Tom Siebenaler - Founder & Owner

Q: Where is Tom based?

Tom is based in Augsburg, Germany .

Q: What languages does Tom speak?

Tom speaks the following languages: Luxembourgish (Native), German (Advanced), English (Advanced), French (Advanced) .

Q: How many years of experience does Tom have?

Tom has at least 11 years of experience. During this time, Tom has worked in at least 5 different roles and for 5 different companies . The average length of individual experience is 2 years and 3 months . Note that Tom may not have shared all experience and actually has more experience.

Q: What is Tom's latest experience?

Tom's most recent position is Founder & Owner at Seven Trees HR Consulting .

Q: What companies has Tom worked for in recent years?

In recent years, Tom has worked for Seven Trees HR Consulting , Omega AG , and Mercer Deutschland GmbH .

Q: Which industries is Tom most experienced in?

Tom is most experienced in industries like Professional Services , Banking and Finance , and Chemical . Tom also has some experience in Energy , Transportation and Logistics , and Manufacturing .

Q: Which business areas is Tom most experienced in?

Tom is most experienced in business areas like Human Resources (HR) , Project Management , and Strategy and Planning .

Q: Which industries has Tom worked in recently?

Tom has recently worked in industries like Professional Services , Chemical , and Energy .

Q: Which business areas has Tom worked in recently?

Tom has recently worked in business areas like Human Resources (HR) , Project Management , and Strategy and Planning .

Recommended expert

Augsburg, Germany

Experience

May 2023 - Present

2 years 11 months

Founder & Owner

Seven Trees HR Consulting

Providing support and guidance to small and medium-sized companies as an HR interim manager and HR consultant

Apr 2022 - Apr 2023

1 year 1 month

Munich, Germany

Head of HR

Omega AG

Designed and structured the newly established HR department
Acted as a strategic sparring partner for the executive team and management
Responsible for day-to-day HR operations including recruitment, HR business partner role, and personnel administration
Recruitment: assessing staffing needs, conducting interviews, drafting contracts, and onboarding new employees
HR business partner role: advising and supporting managers and employees on all HR matters
Personnel administration: point of contact for labor and social security law issues and performing pre-accounting payroll
Implementation of Personio (HR software): digital personnel files, setup for five entities, workflows, recruitment module, and absence management
Supported change and organizational development processes
Direct managerial responsibility for one employee

Jan 2021 - Mar 2022

1 year 3 months

Munich, Germany

Senior Consultant

Mercer Deutschland GmbH

Implemented a career model and performance management system for leaders (industries: finance, transport, manufacturing)
Identified future competencies/skills and developed a competency model (industries: pharma, retail, manufacturing)
Planned and executed a strategic workforce planning process (industries: finance, energy)
Carried out HR strategy projects (industries: retail, chemicals): identified future action areas and developed a roadmap
Independently led projects and provided technical leadership to (junior) consultants

Jul 2018 - Oct 2020

2 years 4 months

Aschheim, Germany

Organizational Development Manager

Wirecard AG

Proactively advised and supported 26 international locations (EMEA, APAC, AMER) in implementing and optimizing organizational structures
Presented results to top management and various steering committees
Facilitated and conducted workshops and training sessions
Independently designed, planned, and executed complex HR projects on a global scale
Implemented a global job architecture and integrated it into Workday
Designed and rolled out career paths
Aligned global role and competency profiles for strategic key positions

Sep 2014 - Jun 2018

3 years 10 months

Vienna, Austria

HR Consultant

Knowledge Markets Consulting

Supported clients throughout the entire project cycle (sales pitches, requirements workshops, project support, evaluation)
Prepared, implemented, and monitored multi-source/360-degree feedback processes with up to 500 feedbacks per process
Advised clients on digitally mapping their talent development programs and change processes

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Professional Services (6.5 years), Banking and Finance (3.5 years), Chemical (1 year), Energy (1 year), Transportation (1 year), and Manufacturing (1 year).

Professional Services

Banking and Finance

Chemical

Energy

Transportation

Manufacturing

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Human Resources (11.5 years), Project Management (7.5 years), and Strategy (1 year).

Human Resources

Project Management

Strategy

Summary

Passionate HR expert with 10 years of professional experience in: HR strategy & business partnering, HR administration, personnel and organizational development, HR digitization (e.g., Personio), HR consulting, and recruiting.

Skills

Microsoft Office: Word, Excel, Powerpoint
Hr Software: Personio, Workday, 2know2.com, Perbit, Perview
Communication: Trello, Slack, Asana

Languages

Luxembourgish

Native

German

Advanced

English

Advanced

French

Advanced

Education

Mar 2014 - Jul 2017

Vienna University of Economics and Business

PhD in Economics · Economics · Vienna, Austria · 1 (highest grade)

Sep 2011 - Jul 2013

University of Zurich

MSc in Organizational Psychology · Organizational Psychology · Zürich, Switzerland · 6 (highest grade)

Sep 2008 - Jul 2011

University of Basel

BSc in Psychology · Psychology · Basel, Switzerland · 6 (highest grade)

Profile

Created

November 2023

Last Update

April 2025

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Tom based?

Tom is based in Augsburg, Germany.

What languages does Tom speak?

Tom speaks the following languages: Luxembourgish (Native), German (Advanced), English (Advanced), French (Advanced).

How many years of experience does Tom have?

Tom has at least 11 years of experience. During this time, Tom has worked in at least 5 different roles and for 5 different companies. The average length of individual experience is 2 years and 3 months. Note that Tom may not have shared all experience and actually has more experience.

What roles would Tom be best suited for?

Based on recent experience, Tom would be well-suited for roles such as: Founder & Owner, Head of HR, Senior Consultant.

What is Tom's latest experience?

Tom's most recent position is Founder & Owner at Seven Trees HR Consulting.

What companies has Tom worked for in recent years?

In recent years, Tom has worked for Seven Trees HR Consulting, Omega AG, and Mercer Deutschland GmbH.

Which industries is Tom most experienced in?

Tom is most experienced in industries like Professional Services, Banking and Finance, and Chemical. Tom also has some experience in Energy, Transportation and Logistics, and Manufacturing.

Which business areas is Tom most experienced in?

Tom is most experienced in business areas like Human Resources (HR), Project Management, and Strategy and Planning.

Which industries has Tom worked in recently?

Tom has recently worked in industries like Professional Services, Chemical, and Energy.

Which business areas has Tom worked in recently?

Tom has recently worked in business areas like Human Resources (HR), Project Management, and Strategy and Planning.

What is Tom's education?

Tom holds a Doctorate in Economics from Vienna University of Economics and Business, a Master in Organizational Psychology from University of Zurich and a Bachelor in Psychology from University of Basel.