During Marostica's first months in the position, he helped lead Colorado's effort to keep Frontier Airlines jobs in Denver following its merger with Republic Airways; ultimately, Frontier moved several hundred jobs, and Frontier's headquarters, to Wisconsin and Indiana, which offered greater tax and economic incentives. When legislators proposed eliminating business tax credits in late 2009 to help balance the states budget, Marostica publicly defended many of those credits, but he did support limited cuts to tax credits in Governor Ritter's proposed 2010–2011 budget.