Marzena has over 10 years of experience covering expert witness engagements (including assessment of potential liability and assessment of quantum in relation to damages claims), economic regulation and competition, economic modelling and econometric analysis, benchmarking, survey design and impact assessments.

Prior to joining Kroll, Marzena was part of an economics practice at a global professional services firm where she worked on advisory and litigation support assignments across numerous industries, including banking, TMT, pharma, transport and automotive. Before that, Marzena worked as an economist and finance analyst at Royal Mail Group, working alongside other business units on strategy, property and pricing projects and conducting forecasts that underpinned Royal Mail business plan. She co-authored Letter traffic demand in the UK: some new evidence and review of econometric analysis over the past decade, published as a chapter in Reforming the Postal Sector in the Face of Electronic Competition.

Marzena holds a postgraduate diploma in economics for competition law from King’s College London, an MSc in Economics from University College London and a BSc in Economics from Sussex University.