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Hi, I’m Mark Regenass, a Data and Domain Modeller with 25+ years of experience translating complex business domains into precise, implementable data structures. My work spans conceptual modelling (UML, ERD, OWL), logical data design, and full-stack.NET implementation, with a consistent focus on regulated environments where structural correctness is non-negotiable. I’ve frequently acted as a practitioner in GxP contexts, understanding the underlying validation rationale and how data architecture supports compliant workflows. I also integrate AI-assisted tooling (Claude Code) into the development workflow to reduce overhead without compromising specification quality. I’m available for remote DACH mandates and hybrid engagements in the Basel / NW Switzerland region, with a preferred utilisation of 60% (scalable to 100% for project-critical phases). This is an IC role with no people management responsibility.…Hi, I’m Mark Regenass, a Data and Domain Modeller with 25+ years of experience translating complex business domains into precise, implementable data structures. My work spans conceptual modelling (UML, ERD, OWL), logical data design, and full-stack.NET implementation, with a consistent focus on regulated environments where structural correctness is non-negotiable. I’ve frequently acted as a practitioner in GxP contexts, understanding the underlying validation rationale and how data architecture supports compliant workflows. I also integrate AI-assisted tooling (Claude Code) into the development workflow to reduce overhead without compromising specification quality. I’m available for remote DACH mandates and hybrid engagements in the Basel / NW Switzerland region, with a preferred utilisation of 60% (scalable to 100% for project-critical phases). This is an IC role with no people management responsibility.

Mark Regenass

Full Stack Developer, Data Scientist, Data Analyst, +3

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Hi, I’m Mark Regenass, a Data and Domain Modeller with 25+ years of experience translating complex business domains into precise, implementable data structures. My work spans conceptual modelling (UML, ERD, OWL), logical data design, and full-stack.NET implementation, with a consistent focus on regulated environments where structural correctness is non-negotiable. I’ve frequently acted as a practitioner in GxP contexts, understanding the underlying validation rationale and how data architecture supports compliant workflows. I also integrate AI-assisted tooling (Claude Code) into the development workflow to reduce overhead without compromising specification quality. I’m available for remote DACH mandates and hybrid engagements in the Basel / NW Switzerland region, with a preferred utilisation of 60% (scalable to 100% for project-critical phases). This is an IC role with no people management responsibility.…Hi, I’m Mark Regenass, a Data and Domain Modeller with 25+ years of experience translating complex business domains into precise, implementable data structures. My work spans conceptual modelling (UML, ERD, OWL), logical data design, and full-stack.NET implementation, with a consistent focus on regulated environments where structural correctness is non-negotiable. I’ve frequently acted as a practitioner in GxP contexts, understanding the underlying validation rationale and how data architecture supports compliant workflows. I also integrate AI-assisted tooling (Claude Code) into the development workflow to reduce overhead without compromising specification quality. I’m available for remote DACH mandates and hybrid engagements in the Basel / NW Switzerland region, with a preferred utilisation of 60% (scalable to 100% for project-critical phases). This is an IC role with no people management responsibility.

Available to hire

Hi, I’m Mark Regenass, a Data and Domain Modeller with 25+ years of experience translating complex business domains into precise, implementable data structures. My work spans conceptual modelling (UML, ERD, OWL), logical data design, and full-stack.NET implementation, with a consistent focus on regulated environments where structural correctness is non-negotiable. I’ve frequently acted as a practitioner in GxP contexts, understanding the underlying validation rationale and how data architecture supports compliant workflows.

I also integrate AI-assisted tooling (Claude Code) into the development workflow to reduce overhead without compromising specification quality. I’m available for remote DACH mandates and hybrid engagements in the Basel / NW Switzerland region, with a preferred utilisation of 60% (scalable to 100% for project-critical phases). This is an IC role with no people management responsibility.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Language

German

Fluent

English

Fluent

Work Experience

Data & Domain Modeller / .NET Full Stack Developer (Self-Employed) at Regenass Informatik GmbH / liquid-s GmbH (Self-Employed)

January 1, 2025 - Present

Available for consulting mandates in data modelling, domain architecture, and .NET full stack development within regulated and enterprise environments. Side Project – GxP Specification Tooling: Spec-driven artefact management targeting GAMP 5 traceability; .NET 10, Blazor, SQL Server with MCP server integration for AI-assisted specification workflows.

Data-, Solution- & Enterprise Architect at t2b AG

October 1, 2016 - January 1, 2025

Lead architect and modeller across enterprise and regulated-domain client engagements. Primary focus: data/domain modelling, logical data architecture, system integration design.

Data Architect (Roche PTE) at Roche PTE (Client)

January 1, 2024 - December 31, 2024

Logical data model for Supply Chain Risk Data Product; supported data engineers mapping raw source to a logical Data Vault structure.

System & Data Architect at BIT

January 1, 2021 - December 31, 2024

Lead Data Architect for federal B2B-Gateway programme. Conceptual data models, business glossaries, user role concepts.

Knowledge Modeller at Novartis Data Governance

January 1, 2019 - December 31, 2021

Knowledge Graph for Clinical Operations Metadata; end-to-end traceability; supporting data pipelines.

Domain Modeller at Roche Diagnostics & Pharma

January 1, 2016 - December 31, 2019

Deep-dive domain models for API contracts, clinical milestone state diagrams.

Contributor – Thalbus Enterprise AI Platform at t2b AG (Internal)

January 1, 2024 - December 31, 2025

Delivered Blazor-based chatbot frontend, Thalbus/Confluence integration, and Onion Architecture refactoring of the Thalbus server (.NET, Python).

IT Consultant / Developer at itsystems AG

January 1, 2011 - September 30, 2016

SharePoint and Matchpoint development (.NET, HTML, JavaScript, CSS). SQL Server / T-SQL data migration for a private equity investments firm.

Founder & Independent Consultant at Regenass Informatik GmbH / liquid-s GmbH

January 1, 1998 - December 31, 2011

Independent architect and developer for enterprise clients. Novartis: Canonical data models for ESB integration services; DSM: Domain model and database for natural product isolation management; UBS: Document archiving system design and implementation.

Data & Domain Modeller / .NET Full Stack Development at Self-Employed

January 1, 2025 - Present

Independent consultant providing data/domain modelling and .NET full-stack development for regulated environments. Side project includes GxP Specification Tooling: spec-driven artefact management and AI-assisted specification workflows (Claude Code integration).

Data Architect at t2b AG

October 1, 2016 - January 1, 2025

Lead architect and modeller for enterprise and regulated-domain client engagements. Responsibilities included conceptual data models, business glossaries, user role concepts, data integration design, and end-to-end traceability for programs (e.g., Roche PTE).

Independent Architect / Consultant at Regenass Informatik GmbH / liquid-s GmbH

January 1, 1998 - January 1, 2011

Independent architect and developer for enterprise clients. Canonical data models for ESB integration services; domain model and database design for natural product isolation management; IBM/Swiss-based client projects including Novartis, UBS.

Data & Domain Modelling / .NET Full Stack Development at Self-Employed

January 1, 2025 - Present

Available for consulting mandates in data modelling, domain architecture, and .NET full-stack development within regulated and enterprise environments. Side Project – GxP Specification Tooling: Spec-driven artefact management targeting GAMP 5 traceability. .NET 10, Blazor, SQL Server with MCP server integration for AI-assisted specification workflows. Engineering exercise with transferable applicability to GxP validation projects.