Mark W.-IT Manager | Data Scientist | AI & Machine Learning Engineer
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Experience
IT Manager
WESSLING Consulting Engineering
- Overall responsibility for IT strategy and IT operations, reporting directly to the executive management.
- Implementation of business requirements as production-ready solutions within a few days, supported by practical data science experience and expertise from the energy sector.
- Led the IT carve-out of a medium-sized company: separation of infrastructure, systems, and contracts into an independent IT organization.
- End-to-end responsibility for IT infrastructure: hardware procurement, cloud services (including GPU resources), and networking.
- Selected and introduced a new ERP system together with the executive management.
- Managed external MSPs and service providers, including contract, SLA, and license management.
- Responsible for IT security, GDPR compliance, backup, and business continuity; provided IT support for ISO 9001 certification.
- IT budget planning and cost optimization.
Business Intelligence / Data Science
Outlaw gGmbH
Non-profit provider of child and youth welfare services (daycare centers, youth work, family support) with highly sensitive data relating to minors.
- Designed and introduced a fully self-hosted AI assistant (similar to ChatGPT) with locally operated LLMs through OpenWebUI. Sensitive data relating to children, families, and cases never left the company’s own infrastructure — a strict requirement under GDPR and child data protection regulations that ruled out cloud AI services.
- Built an agentic RAG system on the same on-premise stack (Qdrant vector database, FastAPI inference endpoints), making internal knowledge searchable for educational professionals and social workers without sharing data with third parties.
- Migrated over 2,000 applications from a legacy system to a modern API-based platform — with lower software costs and AI-supported recruiting processes under the same data protection requirements.
- Introduced engineering best practices: unit tests, code reviews, and CI quality gates.
Data Scientist
m2hycon GmbH
- Developed algorithms for detecting faults in industrial machines using classification models and maintained neural networks for time series data.
- Developed well-tested code for reliable and scalable software.
- Operated and maintained services with Kubernetes, Docker, FastAPI, and Grafana monitoring.
- Wrote blog posts and technical reports on time series analysis and machine learning in industry.
Data Scientist
ROSEN Group
- Designed and applied methods for extracting information from sensor data.
- Developed algorithms and testing procedures using machine learning, deep learning, and statistical methods for integration as Minimum Viable Products (MVPs).
- Worked with Azure DevOps and Git in an agile development environment.
Master's Thesis
ENERCON
- Implemented a computationally efficient aerodynamic model (Lifting-Line Theory / Free Wake), contributing to lower development costs for new wind turbines.
- Analyzed and visualized large datasets from turbine operations and 3D CFD simulations using Python (Pandas, NumPy), Tecplot, and ParaView.
- Defined technical best practices for the Lifting-Line-Free-Wake model and shared them with the team.
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Energy, Manufacturing, Information Technology, Professional Services, and Education.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Product Development, Procurement, Project Management, Strategy, and Business Intelligence.
Summary
Data Scientist and IT lead with over 5 years of experience turning industrial and business data into production-ready solutions. Strong knowledge of machine learning as well as time series and sensor data analysis in the energy and industrial sectors, combined with practical experience operating privacy-compliant, self-hosted AI systems (local LLMs, agentic RAG) and taking overall responsibility for IT strategy, infrastructure, and operations.
Skills
Ai & Ml
- Machine Learning
- Deep Learning
- Time Series Analysis
- Predictive Maintenance
- Llms
- Agentic Rag
- Openwebui
- Qdrant
Programming & Data
- Python (Pandas, Numpy)
- Fastapi
- Tecplot
- Paraview
Devops & Infrastructure
- Kubernetes
- Docker
- Grafana
- Azure Devops
- Git
- Ci/Cd
- Cloud And Gpu Resources
- Networking
It Management
- It Strategy
- It Carve-Outs
- Erp Selection
- Vendor/Msp And Sla Management
- Budgeting
- It Security
- Gdpr
- Iso 9001
Languages
Education
Carl von Ossietzky Universität Oldenburg
M.Sc. European Master in Renewable Energy (EUREC) · Renewable Energy · Oldenburg, Germany
Nationale Technische Universität Athen
Wind Energy · Athens, Greece
Bowen University
B.Sc. Physics · Physics · Iwo, Nigeria · Second Class Upper Division
Statistics
Experience
Global experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
Mark is based in Berlin, Germany.
Mark speaks the following languages: German (Advanced), English (Advanced).
Mark has at least 6 years of experience. During this time, Mark has worked in at least 4 different roles and for 5 different companies. The average length of individual experience is 1 year and 3 months. Note that Mark may not have shared all experience and actually has more experience.
Based on recent experience, Mark would be well-suited for roles such as: IT Manager, Business Intelligence / Data Science, Data Scientist.
Mark's most recent position is IT Manager at WESSLING Consulting Engineering.
In recent years, Mark has worked for WESSLING Consulting Engineering, Outlaw gGmbH, m2hycon GmbH, and ROSEN Group.
Mark is most experienced in industries like Energy, Manufacturing, and Information Technology. Mark also has some experience in Professional Services and Education.
Mark is most experienced in business areas like Information Technology, Product Development, and Business Intelligence. Mark also has some experience in Procurement, Project Management, and Strategy.
Mark has recently worked in industries like Energy, Manufacturing, and Information Technology.
Mark has recently worked in business areas like Information Technology, Product Development, and Procurement.
Mark holds a Master in Renewable Energy from Carl von Ossietzky Universität Oldenburg and a Bachelor in Physics from Bowen University.
Mark will be available part-time from October 2026.
Daily rate distribution
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Average rates for similar positions
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The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 6 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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