Joseph Sigelman

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Joseph Sigelman co-heads PetroTiger (, the over 2,400-professional company he co-founded along with his business partner, Knut Hammarskjold, in 2007. PetroTiger includes two major divisions, Hydrocarbon Field Services and Engineering & Construction.

Investor Type: Individual

Companies: Rypple

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    About: I work at Phase One Accelerators and you can find me on and at Brian Longest on LinkedIn.

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