Siobhan "Vonnie" Costello

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I joined DHI Mortgage in 2012, beginning my career as a loan processor before transitioning into a Mortgage Loan Originator role in late 2013. My experience on both sides of the mortgage process has given me a strong foundation for helping homebuyers understand their financing options and navigate the loan process with confidence.

Throughout my career, I’ve had the privilege of helping thousands of homebuyers and have qualified for DHI Mortgage’s President’s Club for a majority of my career. This means I handle a large production volume with quality care while making sure my customers are happy! My approach is simple: “Teamwork makes the dream work.” I strive to provide clear communication, dependable service, and a smooth loan experience from application through closing.

I grew up in Rowlett, Texas, and graduated magna cum laude from the University of Arkansas with a degree in finance. Outside of work, I enjoy spending time with my family, traveling, reading (my reading goal for this year is 60 books), and hanging out with my dogs, Hugo, a French bulldog, and Eddie, an American bulldog rescue.