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The Commerce & Logistics Specialists


Meet the logistics specialists helping digital commerce & logistics industry stakeholders stay ahead

Walter Trezek

logistics support

Walter Trezek has over 35 years’ experience as a consultant in the digital commerce & logistics industry.

His official positions include Chairman of the Consultative Committee (CC) of the Universal Postal Union, CO-Chair of Ecommerce Europe responsible for eLogistics, and advisor to the European Commission (Logistics, VAT, Customs, Postal Market), where he is actively involved in a range of standardization issues (UPU, ISO, CEN, ETSI) and shaping this business environment.

Walter literally grew up in the postal industry, working for the family company, a distributor of franking and inserting machines throughout Central and Eastern Europe. After gaining his Master’s in Law from the University of Vienna, Walter joined Stamps.com, the Silicon Valley internet start-up and inventor of the digital stamp where he was Senior Consultant and a member of their successful 1999 IPO team. In 2000 Walter was invited to become Head of Technology & Head of Sales at Austria Post where he contributed to the restructuring of the organization.

In 2004, he founded Document Exchange Network, offering boutique consultancy services to stakeholders in the commerce & logistics industry under the CLS brand. He is a popular speaker & moderator at global industry events and conferences, and is regularly called up by journalists and asked for his take on industry developments.

Martin Füll

logistics support

Martin Füll is an expert in postal IT systems (UPU: IPS; CDS; PEG), tariffs & cost models in the postal & logistics world, and the European postal & CEP market, and has built up over 20 years of consulting experience in market research & forecast models, applied postal & ICT law, cost accounting, IT project management and logistics.

With a Master’s in Business Economics from the Vienna University of Economics and Business, Martin started his career in marketing and IT/Database Management before joining Austria Post where he first met Walter Trezek.

At CLS he has acted as MD (interim management) for several companies, and assumed responsibility for global tariff management, setting-up & redesigning a multi carrier / multi-channel ecommerce IT platform managing 100+ postal and courier/parcel/express companies (and their tariffs), and combining postal & freight customs clearance. He has lead projects including designing and developing software/middleware for the logistics industry, establishing ETOEs, and optimising processes & costs for cross-border ecommerce stakeholders.

Rainer Franke

logistics support

Rainer Franke is a specialist with 20+ years' insurance industry background in corporate management & development, strategy, planning, IT & organization, with international and multicultural experience, and a strong background in compliance and governance. Key project leads include implementing corporate & multinational HW&SW solutions, ISO 27001, 9001, 20000, and AI projects, as well as corporate restructuring in Eastern Europe.

Rainer is qualified in International Contract Law/EU Law, Corporate Finance, Money, Banking & International Finance, International Accounting, and the Management of multinational companies, and holds an executive MBA, a Master’s in Law & Economics (MLE) and Law (LLM) from IMADEC University in Vienna, as well as a degree in Economics from the Vienna University of Economics and Business.

His roles to date include a decade as CPO at Generali Holding Vienna AG, responsible for Group Procurement IT and Controlling, as CPO/IT Controlling Officer at the Vienna Insurance Group AG Wien, and CIO for Vienna Insurance Group Romania.

Sid Hart

logistics support

Sid Hart has been at the forefront of innovation in the post, transport and logistics markets with a particular focus on disruptive technologies and software for the past ten years. As a c-suite executive and consultant he is experienced in managing international operations and corporate development, including the expansion of high growth tech businesses.

Sid brings to CLS a particular passion for optimizing the customer experience, whether at a corporate or retail level, paired with in-depth knowledge of user experience, CSat metrics, and international logistics.

He started his career in transportation intelligence with the Royal Air Force, and in 2012 was involved in the logistics planning for the London 2012 Olympics. He holds a BA, MBA, and accredited directorship courses from the UK's Institute of Directors. He has led large teams and companies across time zones and geographies, representing business internationally with governments and legislative bodies, and managing multi-million pound sales and projects.

How can our logistics specialists help you?

Contact us to explore how the CLS team can help you make the most of the emerging opportunities in the digital commerce & logistics sector.