After a stint of over four years, Manish Porwal, Managing Director, West and South, Starcom Worldwide, has put in his papers. Porwal would be at Starcom Worldwide till the end of this year. Prior to being the MD for the West and South regions, until December 2006, Porwal was looking after the western region for Starcom. Nikhil Rangnekar, who was recently elevated as ED for West, will take formal charge on December 1, 2007. Ravi Kiran, CEO-South Asia, Starcom MediaVest Group has informed that Porwal’s replacement at Starcom Worldwide, India-West & South, would be announced soon.