Freelancer profile translated to English.

Description

Interim CTO & Enterprise Architecture Advisor

I support companies as an Interim CTO and Senior Advisor when critical IT and technology projects need to become decidable, controllable, and implementable again. Especially in complex organizations, regulated environments, or strategic programs.

Typical reasons for engaging me:

unclear IT strategy, cloud or platform decisions
lack of IT governance in transformation and scaling phases
increasing cost, audit or regulatory pressure (KRITIS, Public)
programs or development organizations in distress

My Added Value

I act specifically as an Interim CTO or Enterprise Architecture Advisor to:

translate IT strategies into achievable target images and roadmaps
establish Enterprise Architecture Management (EAM, SAP LeanIX) as a control instrument
build decision-making and governance structures
make organizations, programs, and teams capable of action again

I combine strategy, technology, architecture, and organization into implementable solutions.

Typical Project Types

Interim CTO & IT Transformation
IT Strategy & Enterprise Architecture Management
IT Governance & Decision Support
Cloud Strategy & Cloud Cost Optimization (FinOps)
IT Compliance in Regulated Environments (KRITIS, Public)
Stabilization and Performance Optimization of Development Organizations

Approach & Results

Decision-making and implementation architectures instead of pure concept work
Clear prioritization and transparency for management and stakeholders
Close collaboration with IT management, architecture, and delivery teams
Sustainable solutions with measurable impact

Programs up to approx. 250 FTE and €20 million budget, direct budget responsibility up to approx. €5 million.

Role & Expectation

I act in roles such as Interim CTO, Transformation Lead, or Senior Advisor -

with a focus on decision-making capability, implementability, and sustainable impact.

Industry field of expertise

Languages

German
Native or bilingual
English
Fluent

Workplace preferences

Can work on-site

Heidelberg (up to 50km), Frankfurt am Main (up to 20km), Darmstadt (up to 20km), Mannheim (up to 20km), Karlsruhe (up to 20km)

treeline Consulting GmbH
Interim CTO & Transformation Lead
September 2021 - Today (4 years and 11 months)
Heidelberg, Germany
Several clients & mandates in medium-sized businesses, regulated markets, and the public sector. Acting as Interim CTO, Transformation Lead, and Advisor in critical decision-making and implementation phases.
Development and implementation of IT strategies
Establishment of Enterprise Architecture Management
Building IT governance and decision-making structures
Management of IT transformations and programs
Development of cloud strategies including cost and risk reduction
Close collaboration with management, IT leadership, and teams
IT Strategy Cloud Strategy CTO IT Transformation Enterprise Architecture Management
Verteilnetzbetreiber (KRITIS / Energie)
Strategic IT & Cloud Transformation (C-Level)
ENERGY AND UTILITIES
August 2022 - October 2023 (1 year and 2 months)
Strategic cloud transformation, architecture, and decision-making in a critical platform and cloud setup under stringent regulatory requirements (KRITIS).
Establishment of IT governance and decision-making structures
Derivation of a viable IT and cloud strategy
Ensuring IT compliance and regulatory traceability
Cloud cost optimization / FinOps with measurable impact (>30%)
Decision and implementation support for the board and supervisory board
KRITIS FinOps Cloud Platforms Cloud Governance Cloud Strategy
IHK DIGITAL GmbH
Chief Technology Officer (Interim)
PUBLIC SECTOR
December 2023 - March 2025 (1 year and 3 months)
Berlin, Germany
Interim CTO in a highly regulated, federal digital environment with responsibility for architecture, cloud, and control structures.
Building a CTO Office (Enterprise Architecture Management, Architecture Governance, Architecture Team, SAP LeanIX)
Definition and implementation of the IT strategy
Establishment of IT governance structures
Program and project planning and monitoring (up to ~250 FTE)
Ensuring IT compliance and audit readiness
Management of external development and cloud partners
Enterprise Architecture Management Cloud Governance IT Governance IT Compliance Project Planning & Control