Getty Images; Chelsea Jia Feng/BIJob titles in the $4.3 trillion hedge-fund industry vary greatly from firm to firm.The lack of uniformity allows both firms and employees to present themselves in the best light.A prominent example involves Greenlight and a former employee who claimed to be the head of macro.The well-publicized battle between David Einhorn's Greenlight Capital and its former employee James Fishback can seem, to industry outsiders especially, a bit trivial.While Fishback's most recent legal filing claims age discrimination and asks for at least $5 million from his old firm, the genesis of the messy dispute involves Fishback's title during the two-plus years he spent at Greenlight.He said he was the firm's head of macro.