Your partner for future-proof building technology
Competent. Independent. Committed.
From planning renewable energy systems to providing objective expert opinions, we will ensure your project reaches its goal.
S&I is your reliable partner for comprehensive expert opinions and innovative problem solutions. We accompany our customers from the initial idea to successful implementation and beyond, ensuring tailor-made and sustainable results and projects.
With our many years of expertise and a first-class team, we offer solutions that go far beyond the standard. Put your trust in S&I – together we will shape the future.
Together toward a
sustainable future
Our group of companies
The alliance between S&I Sachverständige Ingenieure GmbH and Energiezentrale Nord GmbH forms a powerful partnership focused on sustainable and efficient heat supply. Together, we cover the entire value chain in the life cycle of modern heat supply systems, from planning to efficient operation.
Energiezentrale Nord GmbH is a trusted partner to the housing industry in northern Germany, specializing in the energy-efficient operation of heat generation systems. Our team of experienced engineers, master craftsmen, and measurement and control technicians offers customized solutions that optimize the operation of heat generation systems.
Our goal: to reduce operating costs and achieve CO2 reduction targets. To do this, we rely on innovative technologies for the digital analysis and optimization of technical systems.
In close cooperation with S&I Sachverständige Ingenieure GmbH, we focus on sustainable and efficient solutions for heating buildings. Our comprehensive expertise and innovative approaches help to maximize energy efficiency and ensure a sustainable heat supply in the long term.
Limits of responsibility in the life cycle of a heating system
- Heating load calculation
- Hydraulic balancing
- Plant design
- Tender
Solution – Overall responsibility creates efficiency
- Basic assessment
- Heating load calculation
- Hydraulic balancing
- 3D modeling
- Plant design
- Tender
Limits of responsibility in the life cycle of a heating system
- Heat generation
- Heat distribution
- Control wiring
- Construction supervision and acceptance
Solution – Overall responsibility creates efficiency
- Heat generation
- Heat distribution
- Control wiring with hydraulic control
- Construction supervision, quality assurance with assumption of responsibility
Limits of responsibility in the life cycle of a heating system
- Control programming
- Firing system commissioning
- Adjustment after fault message
Solution – Overall responsibility creates efficiency
- Control programming
- Optimization with remote access
- Commissioning measurement
Limits of responsibility in the life cycle of a heating system
- Optimization/adjustment following fault reports, increased consumption, or user changes
Solution – Overall responsibility creates efficiency
- Ensuring efficiency is maintained
- Function monitoring through surveillance
- Fault reporting management and targeted elimination
Our contact persons
Günter Wolter is the founder and managing director with over 15 years of experience in the metrological monitoring and optimization of heating systems. He is a publicly appointed expert in heating engineering.
Dipl. Ing. Günter Wolter
Managing director
guenter.wolter@s-u-i.de
T. +49 40 5 37 98 20 80
Tobias König leads the company with a focus on innovation and sustainable development. He promotes team cohesion and growth through strategic leadership and forward-looking solutions.
Tobias König
Managing director
kontakt@s-u-i.de
T. +49 40 5 37 98 20 80
Mel Meyer has extensive experience in project coordination and strategic planning. As managing director, he is responsible for operational management and ensuring that the company’s goals are achieved.
Mel Meyer
Operational management
mel.meyer@s-u-i.de
T. +49 40 5 37 98 20 85
Alexander Schwarz works in project management and is responsible for planning, project development, and construction supervision. He is a technical business economist specializing in heating and air conditioning technology.
Alexander Schwarz
Project management TGA
alexander.schwarz@s-u-i.de
T. +49 40 5 37 98 20 87
Tanja Wolter brings years of experience in administration and organization to the table. She leads the team in administrative tasks and ensures that everything runs smoothly within the company.
Tanja Wolter
Accounting
tanja.wolter@s-u-i.de
T. +49 40 5 37 98 20 80
Alison König is an expert in research and development in the field of technical building equipment. She brings innovative solutions and technical progress to the company.
Dr. Alison König
Expertise
alison.koenig@s-u-i.de
T. +49 40 5 37 98 20 80
Gesine Wotschke has been assistant to the management and fleet manager since 2019. She supports the court expert in coordinating and preparing court reports.
Gesine Wotschke
Executive Assistant
gesine.wotschke@s-u-i.de
T. +49 40 5 37 98 20 80
Steffen Schaub plans and implements construction projects. With years of experience in project management and construction, he ensures the successful completion of projects.
Steffen Schaub
Project management TGA
steffen.schaub@s-u-i.de
T. +49 40 5 37 98 20 86
Jürgen Schwarz brings extensive experience in technical building equipment to the table. He develops and implements technical systems in various construction projects.
Dipl.-Ing. Jürgen Schwarz
Project Engineer for Air Conditioning, Ventilation, Refrigeration, and Expert Services
juergen.schwarz@s-u-i.de
T. +49 40 5 37 98 20 80
Wioletta Glowacka is responsible for internal sales and project controlling. With a master’s degree in logistics, she ensures efficient project management and supports sales processes.
Wioletta Glowacka
Internal sales & Projektcontrolling
wioletta.glowacka@s-u-i.de
T. +49 40 5 37 98 20 83
Jens Schoenell specializes in technical building equipment and project management. He oversees the planning and implementation of innovative technical solutions in construction projects.
Jens Schoenell
Project management for energy systems
Energy efficiency expert for residential buildings
jens.schoenell@s-u-i.de
T. +49 40 5 37 98 20 84
Kassandra Hornhardt is responsible for TGA planning and construction projects. She creates precise technical drawings and models and coordinates architects and engineers as a project manager.
Kassandra Hornhardt
Technical System Planner
CAD & Project Manager
kassandra.hornhardt@s-u-i.de
T. +49 40 5 37 98 20 80
Marieke Rehders is responsible for business development and controlling. She has a bachelor’s degree in business administration with a focus on finance.
Marieke Rehders
Business development
marieke.rehders@s-u-i.de
T. +49 40 5 37 98 20 80
Christoph Essel is a project manager and expert in the field of drinking water hygiene. With a bachelor’s degree in renewable building energy technology, he ensures quality and compliance in projects.
Christoph Essel
Project Engineer, Building Services Engineering
christoph.essel@s-u-i.de
T. +49 40 5 37 98 20 90
Inge-Lore König specializes in employee training. She promotes professional development and continuous learning within the company.
Inge-Lore König
Coordinator for continuing education and training projects
ilo.koenig@s-u-i.de
T. +49 40 53 79 82 00
Jan Schulz is a project engineer for energy systems with a focus on heating modernization. He is responsible for planning, basic research, and construction supervision in the field of mechanical engineering.
Jan Schulz
Project Engineer Energy Systems
jan.schulz@s-u-i.de
T. +49 40 5 37 98 20 89
Jonas Wolter supports technical project planning as a working student. He is involved in the planning and implementation of projects and drives forward digitalization within the company.
Jonas Wolter
Working student / Technical project organization
jonas.wolter@s-u-i.de
T. +49 40 5 37 98 20 80
Katharina Schröder is responsible for strategic direction, digitization processes, and event coordination. She holds a bachelor’s degree in agricultural sciences.
Katharina Schröder
Strategic corporate orientation
katharina.schroeder@s-u-i.de
T. +49 40 5 37 98 20 80
Malte Carolus is a project engineer for energy systems. He develops concepts for the modernization of heating and PV systems. He is responsible for project management and quality assurance for hydraulic balancing.
Malte Carolus
Project Engineer,
Energy Systems and PV
malte.carolus@s-u-i.de
T. +49 40 5 37 98 20 91
Nadja Knaus is responsible for marketing and communications. She develops and implements brand positioning strategies and handles the company’s public relations.
Nadja Knaus
Marketing and communication
nadja.knaus@s-u-i.de
T. +49 40 5 37 98 20 80
Omar Masoud is a project engineer specializing in energy systems. His expertise includes the analysis of heating systems and the precise planning of efficient energy systems.
Omar Masoud
Project Engineer Energy Systems
omar.masoud@s-u-i.de
T. +49 40 5 37 98 20 92
As a project engineer, Lukas Land is responsible for the successful implementation of sustainable construction projects with a focus on the energy efficiency of heating systems. He manages the planning and supervision of these projects.
Lukas Land
Project engineer
T. +49 40 5 37 98 20 15
As data protection officer, Rashin Ganji is responsible for compliance with all relevant data protection regulations and is your contact person for questions regarding the protection of business data.
Rashin Ganji
Data protection
T. +49 40 53 79 82 00
Help us shape the future – become part of our team!
Join
our team!
Günter Wolter is the founder and managing director with over 15 years of experience in the metrological monitoring and optimization of heating systems. He is a publicly appointed expert in heating engineering.
Dipl. Ing. Günter Wolter
Managing director
guenter.wolter@s-u-i.de
T. +49 40 5 37 98 20 80
Tobias König leads the company with a focus on innovation and sustainable development. He promotes team cohesion and growth through strategic leadership and forward-looking solutions.
Tobias König
Managing director
kontakt@s-u-i.de
T. +49 40 5 37 98 20 80
Mel Meyer has extensive experience in project coordination and strategic planning. As managing director, he is responsible for operational management and ensuring that the company’s goals are achieved.
Mel Meyer
Operational management
mel.meyer@s-u-i.de
T. +49 40 5 37 98 20 85
Alexander Schwarz works in project management and is responsible for planning, project development, and construction supervision. He is a technical business economist specializing in heating and air conditioning technology.
Alexander Schwarz
Project management TGA
alexander.schwarz@s-u-i.de
T. +49 40 5 37 98 20 87
Tanja Wolter brings years of experience in administration and organization to the table. She leads the team in administrative tasks and ensures that everything runs smoothly within the company.
Tanja Wolter
Accounting
tanja.wolter@s-u-i.de
T. +49 40 5 37 98 20 80
Alison König is an expert in research and development in the field of technical building equipment. She brings innovative solutions and technical progress to the company.
Dr. Alison König
Expertise
alison.koenig@s-u-i.de
T. +49 40 5 37 98 20 80
Gesine Wotschke has been assistant to the management and fleet manager since 2019. She supports the court expert in coordinating and preparing court reports.
Gesine Wotschke
Executive Assistant
gesine.wotschke@s-u-i.de
T. +49 40 5 37 98 20 80
Steffen Schaub plans and implements construction projects. With years of experience in project management and construction, he ensures the successful completion of projects.
Steffen Schaub
Project management TGA
steffen.schaub@s-u-i.de
T. +49 40 5 37 98 20 86
Load more
Jürgen Schwarz brings extensive experience in technical building equipment to the table. He develops and implements technical systems in various construction projects.
Dipl.-Ing. Jürgen Schwarz
Project Engineer for Air Conditioning, Ventilation, Refrigeration, and Expert Services
juergen.schwarz@s-u-i.de
T. +49 40 5 37 98 20 80
Wioletta Glowacka is responsible for internal sales and project controlling. With a master’s degree in logistics, she ensures efficient project management and supports sales processes.
Wioletta Glowacka
Internal sales & Projektcontrolling
wioletta.glowacka@s-u-i.de
T. +49 40 5 37 98 20 83
Jens Schoenell specializes in technical building equipment and project management. He oversees the planning and implementation of innovative technical solutions in construction projects.
Jens Schoenell
Project management for energy systems
Energy efficiency expert for residential buildings
jens.schoenell@s-u-i.de
T. +49 40 5 37 98 20 84
Kassandra Hornhardt is responsible for TGA planning and construction projects. She creates precise technical drawings and models and coordinates architects and engineers as a project manager.
Kassandra Hornhardt
Technical System Planner
CAD & Project Manager
kassandra.hornhardt@s-u-i.de
T. +49 40 5 37 98 20 80
Marieke Rehders is responsible for business development and controlling. She has a bachelor’s degree in business administration with a focus on finance.
Marieke Rehders
Business development
marieke.rehders@s-u-i.de
T. +49 40 5 37 98 20 80
Christoph Essel is a project manager and expert in the field of drinking water hygiene. With a bachelor’s degree in renewable building energy technology, he ensures quality and compliance in projects.
Christoph Essel
Project Engineer, Building Services Engineering
christoph.essel@s-u-i.de
T. +49 40 5 37 98 20 90
Inge-Lore König specializes in employee training. She promotes professional development and continuous learning within the company.
Inge-Lore König
Coordinator for continuing education and training projects
ilo.koenig@s-u-i.de
T. +49 40 53 79 82 00
Jan Schulz is a project engineer for energy systems with a focus on heating modernization. He is responsible for planning, basic research, and construction supervision in the field of mechanical engineering.
Jan Schulz
Project Engineer Energy Systems
jan.schulz@s-u-i.de
T. +49 40 5 37 98 20 89
Jonas Wolter supports technical project planning as a working student. He is involved in the planning and implementation of projects and drives forward digitalization within the company.
Jonas Wolter
Working student / Technical project organization
jonas.wolter@s-u-i.de
T. +49 40 5 37 98 20 80
Katharina Schröder is responsible for strategic direction, digitization processes, and event coordination. She holds a bachelor’s degree in agricultural sciences.
Katharina Schröder
Strategic corporate orientation
katharina.schroeder@s-u-i.de
T. +49 40 5 37 98 20 80
Malte Carolus is a project engineer for energy systems. He develops concepts for the modernization of heating and PV systems. He is responsible for project management and quality assurance for hydraulic balancing.
Malte Carolus
Project Engineer,
Energy Systems and PV
malte.carolus@s-u-i.de
T. +49 40 5 37 98 20 91
Nadja Knaus is responsible for marketing and communications. She develops and implements brand positioning strategies and handles the company’s public relations.
Nadja Knaus
Marketing and communication
nadja.knaus@s-u-i.de
T. +49 40 5 37 98 20 80
Omar Masoud is a project engineer specializing in energy systems. His expertise includes the analysis of heating systems and the precise planning of efficient energy systems.
Omar Masoud
Project Engineer Energy Systems
omar.masoud@s-u-i.de
T. +49 40 5 37 98 20 92
As a project engineer, Lukas Land is responsible for the successful implementation of sustainable construction projects with a focus on the energy efficiency of heating systems. He manages the planning and supervision of these projects.
Lukas Land
Project engineer
T. +49 40 5 37 98 20 15
As data protection officer, Rashin Ganji is responsible for compliance with all relevant data protection regulations and is your contact person for questions regarding the protection of business data.
Rashin Ganji
Data protection
T. +49 40 53 79 82 00
Help us shape the future – become part of our team!
Join
our team!
Join our team at S&I
At S&I Sachverständige Ingenieure GmbH, we bring innovative projects to fruition with passion and precision. Every day, we bring projects to life with passion, expertise, and precision. As an employer, we promote diversity, continuous learning, and open communication. With us, you can expect meaningful work with a direct impact and a lot of responsibility. Flat hierarchies, quick decisions, and varied tasks characterize our young, dynamic team. Become part of our team and shape the future with us!