Dennis Roßbach - Interim Senior Strategic Buyer

Schifflange, Luxembourg

Experience

Jan 2025 - Jun 2025

6 months

Hamburg, Germany

Interim Senior Strategic Buyer

Wintershall Dea International GmbH

Integration and transformation after an acquisition (M&A)
Supplier management, contract negotiations, process support
Contract redesign and transfer

Dec 2024 - Present

1 year 2 months

Brussels, 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 months

Kassel, 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 - Present

2 years 6 months

Brussels, Belgium

Freelance Expert

European Commission

Technical due diligence of a blockchain and AI application
Evaluation of the SaaS solution in supply chain and procurement
Report creation
Project- and hourly-based work

Feb 2023 - Present

3 years

Luxembourg

Founder & Managing Director

Supplier Sentinel Sàrl

Technology development for purchasing and logistics
Development of a web app for supplier risk management
Digitization of procurement processes

Jan 2023 - Dec 2023

1 year

Kassel, Germany

Interim Senior Tactical Buyer

Wintershall Dea AG

Procurement of software and licenses as well as managed services
Supplier management, contract negotiations, process optimization
Spend analysis, forecasting, digitalization, tenders

Aug 2022 - Dec 2022

5 months

Hamburg, Germany

Interim Senior Strategic Buyer

NVL B.V. & Co. KG

Procurement of licenses (SaaS, cloud, on-premise) and managed services
Risk management, contract negotiations, process optimization
Spend analysis, forecasting, digitalization

Jan 2022 - Oct 2022

10 months

Landau, Germany

Interim Senior Strategic Buyer

Progroup AG

Procurement of hardware, software, and licenses (SaaS, cloud)
Tender management, contract negotiations, process optimization
Spend analysis, forecasting, digitalization, managed print services

Jul 2021 - Dec 2021

6 months

Kitzingen, Germany

Interim Senior Strategic Buyer

Knauf Gips KG

Procurement of software and licenses (SaaS, cloud)
Tender management, contract negotiations, process optimization
Spend analysis, forecasting, digitalization

Aug 2019 - Jun 2020

11 months

Luxembourg

Interim Senior Strategic Buyer

DuPont De Nemours SARL

Procurement of production materials, indirect and direct
'Extended workbench' controls, rework, finishing
Contract drafting including negotiations and purchasing-side optimizations

May 2019 - Present

6 years 9 months

Luxembourg

Founder & Managing Director

SYBX Group Sàrl

Strategy, interim management, digitalization, consulting
Trainer in fire protection between July 2020 and June 2021, e.g. for the DEKRA Academy

Jun 2018 - Apr 2019

11 months

Frankfurt, Germany

Senior Operational Buyer

BNP Paribas S.A.

Procurement of professional services, IT hardware and software
Business continuity management and contract management including digitalization
Forecasting and analyses, tenders and negotiations
Implementation of new processes and tools (e-invoicing, etc.)

Jan 2016 - Dec 2018

3 years

Steinbach, Germany

Founder & Managing Director

Shiny Box GmbH

Car care products online shop
Part-time from January 2016 to May 2017 and from June 2018 to December 2018
Marketing, sales, product management, procurement of raw materials

Dec 2015 - May 2017

1 year 6 months

Oberursel, Germany

Buyer

Rolls-Royce Deutschland Ltd & Co KG

International procurement of engine components and raw materials
Supplier management, inventory planning
Reporting, creating forecasts, database creation
Cost analyses and cost reduction measures
Contract negotiations, process optimization, contract management

Aug 2015 - Nov 2015

4 months

Friedrichsdorf, Germany

Buyer

peiker acustic GmbH & Co. KG

International procurement of mechanical components and raw materials
Supplier management, warehouse planning, 'extended workbench'
Monitoring delivery dates, reporting, creating forecasts

Jan 2015 - Jul 2015

7 months

Steinbach, Germany

Buyer

KRONE GmbH

Procurement of services, temporary work, office supplies, packaging materials, IT, clothing, mobile communications
Supplier management, inventory planning
Fleet management: planning, contract management, procurement, monitoring, fuel card administration, lease processing, vehicle graphics
Implementation of a company car driver policy and a fleet management system
Optimization of the internal ordering process

Oct 2012 - Dec 2014

2 years 3 months

Kronberg, Germany

Junior Buyer

Accenture Services GmbH

Analysis, evaluation and optimization of the purchasing department
International supplier management
Implementation and monitoring of compliance
Support for the introduction and improvement of the inventory management system
Contract management and tenders
Procurement of services, IT and business supplies

Feb 2011 - Oct 2012

1 year 9 months

Göttingen, Germany

Procurement Clerk

Deutsches Primatenzentrum Göttingen GmbH

Procurement of lab materials, work and protective clothing, animal feed and office supplies under VOB and VOL
Monitoring delivery dates and evaluating offers
Inventory management and planning