinsurance

  • Migration of posting data to the new SAP environment.
Sep 2014 - Dec 2014
4 months

Implementation of SAP FS-CD

Heidelberger Life

  • Migration of master data and transaction data to SAP FS-CD.

  • Setting up the chart of accounts in SAP FI.

  • Executing tests in SAP FS-CD.

  • Setting up an authorization concept.

  • Implementing the authorization concept.

Aug 2014 - Nov 2014
4 months
Switzerland

Enhancement of SAP FI/CO

CSS Insurance AG

  • As-is analysis of SAP FI/CO.

  • Concept creation for SAP FI/CO enhancements.

  • Implementation of enhancements in SAP FI/CO.

Feb 2014 - Apr 2015
1 year 3 months
Switzerland

Global SAP System

GfK Switzerland AG

  • Migration of master and transaction data to the new global SAP system for the FI/CO, MM, SD, and PS modules.

  • Adapting existing interfaces to the new SAP system.

Aug 2013 - Apr 2014
9 months
Switzerland

Travel Expense Accounting and HR

SCOR Reinsurance

  • Analysis, planning and implementation of the SAP system migration for travel expense accounting and HR.

  • Setting up a basic FI system.

  • Planning and implementing the SAP authorization concept.

Oct 2010 - Apr 2014
3 years 7 months
Switzerland

One General Ledger, One Chart of Account

SCOR Reinsurance

  • Global rollout of SAP New GL for all companies worldwide.

  • Analysis, planning and implementation of interfaces to and from external systems such as technical accounting, investment systems and local applications.

  • Setting up new company codes.

  • Analysis, planning, implementation and training in FI New GL.

  • Planning and implementing the SAP authorization concept.

  • Supporting the FI quarterly and year-end closing.

Nov 2009 - Apr 2010
6 months
Switzerland

Group Currency Change

SCOR Reinsurance

  • Conversion of the group currency with data migration to a new SAP system and conversion of all group currency values from USD to EUR.

  • Creating the migration report for document migration.

  • Migration of FI-GL, FI-AP, FI-AR, FI-AA, FI-BA and CO.

  • Ensuring interface functionality.

Sep 2009 - Jan 2010
5 months
Switzerland

Migration During Ongoing Operations

Valora AG

  • Migration of master data and transactional data.

  • Analysis, planning and implementation of various interfaces in a complex SAP landscape with SAP XI.

  • Development of ABAP reports and Smartforms.

  • Enhancements using the Enhancement Framework and user exits in IDocs and ABAP.

  • Performance analysis and runtime improvements of long-running processes.

  • Consulting and support for various requirements in SAP CCC.

Jul 2009 - Jul 2009
1 month
Switzerland

Performance Analyses

Heineken Switzerland AG

  • Performance analysis and runtime improvements of long-running processes in SD.

  • Analysis, planning and implementation of various customer-specific enhancement optimizations.

Jan 2009 - Dec 2009
1 year
Switzerland

Release Upgrade

SCOR Reinsurance

  • Consulting and support for the SAP upgrade from SAP Enterprise 4.7 to SAP ERP 6.0 EHP 3.

  • Ensuring Unicode compatibility of custom developments in the new release.

  • Ensuring interface functions to and from SAP.

Oct 2008 - Apr 2014
5 years 7 months
Switzerland

SAP CC Support

SCOR Reinsurance

  • Consulting and support for various requirements in SAP CC in modules FI-GL, FI-AP, FI-AR, FI-AA, FI-BA, and CO.

  • ABAP development and Report Painter development.

  • Support for the FI quarterly closing.

  • Analysis, planning, and implementation of various master and transaction data interfaces in SAP FI, CO, and Treasury.

  • Analysis, planning, and implementation of various interfaces from external systems to SAP and from SAP to external systems.

  • Analysis, planning, and implementation of various reports in SAP FI and CO using ABAP and Report Painter.

  • Planning and creating SAP CO planning versions.

Oct 2008 - Apr 2009
7 months
Switzerland

Revios Integration

SCOR Reinsurance

  • Migration of FI-GL, FI-AP, FI-AR, FI-AA, and CO.

  • Creation of the migration report for document migration.

Jun 2008 - Sep 2008
4 months
Switzerland

RAP Replacement

SCOR Reinsurance

  • Design and implementation of all insurance-specific interfaces to SAP.
Jun 2005 - May 2008
3 years
Switzerland

NIKA

CSS Versicherung AG

  • Subproject leadership for SAP master data, interface design, and setting up the system landscape.

  • Creating forms with SAPscript.

  • Planning, building, and operating SAP system landscapes on SAP Enterprise 4.7, SAP ERP 6.0, and Solution Manager 3.5.

  • Systems running on Sun Solaris and Oracle.

  • Planning, building, and operating a complex SAP transport system landscape.

  • Creating, rolling out, and monitoring compliance with the SAP ABAP developer handbook.

  • Technical responsibility for the SAP system during the host-to-SAP migration.

  • Creating the complete master data interface concept and its implementation.

  • Using DirectInput and BAPI methods via JCO calls.

  • Connecting SOA subsystems via JCO and BAPI.

  • Extending the SAP master data concept with custom fields via the Business Data Toolset (BDT).

  • Managing the SAP authorization system.

  • Representative of the SAP Customer Competence Center in the technical architecture team.

  • Performance optimization of the SAP system for migration and operation; performance analysis of SAP reports.

Oct 2004 - Apr 2005
7 months
Switzerland

SAP Basis Consultant

Engineering and System Technology

  • Hardware evaluation, installation, and upgrade of various SAP systems on Microsoft Windows, SunOS, and AIX.

  • Database systems: Microsoft SQL, Oracle, and MaxDB.

  • Operations and customer support with error analysis and performance tuning.

  • ABAP development.

Feb 2002 - Sep 2004
2 years 8 months
Switzerland

Project Lead for International SAP FI/CO Implementation

Rosen Swiss AG

  • Set up and maintenance of the SAP system landscape on Release 4.6C on Microsoft Server 2000 and Microsoft SQL.

  • Set up of the SAP authorization system.

  • Established incident and change management with first-, second-, and third-level support.

  • Introduced Asset Accounting (AA) including process analysis, concept design, rollout, and training.

  • Customizing in FI, CO, and AA modules.

  • Development in ABAP and SAPScript.

Feb 2000 - Dec 2001
1 year 11 months
Switzerland

SAP Release, Platform Migration, and Maintenance

Pilatus Flugzeugwerke AG

  • Module lead for HR, FI, CO, AA, and PS.

  • Managed and executed the SAP release upgrade from 3.0F to 4.6C and platform migration from AS/400 DB2 to MS NT/MS SQL.

  • Development in ABAP and SAPScript.

  • Implemented various requirements in custom developments.

Sep 1999 - Dec 1999
4 months
Switzerland

Freelance ABAP Developer

Portmann Peter

  • ABAP development in contract management for various companies as a freelancer.

Skills

  • Sap S/4hana Implementations
  • Sap Migration Cockpit
  • Senior Consultant In Sap Fi, Co
  • Experience In Ps, Mm, And Sd
  • Sap Distribution Model (Idoc)
  • Sap Abap Oo
  • Clean Code Certified By Majcon.de
  • Fiori Launchpad Including Authorization Catalogs
  • Agile Scrum

Languages

German
Native
English
Advanced

Certifications & licenses

Clean Code Certified

Majcon.de

Need a freelancer? Find your match in seconds.
Try FRATCH GPT
More actions

Similar Freelancers

Discover other experts with similar qualifications and experience

Greg Manley
Greg Manley

MDG-F S/4 Delivery Lead

View Profile
Christel kristin Riedel
Christel kristin Riedel

SAP Senior / Lead Consultant / Team Lead / Trainer

View Profile
Klaus Schmitt
Klaus Schmitt

IT Project Manager and Senior Consultant

View Profile
Thomas Czech
Thomas Czech

External Consultant to Program Management / SCRUM Master

View Profile
Münevver Yilmaz
Münevver Yilmaz

SAP FI/CO Lead Consultant

View Profile
Waleri Moretz
Waleri Moretz

Project Manager

View Profile
Dieter Kuske
Dieter Kuske

SAP Senior Consultant

View Profile
Joachim Peters
Joachim Peters

ERP-SAP/SSC Consultant

View Profile
Andreas Neumann
Andreas Neumann

Project Manager

View Profile
Helgo Göring-drewes
Helgo Göring-drewes

Migration to HANA BP

View Profile
Peter Schordie
Peter Schordie

SAP FI/CO Consulting

View Profile
Christoph Wagner
Christoph Wagner

System Architect / System Engineer / Programmer

View Profile
Erol Tel
Erol Tel

Independent Study

View Profile
Meryem Gündoğdu
Meryem Gündoğdu

Test Manager-SPOT

View Profile
Michael Rödle
Michael Rödle

Project Manager, Hustler, & Hound "Project Metrics on the Internet"

View Profile
Matthias Bullmahn
Matthias Bullmahn

Interim Change Manager

View Profile
George Gambourg
George Gambourg

SAP Authorization Consultant / SAP Authorization Consulting (Freelancer/SAP Consultant)

View Profile
Orhan Yazar
Orhan Yazar

SAP Senior Consultant OTC/MM/WM/LE/CS/PS/GTS, C4C-Cloud (Sales, Services, E-Commerce)

View Profile
Stephan Meissner
Stephan Meissner

SuccessFactors Coordination Recruiting, Employee Central, Performance/Goals, Reporting

View Profile
Hassan Yassine
Hassan Yassine

SAP Application Developer

View Profile
Frank Gutbrod
Frank Gutbrod

Interim Manager Controlling, System Architect

View Profile
Andreas Niestroj
Andreas Niestroj

CO Consultant (Part-time)

View Profile
Gerhard Legelli
Gerhard Legelli

SAP S/4 HANA PS Consultant

View Profile
Onik Mia
Onik Mia

SAP SuccessFactors & S4HANA Consultant

View Profile
Diana Griesshammer
Diana Griesshammer

Interim Project-Controller

View Profile
Thorsten Otremba
Thorsten Otremba

Workstream Lead (WS)

View Profile
Mehmet Akif Seyfi
Mehmet Akif Seyfi

Senior SAP FI/CO Consultant

View Profile
Dominik Meyenburg
Dominik Meyenburg

Data Solution Architect

View Profile
Maciej Dziekanski
Maciej Dziekanski

Device replacement in iMSys with UiPath

View Profile
Alagi Mansaray
Alagi Mansaray

Senior Project Manager S4HANA in the Energy Sector

View Profile