Complex sentence: Gross is a columnist for "Alexa Luxe Living", a quarterly supplement to the "New York Post", the Real Estate Editor and a monthly columnist for "Avenue" Magazine and a contributing editor of "Travel and Leisure" magazine.
Split into simpler sentences: Gross is a columnist for "Alexa Luxe Living", a quarterly supplement to the "New York Post". He is also the real estate editor and a monthly columnist for "Avenue" magazine and a contributing editor of "Travel and Leisure" magazine.