 Constellation Announces New Leadership to Propel Client Growth Through Creativity, Technology and Insights NEW YORK, April 7, 2021 PRNewswire -- MDC Partners NASDAQ: MDCA and the five MDC agencies that form the Constellation 72andSunny, Instrument, CPB, Redscout and Hecho Studios have named John Boiler to Chair the powerhouse group created a year ago. John Pyne, former CFO and COO of Geometry North America, has also joined the groups operating council as Global Chief Financial Officer to serve the network. 