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Deborah Temkin

Deborah joined MDD Forensic Accountants Chicago office in 2025. She is a Managing Director- with focus on Disputes and Litigation.

Deborah spent most of her career at a Big 4 firm, working in the forensic accounting and litigation dispute areas in Chicago and in Johannesburg, South Africa.

Prior to joining MDD, she was a Managing Member and Co-Founder of a forensic accounting firm that specialized in expert witness testimony, litigation support & investigative services. With almost 30 years of consulting and accounting experience, she has experience working internationally, across cultures, languages, and time zones to consult with law firms, in-house counsel, C-Suite executives, senior corporate management, and corporations of all sizes, including Fortune 500 companies.

Deborah focuses on the quantification of economic damages related to fraud and investigations, anti-corruption, ethics and compliance, bankruptcy, and marital disputes.

She has provided expert witness testimony in U.S. federal court and has worked across diverse industries including manufacturing, construction, higher education, retail, life sciences, professional services, and automotive.

A recognized thought leader, Deborah has delivered numerous seminars and workshops on marital disputes, e-discovery and investigations/fraud awareness. Her published work includes the article “Benchmarking Your Whistleblower Hotline” in the Business Crimes Bulletin and the Society of Corporate Compliance and Ethics Journal.

Deborah holds a Bachelor of Commerce from the University of the Witwatersrand, an Honors degree in Accounting Science from the University of South Africa, and a Master’s in management international (Summa Cum Laude) from the University of Phoenix. She is fluent in English, proficient in Afrikaans, and conversational in Dutch.

David Maritz

David joined MDD Forensic Accountants’ Auckland, New Zealand office in 2013. He is a Partner at the firm, overseeing the Australasia region.

David has over twenty years of economic damage quantification experience. He helped establish the first specialist forensic accounting/claim preparation consultancy in New Zealand and has held senior management positions at some of the region’s top forensic accounting firms.

David’s professional practice focuses on matters related to business interruption, lost profits, fidelity claims, fraud, and natural disasters. Additionally, he has a wealth of experience in the catastrophe services area. This includes assignments resulting from the Auckland power outage, Fiji floods, Canterbury earthquakes, Queensland Floods, Japanese tsunami and Thailand floods. 

David has managed losses in New Zealand, Australia and throughout Asia.

He has participated as an expert witness on quantum in arbitrations and has serviced as an expert advisor on quantum in numerous mediations.

David graduated from the University of Natal, South Africa with Bachelor of Commerce and Bachelor of Laws degrees. He also completed a Postgraduate Diploma in Business Studies (Dispute Resolution) at Massey University, New Zealand.