Complex sentence: Slant is managed by CEO and publisher Aviram Elad, who used to work for Haaretz and Walla, with the newsroom operating under Editor in Chief Amanda Gutterman, previously of Huffington Post.
Split into simpler sentences: Slant is managed by CEO and publisher Aviram Elad, who previously worked for "Haaretz" and "Walla". The editor in chief is Amanda Gutterman, previously of Huffington Post.