Vocus NZ float: More details of New Zealand listing leak 21 Jan, 2021 04:32 AM 5 minutes to read Vocus NZ chief executive Mark Callander, who also services as CEO of Vocus Group's wholesale operation across the Tasman and sits on the ASX-listed company's board. Photo / Leon Menzies Vocus NZ chief executive Mark Callander, who also services as CEO of Vocus Group's wholesale operation across the Tasman and sits on the ASX-listed company's board. Photo / Leon Menzies ASX-listed Vocus Group will begin a non-deal roadshow in about three weeks to promote an IPO for its New Zealand operation, according to a report in The Australian's Dataroom gossip column.