Dennis R.
Interim Senior Strategic Buyer
Experience
Jan 2025 - Jun 2025
6 monthsHamburg, Germany
Interim Senior Strategic Buyer
Wintershall Dea International GmbH
- Integration and transformation after the acquisition of a company (M&A)
- Supplier management, contract negotiations, process support, contract redesign and transfer
Dec 2024 - Jul 2025
8 monthsBrussels, Belgium
Freelance Expert
European Defence Agency
- EDSTAR program
- Revision and optimization of NATO standards (procurement)
- Project- and hourly-based work
Mar 2024 - Dec 2024
10 monthsKassel, Germany
Interim Senior Strategic Buyer
Wintershall Dea GmbH
- Carve-out and transformation after the sale of the company (M&A)
- Supplier management, contract negotiations, process support
- Digital transformation: eProcurement
Aug 2023 - Jul 2025
2 yearsBrussels, Belgium
Freelance Expert
European Commission
- Technical due diligence of a blockchain and AI application
- Evaluation of the SaaS solution in supply chain and procurement
- Reporting
- Project- and hourly-based work
Feb 2023 - Jul 2025
2 years 6 monthsLuxembourg
Founder & Managing Director
Supplier Sentinel Sàrl
- Technology development for procurement and logistics
- Development of a web app for supplier risk management
- Digitalization of procurement processes
Jan 2023 - Dec 2023
1 yearKassel, Germany
Interim Senior Tactical Buyer
Wintershall Dea AG
- Procurement of software and licenses + managed services
- Supplier management, contract negotiations, process optimization
- Spend analysis, forecasting, digitization, tenders
Aug 2022 - Dec 2022
5 monthsHamburg, Germany
Interim Senior Strategic Buyer
NVL B.V. & Co. KG
- Procurement of licenses (SaaS, cloud, on-premise), managed services
- Risk management, contract negotiations, process optimization
- Spend analysis, forecasting, digitization
Jan 2022 - Oct 2022
10 monthsLandau, Germany
Interim Senior Strategic Buyer
Progroup AG
- Procurement of hardware, software, and licenses (SaaS, cloud)
- Tender management, contract negotiations, process optimization
- Spend analysis, forecasting, digitization, managed print services
Jul 2021 - Dec 2021
6 monthsKitzingen, Germany
Interim Senior Strategic Buyer
Knauf Gips KG
- Procurement of software and licenses (SaaS, cloud)
- Tender management, contract negotiations, process optimization
- Spend analysis, forecasting, digitization, etc.
Aug 2019 - Jun 2020
11 monthsLuxembourg
Interim Senior Strategic Buyer
DuPont De Nemours SARL
- Procurement of production materials, indirect and direct
- "Extended workbench" controls, rework, refinement, etc.
- Contract drafting including negotiations + procurement optimizations
May 2019 - Jul 2025
6 years 3 monthsLuxembourg
Founder & Managing Director
SYBX Group Sàrl
- Strategy, interim management, digitalization, consulting
- From July 2020 to June 2021 trainer in fire protection, e.g. for the DEKRA Academy
Jun 2018 - Apr 2019
11 monthsFrankfurt, Germany
Senior Operational Buyer
BNP Paribas S.A.
- Procurement of, e.g., professional services, IT hardware & software
- Business continuity management & contract management + digitalization
- Forecasting & analyses, tenders + negotiations (contracts)
- Implementation of new processes and tools (e-invoicing, etc.)
Jan 2016 - Dec 2018
3 yearsSteinbach, Germany
Founder & Managing Director
Shiny Box GmbH
- Car care products online shop
- Part-time Jan 2016 – May 2017 & Jun 2018 – Dec 2018
- Marketing, sales, product management, procurement of raw materials
Dec 2015 - May 2017
1 year 6 monthsOberursel, Germany
Buyer
Rolls-Royce Deutschland Ltd & Co KG
- Procurement of, e.g., engine components, raw materials (international)
- Supplier management (international), inventory planning
- Reporting, preparation of forecasts, database creation
- Preparing cost analyses, cost reduction measures
- Contract negotiations, process optimization, contract management
Aug 2015 - Nov 2015
4 monthsFriedrichsdorf, Germany
Buyer
peiker acustic GmbH & Co. KG
- Procurement of, e.g., mechanical components, raw materials (international)
- Supplier management (international), warehouse planning, “extended workbench”
- Monitoring delivery dates, reporting, preparation of forecasts
Jan 2015 - Jul 2015
7 monthsSteinbach, Germany
Buyer
Krone GmbH
- Procurement of e.g. services, temporary staffing, office supplies, packaging materials, IT, clothing, mobile communications
- Supplier management (international), warehouse planning
- Fleet management (planning, contract management, procurement, monitoring, fuel card administration, leasing processing, vehicle branding)
- Implementation of a company car driver policy
- Development and implementation of a company car management system
- Optimization of the internal ordering process
Oct 2012 - Dec 2014
2 years 3 monthsKronberg, Germany
Junior Buyer
Accenture Services GmbH
- Analysis, evaluation and optimization of the purchasing department
- Supplier management (international)
- Compliance implementation and monitoring
- Support for the introduction/improvement of the ERP system
- Contract management and tenders (general)
- Procurement of e.g. services, IT, business supplies
Feb 2011 - Oct 2012
1 year 9 monthsGöttingen, Germany
Purchasing Clerk
Deutsches Primatenzentrum Göttingen GmbH
- Procurement of e.g. laboratory supplies, service and protective clothing, animal feed, office supplies under VOB and VOL regulations
- Monitoring delivery dates and analyzing offers
- Inventory management and planning
Summary
I have extensive experience in driving strategic procurement, managing supplier relationships and leading transformation projects across various sectors, from energy and defense to digital technology. I specialize in integrating M&A processes, digitalizing procurement systems and optimizing contracts and cost analyses. My work has consistently delivered efficiency improvements and cost savings through streamlined process management and the adoption of eProcurement solutions.
My entrepreneurial mindset, shaped by founding technology initiatives in supply chain management, complements my hands-on approach gained over years of interim assignments and consulting. I bring a pragmatic perspective focused on simplifying complex processes and improving operational resilience while delivering measurable results.
Languages
German
NativeEnglish
AdvancedFrench
ElementaryLuxembourgish
ElementaryEducation
Oct 2008 - Jun 2010
Grünes Auto Göttingen - Andreas Schmidt & Michael Patscheke GbR
Office Communication Clerk (IHK) · Göttingen, Germany
Oct 2006 - Jun 2007
Business Vocational School
Göttingen, Germany
Oct 2000 - Jun 2006
Comprehensive School
Secondary School Certificate · Göttingen, Germany
Certifications & licenses
Office Communication Clerk
IHK
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