After Google’s America’s president Tim Armstrong jumped to AOL (NYSE: TWX), now the search firm is losing its Asia-Pacific and Latin America president Sukhinder Singh Cassidy. She’s becoming “CEO-in-residence” at Accel Partners, the VC firm that’s backed Facebook, Real Networks and Glam—a role AllThingsD suggests is merely a spring board to bigger and better things.

Cassidy tells the blog: “I was at the end my streak (at Google) and ready to take the next step and run or grow my own company. It is key for me to be stepping out and spreading my wings now ... I am interested in finding a company with a lot of momentum and need for scale ... I hope the next thing I jump into will have that and also be long and enduring.” Kara suggests that Cassidy presents a prime hiring opportunity for Twitter, a company that in recent weeks seems to have accepted its growth potential. (“Here’s a way to get a little bit of Googley management without, you know, actually selling out to Google.”)

But Cassidy’s exit points to a wider issue at Google; just when will the Larry-Sergei-Schmidt triangle give up the ghost? The holy trinity that is Google’s founding life and soul shows no sign of moving on, and that means a ceiling for ambitious execs like Armstrong and Cassidy, who tells AllThingsD: “Google (NSDQ: GOOG) or any big company does not present the opportunities to pursue management prowess that you can only get as a CEO.”

Accel is sitting on a new $480 million fund. Cassidy co-founded Accel-backed online bank aggregator Yodlee, developed strategy for BSkyB (NYSE: BSY), was an Amazon.com (NSDQ: AMZN) biz dev SVP and worked in investment banking for Merrill Lynch.

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