High-level financial employees who changed jobs frequently before the recession are expected to begin testing the waters as the economy improves in northern Nevada.Before the downturn, chief financial officers, chief operating officers and directors of finance often jumped fences to reach locations where the grass was greener, says Katie Weigel, division director for financial and accounting staffing firm Robert Half International.But as the recession descended upon the region, and companies whittled staff to bare-bones levels, people held on dearly to their jobs, Weigel says. However, she's beginning to see a shift in the financial world as executive-level workers begin targeting …