Dennis B.-Interim CTO
Check rate
Experience
Interim Transition Manager
IT Carve-out
Chemical industry (500 employees)
- Completed the infrastructure separation from the former US parent company within the TSA deadline
- Successfully completed the tenant-to-tenant migration of Microsoft 365 for all 500 users: from the former parent company's tenant to the newly established company's own tenant (Exchange Online, SharePoint, Teams)
- Separated the network (LAN/SD-WAN), Active Directory and server infrastructure
- Negotiated IT service contracts through a structured tender process
- Initiated cyber security measures
- Supported the selection of service providers for data protection and NIS2 certification
Interim Program Manager
Data Center Move
Staffing provider (placement of industrial workers, 100 employees)
- Led the relocation of the entire IT server operation to a new provider: migrated 20 VMware VMs and one AS/400 system, completing the cut-over within the 3-month deadline
- Managed escalation across both service providers, ensuring a smooth cut-over
- Advised executive management on the further development of the strategic IT landscape
Interim CTO
IT Carve-out
Manufacturing industry (steel processing, 70 employees)
- Took over IT responsibility from the parent company and implemented the complete IT separation within the carve-out deadline (TSA)
- Implemented the tenant-to-tenant migration of Microsoft 365 for all 70 users (100%): from the parent company's tenant to the newly established company's own tenant (Exchange Online, SharePoint, Teams including telephony)
- Separated the network (LAN/SD-WAN), Microsoft Active Directory and server environment from the parent company – partly separated and partly rebuilt for the independent company
- Created IT service descriptions and conducted the tender for IT service contracts
- Established ITIL-based IT operations and ensured the stable operation of the IT infrastructure
- Reduced IT costs through targeted efficiency measures
- Advised executive management on the development of the strategic IT landscape
Interim Program Manager
IT Carve-out
Staffing provider (placement of industrial workers, 100 employees)
- Advanced the IT separation from the former parent company and met the TSA deadline
- Implemented the tenant-to-tenant migration of Microsoft 365 for all 100 users (100%): from the former parent company's tenant to the newly established company's own tenant (Exchange Online, SharePoint, Teams including telephony)
- Separated the network (LAN/SD-WAN), Active Directory and server infrastructure and rebuilt it as a fully independent environment
- Managed IT service descriptions and negotiated IT service contracts through a structured tender process
- Established ITIL-based IT operations and stabilized ongoing IT operations
- Implemented cost-efficiency measures in the new IT setup
Interim CTO
Automotive supplier
IT Carve-out
Automotive supplier (automotive and vehicle manufacturing, 250–500 employees)
- Built an independent IT organization from the ground up across four companies in DE/UK/China as part of a complete IT carve-out
- Implemented the tenant-to-tenant migration of Microsoft 365 for 250 users from the parent company's tenant to the new independent tenant across all four companies (Exchange Online, SharePoint, Teams including telephony)
- Separated the LAN/SD-WAN network, Microsoft Active Directory and server environments across all four companies and rebuilt them where required
- Completed the IT separation from the parent company on schedule within the TSA deadline
- Managed the IT service description and awarded IT service contracts to new providers through a tender process
- Established ITIL-based IT operations across all four companies and ensured the stable operation of the IT infrastructure
- Advanced cost-efficiency measures in the newly built IT landscape
Interim COO
FTTH-Bauunternehmen
Crisis Management
FTTH construction company (telecommunications, 50 employees)
- Took on operational responsibility during an acute crisis: conducted due diligence of the NE3 business unit and identified structural deficiencies
- Implemented structural measures to improve quality and introduced central escalation management
- Negotiated new framework and individual contracts for commissioning subcontractors and digitized contract management (with DocuSign)
- Set up the migration to the Microsoft 365 Cloud (MS Teams/SharePoint) as part of the company’s digitalization
- Advised management on all crisis management matters
- Recruited external construction managers and working students
Interim Agile Lead / Change Manager
Internationaler Telekommunikationsanbieter
Change Management
International telecommunications provider (telecommunications, 1,000–5,000 employees)
- Advanced the transformation into an agile organization and defined the implementation roadmap
- Coached program management and stakeholders on understanding and applying agile methods to complex tasks
- Developed specific improvement measures for agile ways of working and coordinated their implementation
- Built a framework for measuring, reporting and tracking activities related to agile ways of working
- Managed the transformation work, ensuring adherence to deadlines, quality and added value
Angel Investor and Advisor
living brain GmbH
- Supported the company as an Angel Investor and Advisor, contributing knowledge and experience in General Management and organizational development
- Managed the backend development project through an external nearshore partner
- Developed business development and sourcing strategies for national and international supply chains
Angel Investor and Advisor
GarantieHeld UG
- Supported the company as an Angel Investor and Advisor, contributing knowledge and experience in business development (e.g. B2B, B2C, UX/CX)
- Acted as a sparring partner for the founders in General Management, business planning, recruiting and stakeholder management
- Successfully organized the pre-seed funding round as Lead Investor
- Mentored the founders on business design and planning, pitching and investor acquisition
Vice President
Deutsche Telekom IoT GmbH
Restructuring/Transformation: Service Management
Internet/Information Technology (250–500 employees)
- Managed IoT Customer Success Management with a focus on developing the existing customer business
- Transformed classic Service Management into customer-centered Customer Success Management focused on the Customer Experience
- Project focus: sustainable customer retention and revenue growth
Vice President
T-Systems International GmbH
International IoT Delivery & Outsourcing to CEE and APAC
Internet/Information Technology (> 10,000 employees)
- Responsible for the international delivery of IoT products with a focus on Customer Experience: customer onboarding, professional project management, operations, service and quality assurance through to maintaining long-term customer relationships
- Relocated 10 role types (approx. 50 FTE) to nearshore/offshore locations in cooperation with the country organizations in CEE and APAC
- Implemented the related personnel reorganization as part of the company-wide restructuring
Vice President
T-Systems International GmbH
Introduction of a cross-functional agile organization
Internet/Information Technology (> 10,000 employees)
- Introduced a cross-functional agile organization as part of a company-wide restructuring, defined new role profiles and negotiated them with the works council
Vice President
Deutsche Telekom AG
Head of the Mobile Payment & mCommerce Business Unit
Telecommunications (> 10,000 employees)
- Led the Mobile Payment & mCommerce Solutions business unit with 60 employees: strategic direction, sales & business development, product development and operations
- Represented Deutsche Telekom on Mobile Payment at the GSMA (Groupe Spécial Mobile Association)
- Discontinued the product following a strategic group decision and implemented a socially responsible personnel restructuring
Vice President
Deutsche Telekom AG
Design and implementation of a flexible, agile organization
Telecommunications (> 10,000 employees)
- Built an organization that enables teams to flexibly scale in size and capabilities – serving as a blueprint for the reorganization of Telekom’s innovation division (including works council negotiations)
Senior Vice President Product Design
Deutsche Telekom AG
Interim Management
Telecommunications (> 10,000 employees)
- Took on interim responsibility at short notice for the design of all products and the design portfolio of the Telekom Group (industrial, interaction and image design)
Vice President
Deutsche Telekom AG
Reorganisation of the Online Marketing Division
Telecommunications (> 10,000 employees)
- Reorganised the Online Marketing Division of the Products & Innovation division into a project-oriented business, product and network support unit
Vice President
Deutsche Telekom AG
Organisation Building & Outsourcing to CEE: Establishment of Vendor Management
Telecommunications (> 10,000 employees)
- Built a vendor management landscape and implemented a nearshore outsourcing strategy (CEE) for the Products & Innovation division
Head of Region
T-Systems International GmbH
Regional Management: Operational Services Europe (WE/CEE)
Internet/Information Technology (> 10,000 employees)
- Managed all operating system services units of T-Systems' country subsidiaries in the WE/CEE region within the Global Delivery Unit
Member of the Management Board
T-Systems Slovakia s.r.o.
Foundation and Development of a Country Subsidiary in Košice (Slovakia)
Internet/Information Technology (500–1,000 employees)
- Founded T-Systems Slovakia as a greenfield company and grew it from zero to approximately 700 employees within four years
- Built and managed nearshore operations for monitoring and system administration of enterprise server solutions, data (storage and backup), and network/firewall infrastructure
- Responsible for project management, recruiting, organisational and leadership development, and employee retention
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Information Technology, Telecommunication, Professional Services, Automotive, Manufacturing, and Transportation.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Project Management, Strategy, Procurement, Human Resources, and Supply Chain Management.
Summary
Interim CTO/COO for IT carve-outs, restructurings and digital turnarounds. More than 20 years of leadership responsibility at executive management and P&L level in international corporations (Deutsche Telekom, T-Systems). Founded T-Systems Slovakia and scaled it from zero to approx. 700 employees.
Deep expertise in complex ICT programs, post-merger IT separation and nearshore/offshore sourcing, including the design and establishment of operating and service structures based on ITIL. Industries: telecommunications, automotive, manufacturing, IT services.
Skills
- It Service Management / Itil: 25+ Years Of Experience Designing And Operating Itil-Based It Operations Organizations To Optimally Support Business Processes
- Outsourcing / Supplier Management: Increased Efficiency Through Procurement Optimization And Nearshore/Offshore Sourcing (Cee/Apac)
- Change, Transformation / Restructuring: >15 Years Of Experience With Organizational, Cultural And Business Change; Personnel Development And Restructuring For Up To Approx. 1,000 Employees
- Intercultural Competence: >20 Years Of Experience Working With International Teams, Including 4 Years Abroad (Slovakia)
- It Carve-Out / Post-Merger Separation: Managed Several Complete It Separations From Parent Companies: Lan/Sd-Wan, Active Directory And Servers (Separated Or Newly Built), Including Across Four Companies (De/Uk/China); Tenant-To-Tenant M365 Migrations For 70–250 Users Within Tsa Deadlines
- Program / Project Management: 25+ Years Of Experience Managing Complex (Ict) Programs And Projects
- Management / (Agile) Leadership: >20 Years Of Disciplinary Leadership Experience In An International Corporate Environment; Led Organizations With Up To Approx. 700 Employees (Built T-Systems Slovakia From The Ground Up)
- Customer Success Management: Customer-Focused Onboarding, Customer Retention And Revenue Growth
- Interim Cto/Coo
- It Carve-Out & Post-Merger Separation
- M365 Tenant-To-Tenant Migration
- Itil
- Supplier Management / Tenders
- Nearshore/Offshore Sourcing
- Agile Transformation
- Restructuring
Languages
Statistics
Experience
Global experience
Expertise
Frequently asked questions
Have questions? Find more information here.
Dennis is based in Munich, Germany and can operate in on-site, hybrid, and remote work models.
Dennis speaks the following languages: German (Native), English (Advanced).
Dennis has at least 20 years of experience. During this time, Dennis has worked in at least 10 different roles and for 9 different companies. The average length of individual experience is 1 year and 1 month. Note that Dennis may not have shared all experience and actually has more experience.
Based on recent experience, Dennis would be well-suited for roles such as: Interim Transition Manager, Interim Program Manager, Interim CTO.
Dennis's most recent position is Interim Transition Manager.
In recent years, Dennis has worked for Automotive supplier, FTTH-Bauunternehmen, Internationaler Telekommunikationsanbieter, living brain GmbH, and GarantieHeld UG.
Dennis is most experienced in industries like Information Technology, Telecommunication, and Professional Services. Dennis also has some experience in Automotive, Manufacturing, and Transportation.
Dennis is most experienced in business areas like Information Technology, Strategy, and Project Management. Dennis also has some experience in Procurement, Supply Chain Management, and Human Resources.
Dennis has recently worked in industries like Professional Services, Automotive, and Information Technology.
Dennis has recently worked in business areas like Information Technology, Procurement, and Project Management.
The availability of Dennis needs to be confirmed.
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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 26 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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