Achim Sossenheimer
My passion is helping people and companies develop their goals and visions. Walking the path of delivery together, guiding it and also challenging it, is one of my strengths.
Visionary, dynamic, human-centered.
The only constant in the universe is change. (Heraclitus)
Successfully introduced process improvements at a large real estate company.
My areas of expertise.
When companies grow, structures rarely grow cleanly with them. Roles overlap, decisions take too long, processes run through too many detours. The strategy is clear, but the organization is no longer built to deliver it reliably.
A critical transformation program can look good for a long time, even when it has already spun out of control. Status traffic lights remain green while risks mount, decision-making stalls, quality becomes unclear, and the expected benefits become increasingly difficult to prove...
My background
We bridge the gap between high-level consulting and operative reality. By combining deep digitalization expertise with implementation know-how.
- Banking
- Real Estate
Achim, an expert in project and change management as well as process consulting in finance and real estate, lives right next to the financial hub of Frankfurt am Main. Thanks to his varied career stations as head of IT and organization and his project experience as an external consultant for many well-known clients, he can be effective in the most diverse environments.
With great passion, Achim supports and guides his clients through organizational change processes in migration and transformation initiatives, and leads projects of various sizes. He has already put his capabilities and skills to good use in transformation projects several times and led them to success.
- Successful manager in IT and organization across several companies
- 20 years of project experience
- 25 years of SAP experience
More transparency and structure in IT demand management
Starting point:
DEUTZ wanted to make its existing demand-management structures more transparent and to assess strategic requirements more consistently in future.
Goal:
Introduce a standardized demand management with clear prioritization criteria and transparent decision processes to better steer IT initiatives.
Result:
Together with DEUTZ, grandega established a company-wide, unified demand process with clear responsibilities, standardized evaluation logic and greater transparency in decision-making.
The new demand process creates transparent decisions and strengthens the strategic alignment between business and IT.
More transparency and structure in IT demand management
Starting point:
DEUTZ wanted to make its existing demand-management structures more transparent and to assess strategic requirements more consistently in future.
Goal:
Introduce a standardized demand management with clear prioritization criteria and transparent decision processes to better steer IT initiatives.
Result:
Together with DEUTZ, grandega established a company-wide, unified demand process with clear responsibilities, standardized evaluation logic and greater transparency in decision-making.
The new demand process creates transparent decisions and strengthens the strategic alignment between business and IT.
How to find the right transformation partner for SAP S/4HANA
Problem:
Planning a comprehensive SAP S/4HANA greenfield transformation, the client needed to select the ideal implementation partner from a crowded field of potential vendors.
Goal:
To establish a transparent and structured selection process that enables an objective evaluation of potential consulting partners and lays the foundation for a successful transformation.
Result:
grandega designed and managed the entire tendering process - from vendor identification and evaluation through to final decision-making - establishing a robust foundation for selecting the ideal transformation partner.
grandega structured the selection process professionally, moderated it objectively, and supported us in making a well-founded decision for our future transformation journey.
New Work Structures for a Hybrid Working World
Problem:
The client faced the challenge of permanently embedding hybrid collaboration, new ways of working, and organizational changes within the company.
Goal:
To develop a structured 'New Normal' approach to improve collaboration, increase transparency, and successfully implement new working models.
Result:
grandega supported the client in designing and implementing the 'New Normal' program, utilizing structured governance frameworks, workshops, and initiatives to permanently anchor new ways of working.
grandega helped us implement new forms of collaboration in a structured manner and anchor them sustainably across the organization.
Structured Selection of a Future-Proof HR System
Starting point:
The client planned to modernize its HR system landscape and faced the challenge of selecting the right software and implementation partner for the future HCM solution.
Goal:
To establish a transparent and objective selection process in order to evaluate various vendors in a structured manner and create a robust foundation for decisions regarding the future HR system landscape.
Result:
grandega guided the selection process with deep HCM process expertise and extensive market knowledge, leading to a future-proof solution decision.
grandega supported us with a structured selection process to identify the right solution for our future HR system landscape.
Insights into our successful projects.
Learn firsthand how we have turned strategic goals into measurable success through close collaboration.
“It was a great fit both in terms of technical expertise and personal chemistry, grandega selected the absolute perfect person for the job.”
Managing Director, Willi Hahn GmbH
Project supported by grandega Technology
- Critical vacancy filled quickly
- The perfect fit, professionally and personally
- Highly flexible with no long-term commitment
“grandega is highly focused on execution and delivering results, rather than just teasing concepts in theory.”
Former Client & Advisor to grandega
- Not your typical consultancy
- Focused on real-world execution
- Adaptierbar für verschiedene Kundengruppen
“In my experience, grandega is a people-first consultancy that still places a strong emphasis on driving project execution.”
Head of Payment Engineering, Worldline
- A highly human and collaborative approach
- Professional in execution
- Committed to delivering final results
“Maximum structure and complete transparency throughout the selection process—that is how we made the right choice for our S/4 transformation together.”
Project at a major construction group
- A rigorous, structured vendor selection process
- Ensuring cultural fit through a collaborative capability workshop
- Full team buy-in behind the decision
“By extending our existing Identity Providers with MFA, we were able to achieve DORA compliance quickly and efficiently.”
Project at a major insurance group
- DORA-compliant authentication
- Nutzung bestehender Infrastruktur
- Wiederverwendbarer MFA-Standard
“From Excel chaos to a cloud-based HR solution—structured, collaborative, and with full team buy-in.”
Project at an IT & software company
- Transparente Aufnahme aller HR-Prozesse & Tools
- A structured vendor selection process with clear criteria
- The HR team fully backs the decision
“With a clear CCOE target picture, we ensured that the right people are in the right place at the right time.”
Project at a building materials supplier
- Gap analysis & roadmap for IT operations post-go-live
- Make-or-buy decision for critical key resources
- Risk mitigation through structured CCOE establishment
Why companies choose us
Let's talk about the success of your initiative.
A first conversation is the decisive step toward clarity: where does your project stand? Which levers will bring it onto a course for success? And above all: is the chemistry right for a successful partnership?
Our promise for this conversation: no obligation, honest, and on equal footing.
