About my services
Who I am
As a Senior IT Project Manager fluent in German, English, and Spanish, I bring over 15 years of international experience bridging cultures and leading global teams. My focus is on fostering collaboration across continents and developing structured methodologies that enable faster, more predictable SAP S/4HANA transformations.
What I deliver
I specialize in end‑to‑end SAP S/4HANA cutovers, data migrations, and hypercare exits, leading global, remote‑first teams. My consulting expertise lies in project management and SAP cutover governance, supported by proprietary methodologies that ensure structured rollouts and full transparency through KPI‑driven dashboards.
Why it matters
By combining language fluency with agile governance and data‑driven decision‑making, I eliminate communication barriers and accelerate project lifecycles. Stakeholders gain clarity, risks are reduced, and business‑as‑usual resumes faster – regardless of where teams are located.
Professional Summary
Senior IT Project Manager and SAP Cutover Lead with over 15 years of cross‑industry experience managing complex implementations, migrations, and integration projects across Europe and Latin America. Recognized for delivering mission‑critical rollouts under pressure, coordinating distributed stakeholders, and steering hybrid technical and business environments.
Proven track record in remote project leadership, cutover orchestration across SAP S/4HANA landscapes, and strong vendor/partner alignment. Passionate about optimizing digital business processes and fostering cross‑border team collaboration.
Experience
Senior IT Project Manager & Cutover Lead | Founder, GESWO – Encarnación, Paraguay (mainly remote work) | 06/2025 – present
- Leading projects in SAP Cutover Management and digital transformation with a focus on structured methodologies and global collaboration.
- Founder of GESWO, an editorial and consulting initiative based in Paraguay, combining publishing and IT project expertise.
- Author of the reference book SAP Cutover Management – Matrix, Methods and Best Practices, soon to be published in English.
👉 Take a look at my latest book on Cutover Management (see right), which will also be available in English shortly.
Program Manager Cognizant – Hamburg, Germany (mainly remote work) | 08/2019 – 05/2025
Core Responsibilities
- Management of complex international projects and programs in SAP S/4HANA (Brownfield & Greenfield) and ServiceNow®, covering the full project lifecycle (Discover, Prepare, Explore, Realize, Deploy, Run) in the EU and Saudi Arabia.
- Developed and rolled out Cognizant’s SAP Activate® interpretation and Focused Build® methodology in test management and rollout governance.
- Led multi‑vendor/offshore teams (India), achieving 15% cost reduction through process and resource optimization.
- Directed complex system integration tests, including test strategy and tool implementation.
- Business development and presales (initial assessments, pre‑projects).
Selected Projects
- Refresco (Retail) – UK | 12/2024 – 05/2025 Managed the realization phase of a Greenfield implementation with multi‑vendor offshore teams.
- SEFE (Energy) – Germany | 06/2024 – 11/2024 Directed a ServiceNow® implementation project.
- Refresco (Retail) – Rotterdam, Netherlands | 08/2022 – 05/2024 Overall delivery responsibility for the Aspire Brownfield Conversion Program, focusing on business process harmonization, process improvement, and master data standardization. Supported by a new digital framework with one core SAP S/4HANA system. Refresco is the world’s largest independent bottler of beverages for leading retailers and A‑brands, with production facilities in Europe, North America, and Mexico.
- Public Sector – Jeddah, Saudi Arabia | 01/2021 – 07/2022 Introduced and rolled out SAP Focused Build® as a test management solution for a Brownfield conversion project. Activities included SOW negotiations, stakeholder management, test strategy creation, training/workshops, integration test planning and execution, and KPI definition.
- Merck (Chemical & Pharmaceutical) – Mannheim, Germany | 01/2020 – 06/2020 Implemented a cutover methodology for the joint commissioning of four major SAP projects.
Project Manager ad-interim T.CON GmbH & Co. KG – Hamburg, Germany | 07/2018 – 04/2019
- Orchestrated the restart of a stalled SAP implementation for a mechanical‑engineering client by redefining the project baseline, revising cost forecasts, and rebuilding the MS Project® schedule with earned‑value tracking.
- Rebalanced cross‑functional team workloads and standardized delivery tracking, restoring project progress within months.
- Transformed JIRA from a generic ticket system into a defect‑centric integration‑test management tool, significantly improving error traceability and resolution efficiency.
IT Project Manager OTTO GmbH & Co. KG (Retail Industry) – Hamburg, Germany | 02/2012 – 06/2018
Core Responsibilities
- Cutover Management: Built and executed a reusable Cutover Framework across multiple SAP and non‑SAP releases—from go‑live strategy and dependency workshops to KPI‑driven test cycles and hypercare. Culminated in a peer‑reviewed publication: Nageldinger G. (2015): A Framework for Cutover Management. PeerJ Computer Science: e29 https://doi.org/10.7717/peerj-cs.29
- IT Service Transition & Improvement: Directed end‑to‑end transition planning, change and release management, service validation/testing, and continuous improvement (PDCA) for critical IT services.
- Project Portfolio Oversight: Supervised diverse internal initiatives, aligned cross‑functional teams, and ensured on‑time, on‑budget delivery.
Selected Projects
- Category Management Automation (Jan 2017–Jun 2018): Conducted supplier evaluations and developed POC/ROI business cases, achieving cost savings of over €7M.
- Logistics KPI Framework (Oct 2017–Dec 2017): Designed and deployed automated KPI dashboards, reducing downtime by 20% through real‑time alerts.
- Product Data Model Optimization (Mar 2017–Sep 2017): Architected a streamlined product data model, improving data consistency and cross‑team collaboration.
Previous roles
Consultant and Senior Consultant at SAP AG (06/2005 – 06/2009) and SAP SI (01/1999 – 06/2005). Responsible for international projects with clients including: SAB Miller (Beverage Industry, Colombia), ExxonMobil (USA), NIS (Serbia), TNK‑BP (Russia), Pemex Gas (Mexico) and Orbian (United Kingdom).
Frequently asked questions
Key information for international clients