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 — from gap analysis and double materiality assessments through VSME and CSRD/ESRS implementation to independent report assurance under ISAE 3000. He also leads green electricity verification and supply chain assurance engagements 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.
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