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David Portmann - Asset Accounting Support

David Portmann
Profile header overlay
Oberkirch, Switzerland

Experience

Dec 2024 - Jun 2025
7 months
Switzerland

Asset Accounting Support

Bank Julius Bär

Expertise details
Position Summary
Asset Accounting Support at Bank Julius Bär
Industries
Banking and Finance
Business Areas
Accounting
  • Supporting the business department in the design of depreciation areas.

  • Reconciling the depreciation areas to the ledgers.

Jan 2024 - Present
2 years 3 months
Switzerland

S/4HANA Migration Implementation

Bank Julius Bär

Expertise details
Position Summary
S/4HANA Migration Implementation at Bank Julius Bär
Industries
Banking and Finance
Business Areas
Information Technology
  • Developing 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.

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

  • Adapting migration objects to customer requirements.

  • Performing test and live migrations.

Jan 2024 - Jun 2025
1 year 6 months
Switzerland

Chart of Accounts Harmonization

Bank Julius Bär

Expertise details
Position Summary
Chart of Accounts Harmonization at Bank Julius Bär
Industries
Banking and Finance
Business Areas
Accounting
  • Supporting the business department in harmonizing the chart of accounts.

  • Supporting the design of the ledgers.

Nov 2023 - Present
2 years 5 months
Switzerland

SGF3 Introduction of a New Company

CSS Versicherung AG

Expertise details
Position Summary
SGF3 Introduction of a New Company at CSS Versicherung AG
Industries
Insurance
Business Areas
Information Technology
Project Management
  • Preparing analysis and estimates.

  • Setting up a questionnaire for the business department.

  • Creating user stories to prepare the implementation.

Jun 2022 - Jan 2023
8 months
Switzerland

Omega Merger

CSS Versicherung AG

Expertise details
Position Summary
Omega Merger at CSS Versicherung AG
Industries
Insurance
Business Areas
Information Technology
Quality Assurance
  • Merging Arcosana AG into CSS Krankenversicherung AG.

  • Adjusting the interfaces.

  • Migrating the open workflows.

  • Coordinating and executing the tests.

Jun 2021 - Nov 2023
2 years 6 months
Switzerland

S/4Hana Implementation

CSS Versicherung AG

Expertise details
Position Summary
S/4Hana Implementation at CSS Versicherung AG
Industries
Insurance
Business Areas
Finance
Information Technology
Project Management
  • Design and coordination of the Fiori Launchpad implementation.

  • Design and rollout of the FI, CO, PS, MM, SD modules.

  • Interface adjustments and data migration.

  • Data migration using the SAP Migration Cockpit with a staging approach.

  • Migration of 3rd-party products and adjustment of the data distribution model.

  • Test management with unit and regression tests.

  • Created Fiori apps for reporting.

Jun 2021 - Jan 2022
8 months
Switzerland

Gotthard Merger

CSS Versicherung AG

Expertise details
Position Summary
Gotthard Merger at CSS Versicherung AG
Industries
Insurance
Business Areas
Accounting
Information Technology
Quality Assurance
  • Merger of multiple company codes.

  • Interface adjustments.

  • Migration of open workflows.

  • Coordination and execution of tests.

Jun 2019 - May 2021
2 years
Switzerland

Implementation of Accounts Payable and Expense Workflows (KSWF)

CSS Versicherung AG

Expertise details
Position Summary
Implementation of Accounts Payable and Expense Workflows (KSWF) at CSS Versicherung AG
Industries
Insurance
Business Areas
Accounting
Finance
Information Technology
  • As-is analysis and creation of the requirements catalog.

  • Creation of user stories and a user story map.

  • Introduction of insider validators and verifiers for accounts payable and expense approvals.

  • Development of Fiori apps for expense requests and reporting.

  • Implementation, testing, and training preparation.

Jun 2017 - May 2019
2 years
Switzerland

Implementation of Electronic Account Documents (eEK)

CSS Versicherung AG

Expertise details
Position Summary
Implementation of Electronic Account Documents (eEK) at CSS Versicherung AG
Industries
Insurance
Business Areas
Information Technology
Quality Assurance
  • As-is analysis and creation of the requirements catalog.

  • Creation of user stories and a user story map.

  • Introduction of XS-PBM as the workflow tool.

  • Development of custom approval processes.

  • Development of Fiori apps for expense requests and various reports.

  • Implementation, testing, and training preparation.

Jun 2015 - May 2017
2 years
Switzerland

Various Tasks in the FS-CD Environment

CSS Versicherung AG

Expertise details
Position Summary
Various Tasks in the FS-CD Environment at CSS Versicherung AG
Industries
Insurance
Business Areas
Finance
Information Technology
Project Management
  • Strategy planning for SAP FI/CO with the head of accounting and corporate management.

  • Supporting the analysis and implementation of functional requests in SAP CC.

  • Introduction of the new PAIN.001 and PAIN.002 payment formats for Switzerland's payment harmonization (ISO20022).

  • Setting up accounts payable for multiple company codes.

  • Analysis and workshops for the electronic bank statement (CAMT.053, CAMT.054).

  • Development of various ABAP and ABAP OO programs using Scrum Agile.

  • Analysis, design, and implementation of the new commissions and brokerage interfaces.

  • Analysis, design, and implementation of the new expense reporting process.

  • Creation of training materials for SAP FI/CO for the SAP CC team and delivery of the training.

  • Developing internal staff in SAP FI/CO.

  • Support for the upgrade to SAP EHP 7.

  • Analysis, design, and implementation of a master data distribution model via SAP ALE iDoc.

  • Creation of various FI/CO reports.

  • Scrum Master of the FS-CD team, managing 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

Expertise details
Position Summary
Implementation of the central SAP FS-BP business partner at Finance Administration of the Canton of Zurich
Industries
Government and Administration
Business Areas
Information Technology
  • Analysis and design of the existing SAP FS-BP business partner model.

  • Removal of time dependencies in SAP FS-BP.

  • Implementation of the FS-BP concept.

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

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

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

Dec 2014 - Dec 2014
1 month
Switzerland

Travel expense accounting and HR

SCOR Reinsurance

Expertise details
Position Summary
Travel expense accounting and HR at SCOR Reinsurance
Industries
Insurance
Business Areas
Accounting
Human Resources
Information Technology
  • Migration of the posting data into the new SAP environment.
Sep 2014 - Dec 2014
4 months

Introduction of SAP FS-CD

Heidelberger Leben

Expertise details
Position Summary
Introduction of SAP FS-CD at Heidelberger Leben
Industries
Insurance
Business Areas
Finance
Information Technology
  • Migration of master data and transaction data into 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

Further development of SAP FI/CO

CSS Versicherung AG

Expertise details
Position Summary
Further development of SAP FI/CO at CSS Versicherung AG
Industries
Insurance
Business Areas
Finance
Information Technology
  • As-is analysis of SAP FI/CO.

  • Creating the concept for further development of SAP FI/CO.

  • Implementing enhancements in SAP FI/CO.

Feb 2014 - Apr 2015
1 year 3 months
Switzerland

Global SAP System

GfK Switzerland AG

Expertise details
Position Summary
Global SAP System at GfK Switzerland AG
Industries
Information Technology
Business Areas
Finance
Information Technology
Procurement
  • 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

Expertise details
Position Summary
Travel Expense Accounting and HR at SCOR Reinsurance
Industries
Insurance
Business Areas
Accounting
Human Resources
Information Technology
  • Analysis, planning, and implementation of the SAP system migration for travel expense accounting and HR.

  • Setting up a core 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

Expertise details
Position Summary
One General Ledger, One Chart of Account at SCOR Reinsurance
Industries
Insurance
Business Areas
Accounting
Finance
Information Technology
  • Global rollout of SAP New GL for all companies worldwide.

  • Analysis, planning, and implementation of interfaces to and from external systems like 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 quarter-end and year-end closing.

Nov 2009 - Apr 2010
6 months
Switzerland

Group Currency Change

SCOR Reinsurance

Expertise details
Position Summary
Group Currency Change at SCOR Reinsurance
Industries
Insurance
Business Areas
Finance
Information Technology
  • Changing the group currency by migrating data to a new SAP system and converting all group currency values from USD to EUR.

  • Creating the migration report for document migration.

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

  • Ensuring interface functionality.

Sep 2009 - Jan 2010
5 months
Switzerland

Migration during live operations

Valora AG

Expertise details
Position Summary
Migration during live operations at Valora AG
Industries
Retail
Business Areas
Information Technology
  • Migration of master and transactional data.

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

  • Development of ABAP reports and Smart Forms.

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

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

  • Consulting and support for various requirements in the SAP CCC.

Jul 2009 - Jul 2009
1 month
Switzerland

Performance Analysis

Heineken Switzerland AG

Expertise details
Position Summary
Performance Analysis at Heineken Switzerland AG
Industries
Food and Beverage
Business Areas
Information Technology
  • Performance analysis and runtime improvements for long-running processes in SD.

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

Jan 2009 - Dec 2009
1 year
Switzerland

Release Upgrade

SCOR Reinsurance

Expertise details
Position Summary
Release Upgrade at SCOR Reinsurance
Industries
Insurance
Business Areas
Information Technology
  • Consulting and support during the SAP upgrade from SAP Enterprise 4.7 to SAP ERP 6.0 EHP 3.

  • Ensuring the 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

Support for SAP CC

SCOR Reinsurance

Expertise details
Position Summary
Support for SAP CC at SCOR Reinsurance
Industries
Insurance
Business Areas
Accounting
Finance
Information Technology
  • Consulting and support for various requirements in SAP CC in the 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.

  • Analyzing, planning, and implementing various master and transactional data interfaces in SAP FI, CO, and Treasury.

  • Analyzing, planning, and implementing various interfaces from external systems to SAP and from SAP to external systems.

  • Analyzing, planning, and implementing 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

Expertise details
Position Summary
Revios Integration at SCOR Reinsurance
Industries
Insurance
Business Areas
Accounting
  • Migration of FI-GL, FI-AP, FI-AR, FI-AA, and CO.

  • Creating the migration report for document migration.

Jun 2008 - Sep 2008
4 months
Switzerland

RAP Replacement

SCOR Reinsurance

Expertise details
Position Summary
RAP Replacement at SCOR Reinsurance
Industries
Insurance
Business Areas
Information Technology
  • Designing and implementing all insurance-specific interfaces to SAP.
Jun 2005 - May 2008
3 years
Switzerland

NIKA

CSS Versicherung AG

Expertise details
Position Summary
NIKA at CSS Versicherung AG
Industries
Insurance
Business Areas
Information Technology
Project Management
  • Sub-project leadership for SAP master data, interface design, and system landscape setup.

  • 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 landscape.

  • Creating, introducing, and monitoring compliance with the developer handbook for SAP ABAP.

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

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

  • Using the DirectInput and BAPI methods via JCO calls.

  • JCO and BAPI integration with SOA external systems.

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

  • Maintaining the SAP authorization system.

  • Representing the SAP Customer Competence Center in the technical architecture team.

  • Optimizing SAP system performance for migration and operation; performance analysis of SAP reports.

Oct 2004 - Apr 2005
7 months
Switzerland

SAP Basis Consultant

Engineering and System Technology

Expertise details
Position Summary
SAP Basis Consultant at Engineering and System Technology
Industries
Information Technology
Business Areas
Customer Service
Information Technology
Product Development
  • Hardware evaluation, installation and upgrade of various SAP systems on Microsoft Windows, SunOS and AIX.

  • Database systems Microsoft SQL, Oracle and MaxDB.

  • Operation and customer support with error analysis and performance optimization.

  • Developments in ABAP.

Feb 2002 - Sep 2004
2 years 8 months
Switzerland

Project lead for international SAP FI/CO implementation

Rosen Swiss AG

Expertise details
Position Summary
Project lead for international SAP FI/CO implementation at Rosen Swiss AG
Industries
Information Technology
Business Areas
Accounting
Information Technology
Project Management
  • Set up and maintenance of the SAP system landscape on release 4.6C on Microsoft Server 2000 and Microsoft SQL.

  • Setup of the SAP authorization system.

  • Establishment of an incident and change management with first, second and third level support.

  • Implementation of Asset Accounting (AA) with process analysis, concept design, rollout and training.

  • Customizing in the FI, CO and AA modules.

  • Developments in ABAP and SAPScript.

Feb 2000 - Dec 2001
1 year 11 months
Switzerland

SAP release, platform migration and maintenance

Pilatus Flugzeugwerke AG

Expertise details
Position Summary
SAP release, platform migration and maintenance at Pilatus Flugzeugwerke AG
Industries
Aerospace and Defense
Business Areas
Finance
Human Resources
Information Technology
  • Module lead for HR, FI, CO, AA and PS.

  • Management and execution of the SAP release upgrade from 3.0F to 4.6C and platform migration from AS400/DB2 to MS NT/MS SQL.

  • Developments in ABAP and SAPScript.

  • Implementation of various requirements in custom developments.

Sep 1999 - Dec 1999
4 months
Switzerland

Freelance ABAP Developer

Portmann Peter

Expertise details
Position Summary
Freelance ABAP Developer at Portmann Peter
Business Areas
Information Technology
  • ABAP developments in contract management for various companies as a freelancer.

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Insurance, Information Technology, Banking and Finance, Aerospace and Defense, Government and Administration, and Retail.

Insurance
Information Technology
Banking and Finance
Aerospace and Defense
Government and Administration
Retail
Profile match chart

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Finance, Accounting, Project Management, Quality Assurance, and Human Resources.

Information Technology
Finance
Accounting
Project Management
Quality Assurance
Human Resources
Profile match chart

Skills

  • Sap S/4hana Implementations
  • Sap Migration Cockpit
  • Senior Consultant In Sap Fi, Co
  • Knowledge 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

Statistics

Experience

Total positions 29
Experience in Insurance 20 y
Avg length 1 y 4 m
Longest experience 5 y 6 m

Global Experience

Countries worked in 1 (Switzerland)
Primary country Switzerland

Expertise

Recent roles Asset Accounting Support, S/4HANA Migration Implementation, Chart of Accounts Harmonization
Main industries Insurance, Information Technology, Banking and Finance
Main business areas Information Technology, Finance, Accounting

Qualifications

Certifications earned 1

Profile

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is David based?

David is based in Oberkirch, Switzerland and can operate in on-site, hybrid, and remote work models.

What languages does David speak?

David speaks the following languages: German (Native), English (Advanced).

How many years of experience does David have?

David has at least 26 years of experience. During this time, David has worked in at least 29 different roles and for 12 different companies. The average length of individual experience is 1 year and 11 months. Note that David may not have shared all experience and actually has more experience.

What roles would David be best suited for?

Based on recent experience, David would be well-suited for roles such as: Asset Accounting Support, S/4HANA Migration Implementation, Chart of Accounts Harmonization.

What is David's latest experience?

David's most recent position is Asset Accounting Support at Bank Julius Bär.

What companies has David worked for in recent years?

In recent years, David has worked for Bank Julius Bär and CSS Versicherung AG.

Which industries is David most experienced in?

David is most experienced in industries like Insurance, Information Technology, and Banking and Finance. David also has some experience in Aerospace and Defense, Government and Administration, and Retail.

Which business areas is David most experienced in?

David is most experienced in business areas like Information Technology, Finance, and Project Management. David also has some experience in Accounting, Quality Assurance, and Human Resources.

Which industries has David worked in recently?

David has recently worked in industries like Insurance and Banking and Finance.

Which business areas has David worked in recently?

David has recently worked in business areas like Information Technology, Project Management, and Finance.

Does David have any certificates?

David has 1 certificate: Clean Code Certified.

What is the availability of David?

David will be available full-time from January 2027.

What is the rate of David?

David's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.

How to hire David?

To hire David, click the Meet button on the profile to request a meeting and discuss your project needs.

Average rates for similar positions

Rates are based on recent contracts and do not include FRATCH margin.

1200
900
600
300
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Market avg: 1000-1160 €
The rates shown represent the typical market range for freelancers in this position based on recent contracts on our platform.
Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.

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