[1] Previously, he held the positions of CEO at Citrix Systems[2] and Executive Vice President of Microsoft Business Solutions.

[4] Tatarinov began his career working for several systems, networking, and consulting companies in the Soviet Union, Israel, and Australia.

[6] In 1991, he co-founded Patrol Software in Australia, which made a database and systems management product.

[6] overseing Microsoft Dynamics Customer relationship management and Enterprise resource planning software.

[11][12][13] Later that year,he reorganized Citrix and spun off the company's GoTo line of video conferencing products.