Christian Thwaites has stepped down as president and chief executive officer of Montpelier, Vt.-based Sentinel Asset Management to pursue other opportunities, according to the firm.

In his stead, Thomas Brownell, National Life Group’s chief investment officer and a senior vice president of Sentinel Asset Management, will serve as the interim CEO of Sentinel Asset Management while the firm searches for a new CEO.

“Christian came to National Life Group in 2005 with a mission to build a strong asset management firm for the company,” stated Mehran Assadi, the president and chief executive officer of National Life Group, parent company of Sentinel. “We are very proud of Sentinel and its reputation in the marketplace today.”

Prior to joining Sentinel in 2005, Thwaites served as chief executive officer Skandia Global Funds, a UCITs fund company that sold its products in Asia, Latin America, Europe and the U.S. Thwaites could not be reached for comment on his departure.

Sentinel Investments’ assets under management totaled more than $26.4 billion as of March 31.

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