Ayhan Ibraim - Interim Procurement Manager for SAP Ariba

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Castrop-Rauxel, Germany

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Experience

Mar 2025 - May 2025

3 months

Interim Procurement Manager

Cofinity-X GmbH

High-level process and system analysis
Support for building a new process and system landscape
Systems: SAP MM, SAP SRM, SAP WM/EWM, SAP R3/S4 HANA, Navision, E2E
E-Procurement: SAP Ariba, Coupa

Apr 2024 - Jun 2025

1 year 3 months

Interim Procurement Manager

United Internet AG

Strategy implementation using MS Office and MS Project
Management of civil engineering suppliers (FTTx), bill of quantities
Systems: Clarity, JIRA, Confluence, BPMN, Signavio
Planning, civil works, assembly, documentation
Framework agreement design and negotiation
Support for rebuilding the end-to-end process and system landscape
Retail-specific system: Visual Merchandising

Nov 2023 - Mar 2024

5 months

Interim Procurement Consultant

E.ON Future Energy Home

Developed concept to optimize operational procurement processes
Optimized pricing and risk strategy
Integrated joint ventures into procurement processes
Designed a control model

Jul 2023 - Mar 2024

9 months

Interim Head of Procurement

Metrofibre GmbH

Implementation of space management software
Establishment of automated variable purchasing
Supplier management for passive technology, store replenishment
Strategy development for FTTh civil engineering suppliers and bill of quantities
Framework agreement design and negotiation
Management of kick-off to final execution
Project management methods: classic, agile, hybrid
Support for rebuilding the end-to-end process and system landscape

Apr 2023 - Apr 2023

1 month

Interim Procurement Consultant

KIK Textilien und Non Food GmbH

Developed e-procurement strategy
Planned European roll-out

Jun 2022 - Oct 2022

5 months

Interim Streamlead Procurement

Stadtwerke Düsseldorf

Agile project organization and communication with executive management
Cross-stream communication
Resource and capacity planning internally and externally
Roadmap creation
Requirements analysis and evaluation
SAP R/3 to S/4Hana transformation, SRM replacement with e-procurement
Catalog and supplier management
Optimization of P2P and S2C procurement processes
Replacement of WM with EWM, fit-gap analyses
Orchestration of content and interfaces
Invoice management and digitization of invoice verification
Harmonization of multiple entities, process documentation including RICEFW and delta requirements

Nov 2021 - May 2022

7 months

Interim Project Manager Procurement

Curevac AG

SAP R/3 to SAP S/4Hana transformation
Fit-to-standard process optimization
Conceptualized and introduced e-procurement (SAP Ariba)
Optimized P2P procurement processes and invoice management
Digitalization initiatives, as-is/to-be analysis
Change management

Nov 2021 - Mar 2022

5 months

Interim Procurement Consultant

Engel Austria AG

Optimized P2P procurement processes
Digitalization and as-is/to-be analysis
SAP MM environment, introduced SAP Ariba

Jun 2020 - Dec 2021

1 year 7 months

Interim Procurement Consultant

EnBW ODR AG

SAP R/3 to SAP S/4Hana transformation
Fit-to-standard process optimization
Prepared for e-procurement (Ivalua) introduction
MM optimization, process adaptation and digitalization
As-is/to-be and gap analysis
Change management and implementation concept
Integration of subsidiaries

Oct 2019 - Jan 2020

4 months

Interim Procurement Consultant

DMG MORI AG

Supported central procurement restructuring
Prepared MVP for SAP Ariba introduction during R3 to S4/Hana migration
Process optimization, analysis, and implementation concept

Apr 2019 - Sep 2019

6 months

Interim Project Manager Procurement

ISS Facility Holding GmbH

Optimized e-procurement with Coupa
End-to-end process analysis
SAP MM and Coupa system environment

Jul 2018 - Jul 2018

1 month

Interim Project Manager Procurement

Merz Pharma

Project management: high-level planning and structuring
Systems: SAP Ariba, SAP MM

Mar 2018 - May 2018

3 months

Interim Technical/Functional Project Lead Procurement

Vaillant Group

Process optimization and analysis
Project restructuring, blueprint review, standard vs. requirements
Systems: SAP Ariba, SAP MM

Aug 2013 - Jan 2018

4 years 6 months

Interim Team Lead & Project Lead Procurement

Itergo GmbH

Led IT coordination unit for procurement and invoice verification
Project lead for procurement and invoice verification subprocesses
Subprojects: catalog consolidation, procurement transparency, SAP disposition monitor, invoice verification
Annual planning, release and test management
Integration of subsidiaries in roll-out activities
Change and incident management

Aug 2012 - Jul 2013

1 year

Interim Indirect Procurement

ERGO Group AG

Managed operational procurement of services (creative, marketing, mailings, call centers, translations)
Managed market research projects, framework agreements
Conducted vendor comparisons and workflow analyses

Jun 2011 - Jun 2014

3 years 1 month

Sole Proprietor

PPS Service

Provided POS services: sales promotion, space management, merchandising, planogramming
Shelf management, secondary placements, special displays
Setup and teardown of sales systems
Store layout and assortment builds per guidelines
Rack jobbing

Feb 2008 - May 2011

3 years 4 months

Head of Procurement

RSR Datacom GmbH

Procurement responsibility for all material groups in telecommunications and broadband expansion
Service and technical procurement: Ericsson OMS, SOA network management, fiber and copper cables, network cabinets
Managed civil engineering projects, project coordination
Tendering for clients (Vodafone, Versatel, Deutsche Bahn)
Supplier management and contract negotiations
Warehouse management, framework agreements, process optimization
Fleet management, ERP system responsibility

Feb 2007 - Jan 2008

1 year

Project Buyer

DIS AG

Service procurement and technical purchasing: Ericsson, Siemens, Cisco, TK systems, fiber cables
Civil engineering projects, project coordination and management
Tendering, supplier management, contract negotiations
Warehouse management, process optimization

Sep 2005 - Jan 2007

1 year 5 months

Consultant

PEAG Auffanggesellschaft

Supported organizational realignment

Aug 1999 - Aug 2005

6 years 1 month

Procurement Assistant / Clerk

Karstadt Warenhaus AG

Purchased small electrical appliances
Inventory planning and special item management, reporting and analysis
Supplier management and automated store replenishment (VFN)
Space management, visual merchandising, planogramming
Prepared prospectuses, negotiated with suppliers
Managed internet auctions (GNX), master data maintenance
Sample preparation
Sales support, deputy department manager

Industry experience

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

Experienced in Retail, Telecommunication, Information Technology, Professional Services, Utilities, and Manufacturing.

Retail

Telecommunication

Information Technology

Professional Services

Utilities

Manufacturing

Business area experience

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

Experienced in Procurement, Project Management, Supply Chain Management, Information Technology, Logistics, and Marketing.

Procurement

Project Management

Supply Chain Management

Information Technology

Logistics

Marketing

Summary

25 years of operational, strategic and management experience in procurement across various industries
with personnel responsibility
13 years of consulting experience
IT know-how in the context of digitalization for next-generation procurement
E-Procurement certification
social skills

Skills

Systems: Sap Mm, Sap Srm, Sap Wm/Ewm, Sap R3/S4 Hana, Navision, Ms Office, Ms Project, Clarity, Jira, Confluence, Bpmn, Signavio
E-Procurement: Sap Ariba, Coupa
Retail-Specific Systems: Visual Merchandising, Space Management Software, Automated Variable Store Replenishment
Project Management Methods: Classic, Agile, Hybrid

Languages

Greek

Native

Turkish

Advanced

English

Intermediate

German

Elementary

Education

Oct 2007 - Jun 2010

VWA Essen

Diploma in Business Administration, focus: Project Management · Business Administration · Essen, Germany

Oct 2007 - Jun 2009

VWA Essen

VWA Project Management Economist · Project Management · Essen, Germany

Certifications & licenses

Coupa Product Certified Platform Certification

Dublin, Ireland

E-Procurement certification

VWA Project Management Economist certification

Statistics

Experience

Total positions 20

Experience in Retail 9 y

Avg length 1 y 3 m

Longest experience 6 y

Expertise

Recent roles Interim Procurement Manager, Interim Procurement Consultant, Interim Head of Procurement

Main industries Retail, Telecommunication, Information Technology

Main business areas Procurement, Project Management, Supply Chain Management

Qualifications

Certifications earned 3

Profile

Member since

June 2024

Last update

January 2026

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Frequently asked questions

Have questions? Find more information here.

Ayhan is based in Castrop-Rauxel, Germany.

Ayhan speaks the following languages: Greek (Native), Turkish (Advanced), English (Intermediate), German (Elementary).

Ayhan has at least 24 years of experience. During this time, Ayhan has worked in at least 13 different roles and for 20 different companies. The average length of individual experience is 1 year and 2 months. Note that Ayhan may not have shared all experience and actually has more experience.

Based on recent experience, Ayhan would be well-suited for roles such as: Interim Procurement Manager, Interim Procurement Consultant, Interim Head of Procurement.

Ayhan's most recent position is Interim Procurement Manager at Cofinity-X GmbH.

In recent years, Ayhan has worked for Cofinity-X GmbH, United Internet AG, E.ON Future Energy Home, Metrofibre GmbH, and KIK Textilien und Non Food GmbH.

Ayhan is most experienced in industries like Retail, Telecommunication, and Information Technology. Ayhan also has some experience in Professional Services, Utilities, and Insurance.

Ayhan is most experienced in business areas like Procurement, Project Management, and Supply Chain Management. Ayhan also has some experience in Information Technology, Logistics, and Marketing.

Ayhan has recently worked in industries like Telecommunication, Utilities, and Biotechnology.

Ayhan has recently worked in business areas like Procurement, Project Management, and Supply Chain Management.

Ayhan attended VWA Essen for Business Administration.

Ayhan has 3 certificates. These include: Coupa Product Certified Platform Certification, E-Procurement certification, and VWA Project Management Economist certification.

The availability of Ayhan needs to be confirmed.

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Daily rate avg. 851 €

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Median rate 800 €

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Calculated based on our freelancers’ daily rates as of 6 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.