Head of communication at Twitter Gabriel Stricker, is stepping down from his position, according to a tweet he sent out on Thursday. However, did not explain, or even allude to why he decided to leave the micro-blogging platform. Stricker began at Twitter in 2012 and formerly worked at Google. This is one of many top-ranking resignations at Twitter lately, according to Business Insider, which also included the stepping don of CEO Dick Costolo. The platform is still currently without a chief executive, leaving investors worried. For more business and financial news, click here.