Assurance Audits on Controls at a Service Organization (IDW PS 951/ISAE 3402/SOC2)
Consulting on setting up Internal Control Systems
Consulting on setting up Tax Compliance Management Systems
GoBD-Compliance
Audit and Consulting on the Compliance of IT Systems with Commercial and Tax Law (GoB/GoBD)
Analysis and Audit of IT-supported Business Processes
Consulting on the introduction of new software, especially for electronic invoice processing, document management, travel expense management, cash register systems
Consulting and Preparation of Procedural Documentation (“Verfahrensdokumentation”)
IT Audits within Audits of Financial Statements (IDW PS 330/ISA 315)
Assurance Engagements other than Audits of Financial Statements (IDW PS 860/ISAE 3000)
Audit of AI Systems (Artificial Intelligence) (IDW EPS 861)
Software Audits (IDW PS 880)
Project-accompanying Audits (System Introduction, System Change) (IDW PS 850)
Data Analysis
IT-Auditor (IDW)
Certified Information Systems Auditor (CISA)
Certified in Risk and Information Systems Control (CRISC)
Specialist subject
Various lecturing and publishing activities
07/2020: „Aus der Prüfungspraxis – Die Stunde des IT-Auditors“, idw Life, Juli 2020, Nr. 07
2019: Lamm/Mannes, SAP®-IT-Prüfung im Rahmen der Abschlussprüfung, IDW Verlag, Düsseldorf, 2019 (Buch)
2018: Tritschler/Lamm, Jahresabschlussprüfung bei Outsourcing und Cloud-Computing, IDW Verlag, Düsseldorf, 2018 (Buch)
2018: Lamm/Mannes, Datenanalyse in der Abschlussprüfung, in: Petersen/Zwirner, Handbuch Bilanzrecht, Abschlussprüfung und Sonderfragen in der Rechnungslegung, Bundesanzeiger Verlag, Köln, 2. Auflage, 2018, S. 387-416.
Participation in working groups of the IDW (IT-Mittelstandsinitiative) and the ISACA specialist group “SAP”