About
Jannik is a certified German Wirtschaftsprüfer (CPA) and founder of justReporting, a registered audit firm specializing in sustainability reporting and assurance for mid-sized companies.
Many SMEs are not directly subject to the CSRD but face growing ESG data requests from OEMs and large customers through the value chain. Jannik helps these companies navigate the full journey:
- Gap analysis and double materiality assessments
- VSME and CSRD/ESRS implementation
- Independent report assurance under ISAE 3000
- Green electricity verification and supply chain assurance for international automotive OEMs
With 10+ years of Big Four experience (EY, PwC, Deloitte), university lectureships in Business Analytics and sustainability reporting, and a seat on the IDW Digital Advisory Committee, he combines regulatory depth with a practical, technology-driven approach. Advisory and assurance from a single source.
Firm
jjustReporting
Monheim am Rhein, Germany
Capabilities
Industries
CSRD experience
ExpertRelated experts
justReportingFirm
Registered German audit firm (Wirtschaftspruefungsgesellschaft) specializing in sustainability reporting and assurance for mid-sized companies. justReporting supports SMEs navigating CSRD/ESRS requirements, VSME implementation, and value chain compliance — from gap analysis and double materiality assessments through to independent report assurance under ISAE 3000. The firm also provides green electricity verification and supply chain assurance for international automotive OEMs. Founded by Jannik Hassel (10+ years Big Four experience), justReporting combines regulatory depth with a practical, technology-driven approach.
Georg Lanfermann
Präsident / President bei DRSC - Deutsches Rechnungslegungs Standards Committee e.V.
As President of the DRSC (German Accounting Standards Committee) and Vice President of the EFRAG Administrative Board, Mr. Lanfermann is directly involved in the development of the European Sustainability Reporting Standards (ESRS).
Catalina Manole
Sustainability Project Manager
Coordinates and conducts double materiality analyses, identifying significant ESG impacts and risks along the value chain, and offers strategic recommendations to enhance sustainable performance.