Stratagem Artists has announced the expansion of its roster via not only a foray into the Canadian opera world, but with the inclusion of off-stage artists. Among those added to the company’s team are conductors Kamna Gupta, Geoff McDonald, and Robert Tweten; directors Ellen Jackson, Laine Rettmer, Marcus Shields, and Aria Umezawa; and composers Lembit Beecher, Cecilia Livingston, and Rene {…}