About Us
Who We Are and Why We Do What We Do


Africa Gibb
Loan Officer
NMLS 490698

Dedication defines Africa Gibb. Raised in McAllen, TX, she started her career in the mortgage industry working in sales and marketing for one of the top developers in the area. In 2008, she moved to the lending side. She found her home at Cornerstone in 2012.

Africa has served as Governing Board member on the Women’s Council of Realtors for the past three years. She has also served on the Governing Board of the Organization of Women Executives, and has received recognition for being a TDHCA and TSHAC top lender both in the region and in Texas.

She says, “I believe that this company and everyone who works here is truly interested in what is right for our customer. I have an amazing team that provides excellent customer service, and our goal is to help customers feel at ease. The knowledge that the Cornerstone team has is beyond anything I have seen anywhere else. I am dedicated to helping our customers have transactions where they are at ease, and know that they have an entire company whose sole purpose is to help them achieve their dreams. I get to know my customer and what their needs truly are, so I can offer them the right program.”

Now living in Mission, TX, Africa enjoys spending her free time with her family.


Julie Marie Calles-Calderon
Transaction Coordinator

A lifelong resident of Edinburg, Julie loves helping her customers and community. After attending South Texas College, Julie spent six years in the title business, then worked three years as head of First National Bank’s tax department, covering 60 branches.

Wanting to help customers even further to make their dreams come true, Julie “heard about an opening and took a chance in hopes of joining the team at Cornerstone.” She enjoys learning from her experienced co-workers and being part of a tight-knit team.

She has served on the board of the Organization of Women Executives, as Membership Chair for two years, and as Hospitality Chair on the board of Women’s Council of Realtors.



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