Executive search firm adds partner

William R. Matthews joined Higdon Partners as a partner, said Henry G. Higdon, managing partner of the executive search firm. Mr. Matthews will open a Boston office for the firm, which focuses on the asset management industry. Mr. Matthews had been a managing director on the financial services team of executive search firm Conley & Co. His responsibilities have been assumed by the other six members of the team for now, said Kevin Conley, president and CEO of Conley & Co.