PolySign, a U.S.-based provider of blockchain-enabled digital asset infrastructure for institutional investors, has appointed Chuck Ocheret as its new chief technology officer, based in New York. He was previously CTO at Symbiont. The PolySign family includes MG Stover and Standard Custody & Trust Co. MG Stover is an alternatives fund administration firm, whilst Standard Custody & Trust is a qualified custodian offering patented technology for securing secret keys.