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About us

The Single Close Construction suite of home loan construction products was developed by GSF Mortgage Corporation (GSF) and its President, Chad Jampedro.

GSF is a Midwest-based full-service lender licensed in over 32 states and Washington, D.C. The inventory shortage and the availability of single-close or one-time close loans with higher loan-to-value (LTV) ratio limits, allowing consumers to make low down payments, were drivers behind the Single Close Construction product line.

The company's Construction Lending Division team is trained at the highest level to offer FHA, FNMA, USDA, VA, and Jumbo — Single Close Construction to Perm loans. Additionally, the Construction Lending Division team is trained to review and approve the project budget, plans, specifications, and disbursements of all draws in-house, adding an additional layer of service and protection for our partners. GSF offers a Single Close Construction option for all mainstream products, which allows our approved partners to expand their ability to finance new construction to a greater pool of buyers.


Meet Our Leaders

With an assortment of accessible loan programs and an ever-growing team of experienced construction experts, we'll help secure the right solution for your project.


Bruce Olster

Senior Managing Director - Construction Lending Division


Rudy Marquez

Managing Director - Construction Lending Division


Robert Stephens

Senior Vice President of Construction Sales

Mark Jensen-1

Mark Jensen

Construction Lending Risk Manager


Ready to get started?

Learn how you can become an approved TPO client and discover benefits of working with our team.

Our Story

Our Story

In 1995, Midwest-based founders Phil Siebert and Jim Guzanick, created GSF Mortgage Corporation (GSF). In 2001, GSF transformed its business model from a brokerage into a full-service direct mortgage lender and the company expanded its reach to multiple states across the country.

More than two decades later, GSF continues to be recognized for its dedication to customers and utilizes state-of-the-art technology, customized loan programs, and a customer-focused lending process. Two years ago, GSF launched its Single Close Construction loan solution in the marketplace and continues to add approved clients to originate and participate in its acclaimed program.


Our Benefits

  • No re-qualification of the borrower at the completion
  • Perm rate locked upfront with a one-time close
  • Rate Float Down option at completion
  • No payments during build on FHA, VA, and USDA
  • One appraisal
  • One set of closing cost
  • GSF manages all draw administration internally (no outside parties)
  • FHA to 96.5% LTV
  • VA to 100% LTV
  • USDA to 100% LTV
  • Conventional Fannie Mae up to 95% LTV
  • Jumbo up to 90% LTV

Our Technology

We offer a Cooperative Style Lending Platform. Our approach is not to take away the essence of the organization but to share operational, legal, underwriting, regulatory and compliance resources.

GSF offers a suite of systems that helps to streamline the loan process while staying within regulations and compliance. 

"We are realizing a drastic reduction in cycle times and are closing loans faster. We are now able to compete with some of our bigger competitors."

- Client Testimonial