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About me

I’m Greg Mattern of Team Mattern. Team Mattern has an unwavering commitment to service, both to our borrowers and our partners.Read more

I’m Greg Mattern of Team Mattern. Team Mattern has an unwavering commitment to service, both to our borrowers and our partners. Since 2013 The Mattern Team has built our business around very simple practices: consistent communication, exceptional service, clear expectations and (of course) closing on time. With many years as a licensed mortgage professional, we have seen the full cycle of economic trends, and take very seriously our role as a trusted advisor to help you plan for all eventualities with the utmost professionalism and integrity.

Our in-house processing, underwriting and closing continue to be an advantage in the market, allowing us to respond and act quickly, ultimately keeping the customer service experience positive and fun. We are also a direct lender to FNMA and FHLMC, with the ability to offer correspondent and broker channels for more complex and unique situations. We offer a wide range of financing options at Guild including Conventional, VA, FHA, USDA, JUMBO and Manufactured Home financing options. I personally specialize in helping first time buyers that may be seeking down payment assistance options, self-employed borrowers and divorcing clients.

The home buying process can be challenging if you don’t have the right team behind you. My team and I take the worry out of the process so you can enjoy preparing for owning your dream home.

In my spare time, I love spending time with my wife, our 3 grown children and 3 Grandchildren. My wife, Denise Mattern, and I also enjoy traveling and hiking with our 2 Bernadoodles, Ollie and Cooper and entertaining friends and family as often as possible. My family is my top priority in life, they motivate me to be a better man, father and human being. They are the “why” that drives me each and every day. Also, I have been blessed both personally and professionally in my life and feel a strong commitment to my communities. I spend much of my free time with several international charities both on the local and larger scale.

Team Mattern is excited to work with you! Thank you in advance for putting your trust in us!

Awards

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Causes and Memberships

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Testimonials

4.95 (317 reviews)
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4.9
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5.0
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5.0
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5.0
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5.0
Clear communication, available to answer questions, willing to run scenarios for us.
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Samantha

July 9, 2026

Fraser, CO

My husband and I have used Greg and his team for a mortgage and refi. They are all very personable and extremely easy to work with. They are experts in the mortgage business and are so qualified that you can depend on them wholly and they will never steer you wrong. My husband is good with finances and keeping track of what goes on in the economic world, but I, unfortunately, am completely illiterate. If I didn’t have my husband, I know Greg and his team would always have my back and keep my best interests at heart. You can’t go wrong with Guild Mortgage and Greg Mattern!
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Laura G.

July 1, 2026

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Meet our team

I work closely with my team of specialists to get you the financing you need. See what each member brings to the team.

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Denise Mattern

Originating Loan Officer Assistant l NMLS #1627784

I have over 25 years’ experience in the mortgage industry. I was a processor for most of my mortgage career but I have also been an 'Operations Manager' as well as a Loan Officer Assistant. 480-980-8700

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Melanie Summers

Loan Processor

I have been in the mortgage business for over 20 years. I love helping our first time homebuyers and families with the biggest purchase of their lives as well helping our seasoned buyers purchase yet another investment home. I am not an originating team member.

Ready to get started?

Get in touch to discuss your home financing goals and explore next steps together.

Office Hours

Monday - Friday

Saturday

Sunday

8:00AM - 5:00PM

Closed

Closed

Monday - Friday

8:00AM - 5:00PM

Saturday

Closed

Sunday

Closed

NMLS ID #1081954

I am authorized to do business in the states of Arizona, California, Colorado, Nebraska and New Mexico. AZ BK#0018883; AZ BKBR# 1049284; AZ LO Lic.# 0925884; Licensed by the Department of Financial Protection and Innovation under the California Residential Mortgage Lending Act;

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See what we offer

Whether you’re buying your first home, exploring down payment assistance, relocating for military service or purchasing in a high-cost market, Guild offers a range of loan programs designed to meet different needs and situations.

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