Tammo Buss - Senior IT Demand Manager for HR Transformation

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Bad Zwischenahn, Germany

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Experience

Jun 2018 - Present

8 years 4 months

Senior IT Demand Manager, Central Divisions

EWE AG

Responsible for all IT initiatives in the HR and Legal board division acting as IT Business Partner HR, solution architect, and portfolio/project manager
Direct reporting to the CHRO as part of the 'HR Transformation' project
Architectural planning and application strategy for all approx. 70 HR-IT applications
Responsible for solution and integration architecture for 'Corporate' projects
Developing digitalization solutions for the entire group (e.g., digital signature, no-code/low-code platforms)
Part of the cloud task force, developing a cloud strategy and operational implementation of pilot projects in the cloud (AWS, Azure)
Developing solution architectures and integration architectures

Sep 2013 - May 2018

4 years 9 months

Westerstede, Germany

IT Coordinator, Senior Business Analyst in IT Management

Steinhoff Gruppe

Process, change, and transformation management (leading Europe-wide projects, especially the S4/Hana implementation)
Developing and preparing strategic IT decisions for the board
IT budget creation and responsibility, IT controlling, IT sourcing
SLA management: developing, negotiating, and managing IT service contracts
System responsibility for the Europe-wide SAP (FI/HCM) system, d.velop Enterprise Content Management System (d.3), and Data Integration Platform (Lobster_Data)
Central interface management: designing, implementing, testing, and further developing group-wide interfaces
Gathering and meeting IT requirements in business units
Participation in the global 'Steinhoff Talent Management and Executive Development Program' to prepare for the role of 'Head of Central Systems IT' in 2017/2018

Technical Project Manager

Alterric

Technical project manager for the project, including payroll outsourcing and implementation of 'Personio'

HR Transformation

EWE AG

Responsible for planning and executing the implementation of Workday, including the rollout of the HR process inventory
Leading the cross-functional team of HR business partners, process managers, and technical business analysts to identify process gaps (Workday←→ current processes) and develop target processes and technical solutions
Integration/data lead and responsible for the interface landscape of all Workday peripheral systems
Main contact for the works councils during negotiations of the transitional group works agreement on 'data migration and testing' and the final group works agreement on 'Workday'
Supporting and managing change and adoption measures
Primary contact for data protection, especially regarding 'Schrems II'

HR Transformation (pre-project)

EWE AG

Project manager and initiator of the HR Transformation pre-project for the tender of an HR management system under the sector regulation
Documenting the HR process inventory (BPMN and RACI)
Responsible for requirement definition and evaluation matrix for the tender of an HR management system (Workday, Oracle, SuccessFactors, Rexx, Magellan)

Industry experience

See where this freelancer has spent most of their professional time.

Experienced in Energy and Retail.

Energy

Retail

Business area experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Project Management, Human Resources, and Strategy.

Information Technology

Project Management

Human Resources

Strategy

Summary

Nine years of IT and process experience in the core areas of mid-sized corporations with a strong focus on implementing new systems in HR and finance areas with interdisciplinary teams. High technical competence combined with a deep understanding of departmental processes and requirements.

Skills

It/Erp Systems

Sap Hcm
Sap Fi
Workday
Lobster Data
Ecap [Agile Apps]
M365 Powerapps
M365 Power Automate
D.3 Ecm
Ms-Excel
Ms-Teams
Ms-Powerpoint (Very Good)
Workday
Leanix
Confluence Jira
Confluence Wiki
Dexicon Enterprise
Xflow Suite (Good)

Programming Languages & Technologies

Java
Abap
Groovy
Bpmn2
Rest
Json
Eepk
Uml
Edi
Xml
Sql
Ldap (Good)

Languages

German

Native

English

Advanced

Education

Apr 2011 - Aug 2013

C.v.O. Universität Oldenburg

Master of Science · Business Informatics · Oldenburg, Germany · 1.3

Aug 2010 - Mar 2011

Oakland University

Management Information Systems · United States · 1.0

Oct 2007 - Aug 2010

C.v.O. Universität Oldenburg

Bachelor of Science · Business Informatics · Oldenburg, Germany · 2.0

...and 2 more

Certifications & licenses

D.ecs Flow & Forms process management etc.

Workday HCM Fundamentals

Workday Report Writer

Statistics

Experience

Total positions 5

Experience in Energy 8.5 y

Avg length 2 y 7 m

Longest experience 8 y 3 m

Global experience

Countries worked in 1 (Germany)

Primary country Germany

Expertise

Recent roles Senior IT Demand Manager, Central Divisions, IT Coordinator, Senior Business Analyst in IT Management

Main industries Energy, Retail

Main business areas Information Technology, Project Management, Human Resources

Qualifications

Highest degree Master

Certifications earned 4

Profile

Member since

February 2024

Last update

May 2026

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Frequently asked questions

Have questions? Find more information here.

Tammo is based in Bad Zwischenahn, Germany.

Tammo speaks the following languages: German (Native), English (Advanced).

Tammo has at least 13 years of experience. During this time, Tammo has worked in at least 2 different roles and for 2 different companies. The average length of individual experience is 7 years and 6 months. Note that Tammo may not have shared all experience and actually has more experience.

Based on recent experience, Tammo would be well-suited for roles such as: Senior IT Demand Manager, Central Divisions, IT Coordinator, Senior Business Analyst in IT Management, Technical Project Manager.

Tammo's most recent position is Senior IT Demand Manager, Central Divisions at EWE AG.

In recent years, Tammo has worked for EWE AG.

Tammo is most experienced in industries like Energy and Retail.

Tammo is most experienced in business areas like Information Technology, Project Management, and Human Resources. Tammo also has some experience in Strategy.

Tammo has recently worked in industries like Energy.

Tammo has recently worked in business areas like Human Resources, Information Technology, and Project Management.

Tammo holds a Master in Business Informatics from C.v.O. Universität Oldenburg and a Bachelor in Business Informatics from C.v.O. Universität Oldenburg.

Tammo has 4 certificates. Among them, these include: D.ecs Flow & Forms process management etc., Modeling business processes clearly with BPMN2.0 (OCEB2-F), and Workday HCM Fundamentals.

The availability of Tammo needs to be confirmed.

Daily rate distribution

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Daily rate avg. 979 €

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Median rate 860 €

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Calculated based on our freelancers’ daily rates as of 6 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.