Graduate School Sustainable and Intelligent Systems (NISys)

Arda, Hakan: "The Digital Heritage - New Possibilities for Overcoming Grief" (THWS)

Aron, Moritz: "Intelligent and Robust Thermal Management of Electric Traction Drives" (HSCO)

Berk, Diyar: "Investigation of the Aging Behavior of Polymeric Insulation Materials for HVDC Cable Accessories" (THWS)

Blenk, Tobias: "Entwicklung und Untersuchung von Verfahren zur zustandsraumbasierten Lastflussstimulation elektrischer Netze und deren methodischer Zustandsbewertung" (HSCO)

Bottler, Sebastian: "Entwicklung von Verfahren zur Modellierung, Analyse und Bewertung des Netzbetriebs in sektorgekoppelten Energiesystemen unter Berücksichtigung der lastabhängigen Alterung von Betriebsmitteln" (HSCO)

Briones Espinoza, Maria Celia: "Advancing environmental assessment through multi-database integration, large-scale scenario exploration, and machine learning" (THWS)

Brückner, Christoph: "Verfahren zur effizienten Datenreduktion und Bewertung von HD-Kartenmethoden für eine präzise Eigenlokalisierung autonomer Fahrzeuge" (HSCO)

Büchner, Marcel: "Entwicklung eines Rahmnwerkes (Frameworks) zur Transition von ManufactoringExecution Systeme (MES) in matrixorganisierte Produktionssysteme (MPS)" (THWS)

Bullmann, Markus: "Probabilistic Local Spatial Radio Frequency Model for Indoor Positioning" (THWS)

Büttner, Fabian: "Decarbonizing existing district heating networks through cluster-based temperature reduction and decentral heat pumps " (THWS)

Chaar, Mohamad Mofeed: "Improve the Perception of Foggy Conditions Using Multi Categories of Fog Density" (THAB)

Chaudhary, Renu: "Modeling and Optimization of Heating Systems with Consumer-Supplier Synergies" (THWS)

Chizhov, Pavel: "Enhancing the Efficiency, Performance, and Safety of Language Models through Optimized Tokenization Strategies" (THWS)

Dehghani, Ali: "A Hybrid Framework for Multi-Pedestrian Intention Prediction in Autonomous Driving Environments" (HSCO)

Frenzel, Daniel: "Optimierung von Trocknungskompressen zur Salzreduktion an mineralischen Baustoffen unter Anwendung bodenphysikalischer Messmethoden und hygrischen Simulationen" (HSCO)

Galwadu Arachige, Vidushi Kaushali: "Advanced manufacturing of ZrNiSn thermoelectric" (THAB)

Gorks, Manuel: "Prognosegestützte Regelungs- und Energiemanagementstrategien für einen energieeffizienten Betrieb von Wärmepumpensystemen" (THAB)

Götz, Susanna: "Digitalisierung in der medizinischen Lehre: Entwicklung einer Anwendung zur digitalen Erweiterung der medizinischen Lehre im Schwerpunkt Auskultation" (THWS)

Guo, Chenxi: "Enhancing Dynamic Scene Understanding in Manual Assembly Processes" (THAB)

Hefter, Alexander: "Machine Learning based modeling of district heating systems" (THAB)

Heilmann, Marcel: "Beiträge zur Kraftberechnung im Luftspalt von Käfigläufer Asynchronmaschinen" (THWS)

Henkelmann, David: "Entwicklung einer Methode zur Integration von Barrierefreiheit in den Softwareentwicklungsprozess: Förderung der digitalen Inklusion durch einen proaktiven Barrierefreiheits-Zwillingsprozess" (THWS)

Hertlein, Timo: "Entwicklung, Modellierung und Bewertung intelligenter Ladeinfrastrukturen für Elektromobilität und deren netzorientierte Integration" (HSCO)

Herz, Marie: "Emotionshandschuh zur Förderung von Inklusion: Assistenzsystem für die nonverbale Übermittlung von Gesichtsemotionen" (THWS)

Hufgard, Simone: "Microfabricated 3D biosensor for investigating connectivity between different brain regions" (THAB)

Iorpenda, Msuega: "Automatic Multi-Sensor Calibration for Drones"(THWS)

Keller, Daniel: "Multiphysikalische Untersuchung von Synchronmaschinen unter Berücksichtigung elektromagnetischer und mechanischer Wechselwirkungen auf Basis der Finite-Elemente-Methode" (THWS)

Klehr, Lukas: "Advanced Monitoring und Datenaustausch von Bearbeitungsprozessen für nachhaltige und zukunftsorientierte Wertschöpfungsketten" (THWS)

Köstner, Tobias: "Berechnung der elektrischen Festigkeit von Isoliergasen elektrischer Betriebsmittel mit schwach inhomogenen Feldern bei hohen Drucken bzw. hohen Feldstärken unter Beachtung von Elektronen-Emissionsvorgängen" (HSCO)

Kranz, Philipp: "Safe Human-Robot Collaboration for Non-Deterministic Assembly Processes" (THWS)

Kuhlmann, Kai: "Zustandsapproximation von Lithium-Ionen-Batterien: Modellierung und applikationsnahe, Validierung für einen sicheren und lebensdaueroptimierten Betrieb in Flurförderzeugen" (THAB)

Kutzner, Aaron: "KI-gestützte Entwicklung von Information Security Awareness Maßnahmen" (THWS)

Lang, Silvio: "Virtual Cobotting (ViCob) Virtuelle Erprobung von kollaborativen Arbeitsplätzen und Arbeitsprozessen" (THWS)

Laskowitz, Leonie: "Kinematische Analysen mit Motion Capture und Virtual Reality: Fokus auf die Interaktion zwischen Mensch und Technologie sowie Immersionseffekten unter Berücksichtigung von ethischen, psychologischen und soziologischen Aspekten" (THWS)

Lewczuk, Patrycja: "Der Hochdruck-Autoklaven-Test (HPAT) als modernes und energieeffizientes Verfahren zur beschleunigten thermo-oxidativen Alterung von Kunststoffprodukten." (THWS)

Lyu, Gengcheng: "Causality-based decision-making method in Cybersecurity scenario" (THWS)

Manger, René: "Untersuchung des dielektrischen Verhaltens von umweltfreundlichen Alternativen zu Mineralöl unter Gleichspannungsbelastung" (THWS)

Meuser, Martin: "Analyse von Überspannungen in Leistrungstransformatoren" (THWS)

Michaelis, Thomas: "Fast Optimization of Vibroacoustic Properties by Model Order Reduction of Additively Manufactured Composites" (THWS)

Mill, Senta: "Neubewertung der Parameter zur Bestimmung der Behaglichkeit in Innenräumen - Erweiterung und Validierung des PMV-Modells nach Fanger unter Berücksichtigung thermischer, nicht thermischer und individueller Faktoren" (THWS)

Miller, Eddi: "Adaptive Job Shop Scheduling based on dynamic constraints created by random disruptions using Deep Reinforcement Learning" (THWS)

Müller, Sven: "Potenzialermittlung und Analyse der Auswirkungen des Energy Sharing zwischen KMUs auf Verteilnetze und beteiligte Unternehmen" (HSCO)

Nafez, Nahid: "A complex network analysis based on high resolution images of in vitro neuronal networks" (THAB)

Narymany Shandy, Amir: "Erweiterung der Laser-Flash Analyse um eine PINN-gestützte Eintragsflächen-Auswertung" (THWS)

Obeidavi, Sahereh: "Real-Time 3D Environmental Perception for Collision Avoidance Using Omnidirectional Stereo Vision and Deep Learning for Autonomous Driving Systems" (HSCO)

Patil, Mansi Shrirang: "Remote sensing data as a priori for autonomous exploration of a permanent crop field" (THWS)

Pfister, Tom: "Benutzerzentrierte Roboterprogrammierung mit Mixed Reality" (THWS)

Riedelbauch, Lukas: "Entwicklung und Erforschung eines ganzheitlichen Ansatzes zur Restlebensdauerbestimmung von aus dem Feld zurückkehrenden Traktionsbatteriemodulen und zur applikationsspezifischen Kombination von gemischt aufgebauten stationären Energiespeichern für zukünftige energieautarke Gebäude" (HSCO)

Sauer, Christian: "Development of an in-situ method for the analysis of additively manufactured components" (THWS)

Schönau, Maximilian: "Ertragsbewertung von Photovoltaischen Kraftwerken mithilfe Maschinellen Lernens" (HSCO)

Schuhmacher, Marcel: "On the role of AI and resource efficient production on sustainability performance" (THAB)

Seitz, Philipp: "Design of Neural Networks and Statistical Methods for Surrogate-based Optimization in Non-linear Regression of Unknown Parameter Spaces with Sparse Data" (THWS)

Spengler, Tobias: "Latent thermal energy storage in future sustainable energy systems: A techno-economic and environmental evaluation" (THWS)

Spielmann, Luca: "Intelligente Regelung geothermischer Heizungssysteme mit Wärmepumpe" (THAB)

Stollberger, André: "Bestimmung von Alterungseigenschaften von Kunststoffen mittels künstlicher Intelligenz" (THWS)

Straßer, Claire: "Analysis and Simulation of the Curing Process of an Epoxy Resin for the Production of Large Industrial Parts" (THWS)

Talluri, Kranthi Kumar: "AI-Driven Traffic Optimization: Modeling to Uncertainties, Green Wave Synchronization, and Sensor-Integrated Solutions for Urban Mobility" (THAB)

Targitay, Deniz: "Combined Theoretical and Experimental Investigation of the Dielectric Behavior of Solid-Liquid Composite Insulation Systems" (THWS)

Tessitore, Marvin: "Optimierung des Studiums durch Künstliche Intelligenz und Digitalisierung: Konzeption, Entwicklung und Implementierung eines Digitalen Studienbegleiters; Optimization of Academic Studies through Artificial Intelligence and Digitalization: Conceptualization, Development, and Implementation of a Digital Study Companion" (THWS)

Turacan, Kerim: "Calibrated Evidential Uncertainty Estimation in Environmental Perception -and Trajectory Forecast of Vulnerable Road Users" (THAB)

Uhr-Müller, Ann-Catrin: "Methodische Ableitung von Verfahren zur diagnostischen Analyse von Mittelspannungskomponenten durch Anwendung von Systemen zur künstlich beschleunigten Alterung" (HSCO)

Unger, Florian: "Entwicklung einer biologisch abbaubaren Zink Ionen Batterie auf der Basis von  nachhaltigen Materialien" (THAB)

Valencia Usme, Yeimy Paola: "Einsatz von Lernanalysen zur Vorhersagein Lernmanagementsystemen (LMS) mithilfe künstlicher Intelligenz" (THAB)

Wahyudi, Vincent: "Multimodal Fusion for Anomaly Detection in Reusable Industrial Objects: Improving Predictions by Providing Known Priors" (THWS)

Walter, Tina: "Multispektrale Optische Tomografie als Tool für das PBF-LB/M Prozessmonitoring / Multi-spectral optical tomography as tool for the PBF-LB/M process monitoring" (THWS)

Weng, Niklas: "Analyse des Hochfrequenzeinflusses und der thermischen Belastung auf die Lebensdauer elektrischer Isolierstoffe (HOFI)" (THWS)

Werner, Max: "Time-Continuous Probabilistic Sensor Fusion for Filtering, Smoothing and Prediction" (THWS)

Wiesner, Valentin: "Optimierung additiver Druckprozesse durch ergänzende Anwendung von statistischer Versuchsplanung bei ML-Algorithmen zur Modellerstellung" (THWS)

Wist, Andreas: "Prüfverfahren zur Qualifizierung von Motorisolierungen für den direkten Anschluss an schnellschaltende Pulsumrichtern" (THWS)

Zerl, Marco: "Design von applikationsspezifischen Antrieben für batteriebetriebene Nutzfahrzeuge" (THAB)

 

 

In the graduate school, doctorates in the following fields of application are possible:

• Energy and infrastructure systems
• Mobility
• Production and materials

The professors involved in the graduate school choose and assign the topics of doctoral theses according to their individual areas of expertise.

The following professors will be members of the graduate school (sorted by higher education institution and given in alphabetical order).

THWS:

• Prof. Dr. Ansgar Ackva, Faculty of Electrical Engineering and Technology Transfer Center for E-Mobility
• Prof. Dr. Markus Bier, Faculty of Applied Natural Sciences and Humanities
• Prof. Dr.-Ing. Volker Bräutigam, Faculty of Business and Engineering
• Prof. Dr.-Ing. Ansgar Brunn, Faculty of Plastics Engineering and Surveying
• Prof. Dr.-Ing. Juan Felipe Cerdas Marín, Faculty of Business and Engineering
• Prof. Dr. Frank Deinzer, Faculty of Computer Science and Business Information Systems
• Prof. Dr. Kai Diethelm, Faculty of Applied Natural Sciences and Humanities
• Prof. Dr. Alexander Dobhan, Faculty of Business and Engineering
• Prof. Dr.-Ing. Bastian Engelmann, Faculty of Business and Engineering
• Prof. Dr.-Ing. Miguel Gonzalez-Salazar, Faculty of Business and Engineering
• Prof. Dr. Jan Hansmann, Faculty of Electrical Engineering
• Prof. Dr. Jürgen Hartmann, Faculty of Applied Natural Sciences and Humanities
• Prof. Dr.-Ing. Henning Kasten, Faculty of Electrical Engineering
• Prof. Dr. Tobias Kaupp, Faculty of Electrical Engineering
• Prof. Dr.-Ing. Joachim Kempkes, Faculty of Electrical Engineering
• Prof. Dr. Normen Langner, Faculty of Architecture and Civil Engineering
• Prof. Dr.-Ing. Pascal Meißner, Faculty of Computer Science and Business Information Systems
• Prof. Dr. Nicholas Müller, Faculty of Computer Science and Business Information Systems and Institute of Design and Information Systems
• Prof. Dr. Stefanie Retka, Faculty of Mechanical Engineering
• Prof. Dr.-Ing. Fabian Scheller, Faculty of Business and Engineering
• Prof. Dr. Andreas Schiffler, Faculty of Mechanical Engineering
• Prof. Dr. Frank-Michael Schleif, Faculty of Computer Science and Business Information Systems
• Prof. Dr. Jan Schmitt, Faculty of Business and Engineering
• Prof. Dr. Dominik Seuß, Faculty of Computer Science and Business Information Systems
• Prof. Dr. Martin Storath, Faculty of Applied Natural Sciences and Humanities
• Prof. Dr. Mark Vetter, Faculty of Plastics Engineering and Surveying
• Prof. Dr. Andreas Weinmann, Faculty of Applied Natural Sciences and Humanities
• Prof. Dr.-Ing. Volker Willert, Faculty of Electrical Engineering
• Prof. Dr. Ivan Yamshchikov, Faculty of Computer Science and Business Information Systems, Center for Artificial Intelligence
• Prof. Dr.-Ing. Markus H. Zink, Faculty of Electrical Engineering 

 

TH AB:

• Prof. Dr.-Ing. Konrad Doll, Faculty of Engineering and Informatics
• Prof. Dr. Ralf Hellmann, Faculty of Engineering and Informatics
• Prof. Dr.-Ing. Mohammed Krini, Faculty of Engineering and Informatics
• Prof. Dr.-Ing. Michael Mann, Faculty of Engineering and Informatics
• Prof. Dr. Michael Möckel, Faculty of Engineering and Informatics
• Prof. Dr.-Ing. Simon Pauly, Faculty of Engineering and Informatics
• Prof. Dr. Dirk Pietruschka, Faculty of Engineering and Informatics
• Prof. Dr. Peter Gordon Rötzel, Faculty of Engineering and Informatics
• Prof. Dr.-Ing. Johannes Teigelkötter, Faculty of Engineering and Informatics
• Prof. Dr.-Ing. Christiane Thielemann, Faculty of Engineering and Informatics
• Prof. Dr. Galia Weidl, Faculty of Engineering and Informatics
• Prof. Dr.-Ing. Klaus Zindler, Faculty of Engineering and Informatics

Further information on the research fields of the professors at Aschaffenburg University of Applied Sciences can be found on the university's website.

HS CO:

• Prof. Dr. Marco Denk, Faculty of Mechanical and Automotive Engineering (FMA)
• Prof. Dr. Klaus Stefan Drese, Faculty of Applied Sciences and Health (FNG)
• Prof. Dr.-Ing. Philipp Epple, Faculty of Mechanical and Automotive Engineering (FMA)
• Prof. Dr. Dieter Landes, Faculty of Electrical Engineering and Computer Science (FEI)
• Prof. Dr. Lucila Patiño Studencki, Faculty of Mechanical and Automotive Engineering (FMA)
• Prof. Dr.-Ing. Michael Rossner, Faculty of Electrical Engineering and Computer Science (FEI)
• Prof. Dr.-Ing. Alexandra Troi, Faculty of Design (FD)
• Prof. Dr.-Ing. Christian Weindl, Faculty of Electrical Engineering and Computer Science (FEI)

Further information on the research fields of the professors at Coburg University of Applied Sciences can be found on the university's website.

The graduate school only awards the degree Doctor of Engineering, the German "Dr.-Ing.".

Do you have further questions about a doctorate at the Graduate School NISys or admission as a professorial member?

Please contact the administration office:

promotionszentrum-nisys[at]thws.de

+49 931 3511 -8115 (Johanna Franke)

+49 931 3511 -8328 (Dr. Simone Stork)

The requirements for admission to doctoral studies are set out in the doctoral regulations (see above).

Admission to a doctorate with only a Bachelor's degree, so-called fast-track, is currently not envisaged. There are also no plans for admission with a FH diploma.

There is no general answer to this question as various aspects must be taken into consideration:

• the doctoral degree regulations of the university you are currently enrolled at
• the doctoral degree regulations (Promotionsordnung) of the graduate school
• the regulations on the type and scope of the qualification programme and the guidelines on publication-based dissertations (cumulative dissertations)
• the progress of your doctoral project
• disciplinary and inter-disciplinary achievements which can be accredited for the intended qualification programme of the graduate school

It must be assessed for the individual case whether changing the institution it is formally possible, also whether it entails disadvantages for you that could influence your decision (e.g., time delay, lacking access to resources or required networks, etc.).

Please note: The decision on the recognition of prior achievements within the framework of the qualification program is made by the doctoral committee on the basis of the complete application documents. The doctoral committee also decides on your admission to the graduate school.

Please contact us if simultaneous registration/matriculation/acceptance as a doctoral candidate at your university and at the graduate school is not possible according to the requirements of your previous university before you deregister there. (Contact by e-mail: promotionszentrum-nisys@thws.de)

Doctoral projects at the graduate school generally take three to five years from acceptance at the graduate school to completion of the examination procedure. Exceptions are provided for in the doctoral regulations (§ 22 PromO).

In the graduate school, all doctoral candidates are required to complete a mandatory qualification programme. It consists of a set number of mandatory elements and electives that must be completed in these four modules:

• Module 1: Interdisciplinary qualification across higher education institutions
  • Good scientific practice
  • Technology assessment, scientific ethics, key qualifications, career development, etc.
• Module 2: Specialist qualification in the fields of application of the graduate school
• Teaching tasks, progress report, feedback discussions
• Publications, supervision of theses, participation in lectures, Master's modules, etc.
• Module 3: Networking within and outside the graduate school
• Doctoral seminar/retreat, external conference
• Organization of events, networking with industry, etc.
• Module 4: Internationalisation
• International conferences or research stays, promotion of intercultural competence, language course

Further information on the qualification programme can be found in the "Guidelines on the type and scope of the qualification programme" (only available in German, see Downloads).

The financing of doctoral projects in the graduate school does not differ from the financing of other doctoral projects. Here are your options:

• Employment as research associate with one of the three universities involved: For this, please check the job postings of the higher education institutions or contact potential supervisors directly. In general, this employment is financed through third-party funding, which the professors apply for with the funding parties.
• Funding by a doctoral scholarship programme: Students and research assistants at THWS can search for scholarships and awards in the ELFI funding database. Furthermore, the mystipendium.com portal contains an extensive collection of scholarships. Applications for scholarships must be submitted by the candidates themselves. 
• Extra-occupational doctorate (see next question)
• Financing by individual means (savings, family, ...)

Please note that application and admission to the Graduate School is not linked to financial support. However, no tuition fees are charged for the doctorate.

Extra-occupational doctorates, i.e. completing the doctoral project alongside one’s principal occupation, are not excluded a priori. The professors involved in the graduate school may individually decide which topic is suitable for an extra-occupational doctorate. They shall also take into account that the doctoral candidate must be able to manage the time and financial requirements to complete the research topic, to participate in the evaluation procedure and to complete the qualification programme.

In such cases, the doctorate is considered a continued personal qualification. Employers’ openness towards their employees’ continued personal qualification varies. Some doctoral candidates might thus receive extensive support from their employer (e.g., exemptions for THWS courses and events). Temporary reduction of working hours can offer you more time to focus on your doctoral project.

Therefore, we cannot give a general recommendation as to whether you should inform your employer of your project or not. However, if there is an overlap in terms of content with your field of work and your doctoral topic, it is advisable or absolutely necessary to consult your employer if you intend to use your employer's intellectual property for your research.

No, doctoral projects at the graduate school do not involve doctoral degree programmes. Hence no fees are to be paid.

Under "General information - which areas of expertise will be covered by the graduate school?" you can find a list of members of the graduate school to select supervisors based on their areas of expertise.

Please select suitable professors and contact them directly. If you are interested in an information meeting, please get in touch with one of our contact persons.

Please note:

Doctorates in the graduate school are supervised by two professors, whereas the main supervisor must be a professorial member of the graduate school. The co-supervisor is generally a professor at the same higher education institution or of one of the other higher education institutions of the graduate school. In justified cases, non-members can take on co-supervision. The required pre-conditions will be laid down in the doctoral degree regulations (Promotionsordnung).

Admission to the Graduate School is based on a written application. The necessary requirements and the documents to be submitted are specified in the doctoral regulations.

The application documents are not made available on this website, but can be obtained from the professors at the Graduate School once the supervision and topic have been agreed.

All documents should be submitted electronically via e-mail to promotionszentrum-nisys[at]thws.de. Notarized documents and the form for the main application must also be submitted by post/house mail in the original.

The postal address of the Graduate School is:
Würzburg-Schweinfurt University of Applied Sciences (THWS)
CAF - Doctoral Center NISys
Münzstraße 12
97070 Würzburg

The next deadline for submitting applications is January 7th, 2026.

If you have any questions, please contact promotionszentrum-nisys[at]thsw.de.

If you want to complete your doctorate with the graduate school, we recommend the following procedure. You can already start with preparations. The requirements for admission can be found in the doctoral degree regulations (Promotionsordnung).

• Clarification of fundamental questions (motivation, framework conditions, doctorates in the graduate school or cooperative doctorate), possibly in connection with initial consultation of a doctoral service center of the involved higher education institutions:
  • Students, employees, and alumni of Aschaffenburg University of Applied Sciences: Juliane Große
  • Students, employees, and alumni of Coburg University: Dr. Renate Lucke
  • Students, employees, and alumni of the Technical University of Applied Sciences Würzburg-Schweinfurt: Dr. Simone Stork
  • All other: Dr. Simone Stork (Coordinator for the promotion of young scientists, THWS)
• Explore a topic and develop first ideas of a doctoral thesis topic
• Contact suitable professors of the graduate school and acquire them as supervisors/keep an eye on job postings at the same time (list of professorial members is available at “General information -Which areas of expertise will be covered by the graduate school?")
• Narrow down the doctoral thesis topic
• Write a thesis proposal (The doctoral degree regulations contain corresponding information)
• Enter into a supervision agreement
• Compile additionally required documents
• Submit the application for membership in the graduate school

With the launch of the graduate school, the professors involved in the application process with the Bavarian State Ministry for Science and the Arts become members of the graduate school.

Other interested professors of member institutions can apply for membership. The requirements will be laid down in the statutes of the graduate school.

The doctoral degree regulations will contain the criteria under which professorial members can supervise and review doctorates. Main and co-supervision are distinguished, the same applies to main and second evaluation.

 

 

The professorial members of the graduate school are expected to not only engage in supervision of doctoral candidates and evaluation of doctoral theses but to also contribute to the self-administration of the graduate school and to participate in networking events. One of the main quality assurance components of the center is regular exchange among the members.

• Scientific Direction: Prof. Dr. Jürgen Hartmann (THWS)

• Vice Scientific Direction: 
  • Prof. Dr.-Ing. Christiane Thielemann (THAB)
  • Prof. Dr. Christian Weindl (HSCO)

• Operative Management: Dr. Christian Lengl (THWS)

• Chair: Prof. Dr. Jürgen Hartmann (THWS)

• Members:
  • Prof. Dr.-Ing. Philipp Epple (HSCO)
  • Prof. Dr. Peter Rötzel (THAB)
  • Prof. Dr.-Ing. Markus Zink (THWS)

• Representation of doctoral candidates:
  • Patrycja Lewczuk
  • Lukas Klehr