Calix expands its leadership team

<p>Communications equipment maker Calix in Petaluma expanded its leadership team with the appointment of four new executives.</p><!-- Nothing to do. The paragraph has already been output --><p>Ken Grelck is vice president of regional sales for the Eastern U.S. and Canada; Skip Hirvela was promoted to vice president of regional sales for the Western half of the U.S.; Robert Checketts is vice president of field marketing; and Todd Ortberg took the new position of senior vice president of business and market development.</p>