Intuit's Firm of the Future website calls her "one of the elite few members of the Intuit Trainer/Writer Network." She founded her firm in October 1992 and became involved with QuickBooks in 1994. Sleeter noted she taught seminars for the Sleeter Group from 1998 through 2000 and developed some certifications for QuickBooks and QuickBooks Online. Nagayama had been the Sleeter Group's chief QuickBooks consultant since 2004 and was "Widely known as one of the best experts on QuickBooks," Sleeter said. She was an Advanced Certified QuickBooks ProAdvisor, and Certified QuickBooks Enterprise ProAdvisor. Her LinkedIn profile noted she had written and recorded numerous courses for the Intuit Academy and the ProAdvisor Certification Team.