Patrick Welch will resign from his position as chairman, president and CEO of the National Life Group, a cluster of financial services and insurance companies that includes the Sentinel Family of Mutual Funds. Welch is leaving the company to become president of CIGNA HealthCare.

At Cigna, he replaces William Pastore, who is leaving the firm to pursue "other opportunities," Cigna said in a statement. Pastore had been president of Cigna since 1999.

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