Tower Arch Capital LP, a Salt Lake City, Utah-based lower middle-market private equity firm, has announced that David Calder has rejoined the firm as a principal. He will be responsible for sourcing, executing and managing new and existing investments across the firm’s portfolio. Calder was a vice president with Tower Arch from 2015-17. He rejoins the firm from The Halifax Group, a middle-market private equity firm based in Washington, D.C., where he has worked since 2017, most recently as a principal. In his early career, Calder worked at Leucadia National Corp. and in the investment banking divisions of Deutsche Bank Securities and UBS Investment Bank. His education includes an honors bachelor of arts degree in economics and a bachelor of arts in Asian studies from the University of Utah.