Two perspectives, one standard: projects that get decided.
Alpha Quadrat was founded in Wuppertal because the translation between building project, administration, financing and political decision is missing far too often. We deliver it: structured, neutral and reliable.
Yankhoba Momodou Osterholzer
Yankhoba Momodou Osterholzer leads Alpha Quadrat as founder and managing director. He combines technical understanding with commercial training and experience in running projects where many stakeholders, tight deadlines and clear budgets come together.
In recent years he lived, studied and worked in the United States. That time still shapes how he works: high pace, uncompromising client focus, and the attitude that a problem is worked until a solution stands.
His role in the company: he structures projects, organises the collaboration between clients, designers and authorities, and makes sure meetings turn into decisions. Clients get one contact who listens, prioritises and delivers, in German and in English.
- Founder and managing director, sole owner
- Lived, studied and worked in the USA
- Working languages German and English
Lazaros Amperidis
Lazaros Amperidis is an architect and member of the Chamber of Architects North Rhine-Westphalia, with project lead experience from large-scale projects, where he led larger design teams.
At Alpha Quadrat he is responsible for the legally protected services: permit design, building applications, change-of-use procedures and technical assessments are produced under his direction and carry his personal signature.
"Construction projects are complex, risk-laden undertakings that typically involve a multitude of changing actors in their initiation, planning, management, execution and supervision."
- Registered in the list of architects, Chamber of Architects NRW
- Project lead on large-scale projects
- Led larger design teams
- Built up the school building master plan unit of the district of Mettmann
From airport to school campus.
- EDUCATION
Civil engineering and architecture
Civil engineering at the University of Wuppertal, architecture at Dortmund University of Applied Sciences, CAD and construction management at the Technical Academy Wuppertal. Dipl.-Ing., architect, member of the Chamber of Architects North Rhine-Westphalia.
- AIRPORTS
Master planning in airport development
Project management and master planning in airport development: expansion planning to increase capacity, leading larger design teams in the live operation of an international airport.
- PUBLIC SECTOR
Department head and building master planning
Construction project management for public-sector and church-related social clients, and at the district of Mettmann head of the school building master plan unit as well as the building construction and facility management department.
- PUBLICATION
Author on construction project management
Author for the German public-administration journal Verwaltung der Zukunft, including 'Highly complex: construction project management in the public sector' (2021, with Prof. Dr. Silke Schoenert).
An office that scales with your project.
Alpha Quadrat works as a coordination office. The core stays deliberately lean: short paths, fast answers, one contact. For each project we assemble the right team from a permanent network of registered partner architects, specialist engineers and fire safety and inspection experts, many with references from large-scale projects up to airports.
We do not name network partners on the website. You meet them in person, with references and credentials for your specific project. Discretion is part of the craft in our industry.
Tell us about your project.
You will receive a personal reply within one business day, in English or German.