Thanks to our own salaried and highly qualified cyber security experts we are your trusted partner for first-class cyber security services.

40+ highly qualified cyber security experts – including certified penetration testers (OPST, OPSA, OSCP, OSCE, GXPN), digital forensics specialists (ISO 27035, CERT-CSIH, GCIH, GCFA, GCFE, GREM, GNFA), ISO security auditors (ISO 27001 Lead Auditor, ISO 27005 Risk Manager), Lead Incident Manager (ISO 27035 Incident Manager) and IT security researchers – solve your most demanding information security challenges.

For quality reasons all our services are provided by our own salaried certified security specialists.

Christoph Baumgartner
CEO Oneconsult AG & Chairman Oneconsult International AG
Senior Security Consultant & IT Forensics Specialist

MSc UZH IS, ISO 27001 Senior Lead Auditor, OPST

Christoph Baumgartner founded Oneconsult AG in 2003 and has been Chief Executive Officer since. Together with Tobias Ellenberger he represents the operative management of Oneconsult group and heads the management team. Christoph is responsible for consulting, human resources, marketing, finance and administration. He holds a master’s degree in information systems from the university of Zurich and since 1996, he has been working as a consultant focusing on IT security and IT strategy with many years' experience as a project manager and consultant in a wide range of industries. Before setting up Oneconsult, Christoph has held a number of management positions at various respected system and security integrators. He specializes in ISO 27001 und ISO 27002 security audits, security guidelines and concepts, IT forensics as well as strategic consulting. Christoph is a certified ISO 27001 Senior Lead Auditor, an OSSTMM Professional Security Tester (OPST) and an ISECOM board member.

Tobias Ellenberger
COO Oneconsult AG & Vice Chairman Oneconsult International AG
Senior Security Consultant, Senior Digital Forensics & Incident Response Specialist

Mediamatiker EFZ, OPSA, OPST

Tobias Ellenberger is Chief Operating Officer at Oneconsult AG and a member of the operational management. From 2017 to 2020, as Chief Executive Officer of Oneconsult Deutschland GmbH, he successfully managed the continuous development and growth of the company. Together with Christoph Baumgartner, he is in charge of the strategic and operational management of the Oneconsult Group. Tobias is responsible for Digital Forensics & Incident Response (DFIR), account management and strategic projects throughout the group. He also shares his expertise as a regular speaker at universities, trade fairs, customer events and seminars. He advises key accounts on the topics of cyber security and incident response and has held several positions as Chief Information Security Officer (CISO). Before joining Oneconsult in 2010 as a penetration tester and security consultant, he worked for various international companies in the fields of engineering and consulting. Tobias Ellenberger heads the CSIRT of Oneconsult International AG (OCINT-CSIRT). He is Vice President of the Swiss Cyber Experts Association and a member of the «Cyber Security» commission of ICT Switzerland.

Tobias Castagna
Chief Technical Officer Oneconsult AG
Senior Penetration Tester & IT Forensics Specialist

BSc FH CS, GCFA, GCFE, OPST

Tobias Castagna is Chief Technical Officer at Oneconsult AG and has been a member of the extended management team since 2015. He is responsible for penetration testing. Tobias attended university at the Scuola Universitaria Professionale della Svizzera Italiana (SUPSI), and then at the Berner Fachhochschule (BFH) in Biel focusing on IT security. In 2009 he started at Oneconsult as a penetration tester and became a team leader in 2012 and department head in 2015. Tobias specializes in malware incident response and digital forensic investigations as well as penetration tests of (web) applications and mobile apps. He is a GIAC Certified Forensic Analyst (GCFA), a GIAC Certified Forensic Examiner (GCFE) and a certified OSSTMM Professional Security Tester (OPST).

Jan Alsenz
Chief Research Officer Oneconsult AG
Senior Penetration Tester & Security Consultant

MSc ETH CS, OPSA, OPST, OSSTMM Trainer

Jan Alsenz has been a member of the extended management team since 2010 and Chief Research Officer since 2015. He leads the research team at Oneconsult, which analyzes and develops new exploits and attack scenarios, and publishes security advisories and specialist IT security articles. After his master’s degree in computer science at ETH Zurich, Jan joined Oneconsult in 2009 and has since been active in penetration testing and security consulting with a special focus on sophisticated technical audits (e.g. APT and SCADA), code reviews, reverse engineering, exploit development and training. Jan is a certified OSSTMM Professional Security Tester (OPST), OSSTMM Professional Security Analyst (OPSA), OSSTMM trainer and member of the ISECOM Core Team.

Rafael Scheel
CEO Oneconsult Deutschland GmbH
Senior Penetration Tester, Digital Forensics Specialist & Security Researcher

BSc BIT, OSCP, GREM, OPST

Rafael Scheel finished his IT apprenticeship at the ETH Institute for Snow and Avalanche Research with a thesis on intrusion detection systems in 2011. Afterwards, he enrolled at the Lucerne University of Applied Sciences and Arts to study business information technology and gained his BSc BIT degree in September 2015. At the beginning of his studies he worked part-time in the field of network security for a leading Swiss IT security vendor. In March 2014, Rafael joined Oneconsult focusing on penetration testing and security research with an emphasis on exploit development and became branch manager Munich in June 2017. In October 2020, he became the CEO of Oneconsult Deutschland GmbH. He is an Offensive Security Certified Professional (OSCP), holds the GIAC Reverse Engineering Malware (GREM) certificate and is an OSSTMM Professional Security Tester (OPST).

Frank Ully
CTO Oneconsult Deutschland GmbH
Senior Penetration Tester & Security Consultant

MSc SecMan, MSc KMM, OSCE, OSCP, CRTP, GREM, GCFA, OPST, Auditor & Implementer nach ISO 27001

Frank Ully has studied Technical Communication at the Karlsruhe University of Applied Sciences and graduated with a diploma degree (now equivalent to a master in Communication and Media Management). While still a student, he set up the Corporate Communications and Documentation department of a Berlin-based software manufacturer and headed it for several years. Later, Frank was responsible for internal user systems and IT security. He has studied Security Management with a specialization in IT security at the Brandenburg University of Applied Sciences and was certified as an Offensive Security Certified Expert (OSCE) and Offensive Security Certified Professional (OSCP). Frank also holds the Certified Red Team Professional (CRTP), GIAC Reverse Engineering Malware (GREM) and GIAC Certified Forensic Analyst (GCFA). He is a certified OSSTMM Professional Security Tester (OPST) and Auditor & Implementer nach ISO/IEC 27001. At the end of his master studies, in November 2017, he began working as a penetration tester and security consultant in Munich. In April 2018 he became a senior penetration tester and security consultant and was promoted to Chief Technical Officer of Oneconsult Deutschland GmbH in October 2020. He regularly gives talks and publishes articles in professional journals such as iX.

Angela Castagna
Head of HR
Finance Senior Specialist

After receiving her certification at the Hotel Management School in Lucerne in the field of business administration and corporate management, Angela Castagna worked for several years as an executive assistant for international corporations and was most recently a team leader and executive assistant to CEO of a leading international consulting company in the field of occupational pensions. Since August 2014 she has been working at Oneconsult in the fields of HR and Finance, since January 2020 Angela has been Head of HR.

Zeynep Knobel
Head of Resource & Backoffice Management
Dipl. Betriebswirtschafterin HF

After finishing her commercial education at a vocational high school, Zeynep Knobel (ex Coblar) studied at the business school in Rapperswil where she gained her Advanced Federal Diploma of Higher Education in Business Administration. Before joining Oneconsult in March 2015, she worked as a managing clerk and sales manager for a transport organization and two international trading companies. Since July 2016, Zeynep has been leading the back-office team and is responsible for proposal management, project planning as well as invoicing.

Fabian Schewetofski
Head of Consulting & Information Security and Safety Officer
Senior Security Consultant & Penetration Tester

MSc ETH CS, ISO 27001 Auditor, ISO 27005 Risk Manager, GCFE, OSCP, OPST

Fabian Schewetofski completed his Master in Information Security at ETH Zurich in spring 2017. Since April 2017, Fabian has been employed at Oneconsult as a security consultant and penetration tester. Fabian's areas of expertise are business continuity management and the strategic orientation of information security. Since October 2018, he has held the role of Information Security & Safety Officer and since March 2020 he has been in charge of the consulting unit. Fabian is an ISO 27001 Auditor, ISO 27005 Risk Manager, GIAC Certified Forensic Examiner (GCFE), Offensive Security Certified Professional (OSCP) and a certified OSSTMM Professional Security Tester (OPST).

Thomas Tunkel
Head of Sales

Thomas Tunkel has many years of managerial experience in the service industry in the German- and English-speaking world. Beginning in 1999, he turned to strategy implementation and gained experience in sales, customer orientation and management. Thomas is a lecturer for sales, project management and organization at various colleges and educational institutes and joined Oneconsult in April 2017 as a Security Sales Executive. He has been Head of Sales since August 2017.

Gregor Wegberg
Head of Digital Forensics & Incident Response
Manager OCINT-CSIRT, Senior Consultant

MSc ETH CS, CAS in Leadership Basic IAP, ISO 27001 Senior Lead Auditor, ISO 27035 Lead Incident Manager, OSCP, OPST, OPSA, eCDFP, PSM I, PSPO I, OCAJP8, Microsoft Certified Azure Fundamentals

After his IT apprenticeship with a focus on software development at a Swiss financial service provider, Gregor Wegberg decided to study computer science at the Swiss Federal Institute of Technology (ETH) in Zurich. During his studies, he specialized in information security and worked as a teaching assistant taking care of the ETH course “Applied Security Lab”. Furthermore, Gregor was employed as a part-time software engineer, being in charge, amongst others, for the requirements analysis and implementation of a solution for a large private bank. After graduating with a master’s degree in computer science (MSc ETH CS), he joined Oneconsult in January 2017 as a penetration tester and security consultant and was promoted to senior security consultant & penetration tester in December 2017. Since February 2020 he has been Head of Digital Forensics & Incident Response. Gregor Wegberg holds a Certificate of Advanced Studies in Leadership from the IAP of the ZHAW, is a certified ISO 27001 Senior Lead Auditor, ISO 27035 Lead Incident Manager, Offensive Security Certified Professional (OSCP), OSSTMM Professional Security Tester (OPST), OSSTMM Professional Security Analyst (OPSA), eLearnSecurity Certified Digital Forensics Professional (eCDFP), Professional Scrum Master I (PSM I), Professional Scrum Product Owner I (PSPO I), Oracle Certified Associate and Java SE 8 Programmer (OCAJP8) and also holds a Microsoft Certified Azure Fundamentals certificate.

Marco Wohler
Head of IT
System Engineer & Penetration Tester

Informatiker EFZ, GCED, OPST

Marco Wohler has been responsible for the smooth operation of Oneconsult's internal IT infrastructure since November 2014. He has headed the IT team since October 2016. In this function, Marco and his team designed and implemented the various generations of the IT infrastructure. In customer projects and internally he gained extensive experience in the defense of systems and companies. As a counterpart to the penetration testing teams, which focus on attack scenarios, Marco is a sought-after specialist for the protection of IT systems. He is a GIAC Certified Enterprise Defender (GCED) and a certified OSSTMM Professional Security Tester (OPST).

Yves Kraft
Branch Manager Bern
Senior Penetration Tester & Security Consultant

BSc FH CS, ISO 27001 Lead Auditor, OSCP, OPST, OPSA & OPSE, CTT+, SVEB 1, OSSTMM Trainer

After his IT apprenticeship in the public administration, Yves Kraft worked as a system engineer for an IT service provider in financial services and public administration among other industries. Next, he studied computer science at the Berner Fachhochschule in Biel with a focus on IT security, while working for a large Swiss university as a system administrator. Since February 2011, Yves has been working as a security consultant at Oneconsult, focusing on penetration tests, security consulting and training. He was promoted to team leader in 2013 and branch manager Bern in 2015. Yves is an Offensive Security Certified Professional (OSCP), a certified OSSTMM Professional Security Tester (OPST), OSSTMM Professional Security Analyst (OPSA), OSSTMM Professional Security Expert (OPSE), OSSTMM trainer, ISO 27001 Lead Auditor and CompTIA Certified Technical Trainer (CTT+) and owns the SVEB certificate (Level 1).

Claudio Anliker
Team Leader Penetration Testing
Senior Penetration Tester

MSc UZH in Informatics, OSCE, OSCP, OPST

Claudio Anliker studied computer science at the University of Zurich and gained his master's degree (MSc in Informatics UZH). The focus of his bachelor studies was the development of software systems. During his master, Claudio focused on information security. Claudio has been working as a penetration tester at Oneconsult since May 2016 and became a senior penetration tester in April 2018. Due to his achievements he was promoted to Team Leader Penetration Testing in November 2019. Claudio is an Offensive Security Certified Expert (OCSE), an Offensive Security Certified Professional (OSCP) and a certified OSSTMM Professional Security Tester (OPST).

Fabian Gonzalez
Team Leader Penetration Testing
Senior Penetration Tester

BSc FHO CS, GXPN, OSCE, OSCP, OPST

Fabian Gonzalez completed his apprenticeship in information technology with a focus on systems engineering at a Swiss major bank. During this time, he worked for one and a half years in the Security Operations Center (SOC). Afterwards Fabian studied information technology at the University of Applied Sciences Rapperswil and graduated in 2014 with a BSc FH degree in computer science. He then worked at one of the „Big Four” auditing companies as an information security consultant. Fabian joined Oneconsult in January 2016 as a penetration tester and became a senior penetration tester in April 2018. Due to his achievements he was promoted to Team Leader Penetration Testing in November 2019. Fabian is a GIAC Exploit Researcher and Advanced Penetration Tester (GXPN), an Offensive Security Certified Expert (OSCE), an Offensive Security Certified Professional (OSCP) and a certified OSSTMM Professional Security Tester (OPST).

Lena Reitzle
Technical Communicator & Marketing Manager
BA Translation, state-certified translator/interpreter

Lena Reitzle completed her training as a state-certified translator and interpreter at the Würzburger Dolmetscherschule. In addition to this training, she enrolled at the University of Applied Sciences Würzburg-Schweinfurt, graduating in 2015 with a B.A. in Translation (Technology). Lena gained her first practical experience during a semester abroad in Sheffield. After her studies she moved to Munich where she worked as a translator with project responsibility in an international translation agency for several years, being responsible for various clients. In July 2020, Lena Reitzle joined Oneconsult as Technical Communicator & Marketing Manager.

Philipp Hauenstein
Senior Security Sales Executive
MA UZH, ISO 27001 Provisional Auditor, ISO 27035 Provisional Incident Manager, OPSE

During his studies of political science at the University of Zurich and the Military Academy at the ETH Zurich (2003-2009) Philipp Hauenstein focused among other topics on military and security policy in the information age. He was especially interested in the potential of attacks from cyberspace. At the same time Philipp Hauenstein developed a strong technical affinity for the protection of communication channels due to his honorary activities for the security community in the German-speaking area. After his employment as Sales Representative for the distribution of secure VoIP solutions and an excursion as a speaker for communication security, he worked for a large telecommunications provider until the end of 2013, where he was responsible for the sale of comprehensive communication solutions. Since January 2014, Philipp Hauenstein has worked at Oneconsult primarily as Security Sales Executive, focusing on customers interested in Incident Response & IT Forensics services (SLA and 24/7 coverage, readiness assessments, training). He is a certified ISO 27001 Provisional Auditor, ISO 27035 Provisional Incident Manager and certified OSSTMM Professional Security Expert (OPSE).

Peter Oberholzer
Security Sales Executive
PR Berater SPRI

Peter Oberholzer's affinity for information technology started in 1984 and has been a recurrent theme in his professional career ever since. His background in public relations and interest in IT security finally led him to Oneconsult, where he has been working as a security sales executive since September 2006.

Lorella Mistretta
Deputy Team Leader Backoffice
Kauffrau EFZ

Lorella Mistretta finished her commercial apprenticeship in summer 2017 working in administration and services. She joined Oneconsult in September 2017 and is the contact person for various customer issues. Lorella has also been deputy team leader of the back-office team since November 2018.

Marisa Fagagnini
Back Office Manager
Kaufmännische Angestellte

Marisa Fagagnini finished her commercial education in 1996. After that she spent one year abroad in the USA and then worked in various industries. Amongst others, Marisa was employed in the financial sector where she advised customers, was responsible for the training of apprentices and acted as deputy of the team leader. Most recently, she worked as an executive assistant at an SME. Since July 2016 she has been employed as an office manager at Oneconsult, where she is a point of contact for diverse customer requests.