Zheng has been appointed managing director for Greater China. He previously held senior positions with Ogilvy & Mather, Yahoo and Renren, most recently at in-taxi media company Touchmedia as VP of marketing.
TubeMogul opened its office in Shanghai earlier this year and expects to expand its China operations next year.
Williams has worked in Asia for more than 15 years in executive roles at Nielsen, Facebook and most recently LinkedIn as head of talent solutions for SEA.
Both report to Susan Salop, vice president for Asia at TubeMogul.
"We forecast that the Southeast Asia and China video advertising markets will mature substantially in the next few years, and both Jeffery and Darin will ensure we succeed in that mission of making brand advertising more simple, accountable and transparent,” she said.
TubeMogul also has offices in Sydney and Tokyo.