Jon Gerretsen is managing director of Residential New Originations and Fulfillment Services at SitusAMC, where he leads large-scale operations focused on credit services and mortgage fulfillment. With a background that includes leadership roles at KPMG, Citi and Altisource, Gerretsen brings a process-driven approach to complex mortgage operations.
Over the past year, Gerretsen led the expansion of SitusAMC’s Credit Services division, which completed more than 250,000 new file reviews in 2024. His efforts helped maintain SitusAMC’s position as a top provider of mortgage due diligence. He introduced a manufacturing-inspired model based on process bifurcation and dedicated staffing, designed to increase scalability, improve service levels and retain top talent. This model has now been applied to a new line of business — Loan Fulfillment services — offering support across the origination lifecycle and extending the firm’s secondary market expertise into new territory.
Gerretsen’s impact is reflected not only in volume but in quality: his division consistently achieves a 99.52% quality score and exceeds 98.5% on service level commitments. He oversees a team of over 1,200 professionals and focuses on aligning talent with long-term client needs. This approach has improved both customer satisfaction and internal team engagement.
Gerretsen’s leadership style emphasizes strategy, accountability and client experience. By building systems that scale across multiple business lines, he’s helped shape the company’s broader strategic direction and reinforced its reputation for operational excellence. His recent work on launching loan fulfillment services highlights his ability to adapt successful models across different segments of the mortgage process.
Name:
Jon Gerretsen
Title:
Managing Director, Residential New Originations and Fulfillment Services
Company Name:
SitusAMC
