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Sierra Pacific Mortgage Company Inc. NMLS #1788 Toll Free 800-447-3386
Alfonso Casillas

Alfonso Casillas

Loan Officer
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About Alfonso

Integrity is the cornerstone of my business. I believe a mortgage should be about building relationships, and helping my customers achieve their home financing goals, its not just a transaction.

As your confident mortgage professional, I take a consultative approach to the home loan process by customizing each home financing solution to my customer. Its important to me to tailor the mortgage to their unique financial needs.

Whether you are purchasing your dream home, refinancing your current residence or investing in additional property, I can help you find the right loan program for you. Contact me today.

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Additional Languages Spoken
Se Habla Espaol

9851 Irvine Center Drive, Suite 100
9851 Irvine Center Drive,
Suite 100,
Irvine, CA 92618


Alfonso is the best!!! He is caring, honest, and thorough. We have used him twice to refinance our home. He will tell you the truth if it is in your best interest to refinance. He is not just out there to make a buck. He cares! If you have a question or concern, all you have to do is contact him and he gets back to you right away. We would recommend him 100%.

Patti & Peter S.

I heard an advertisement for Sierra Pacific Mortgage on the radio. I like to work with companies that have been recommended rather than off the radio, but I gave them a call anyway.
Al Casillas called me back right away, and he was very knowledgable and polite. I decided to move forward with them even though we were in different states.
I would not hesitate to recommend Al and his team to anyone looking for a mortgage broker. They are professional, knowledgable and easy to work with. They kept me informed of every step along the process and made the process very easy--which is always good!
Thanks Al and your team for making this "painless" and getting us an unbelievable rate! I would work with you again if I ever needed a mortgage broker.

Tim O.

Just wanted to say thanks for helping Tammy and me get re-financed. We are thrilled to have achieved our goal, made possible by you and Sierra Pacific--so glad I heard about your outfit on The Hugh Hewitt radio show for so many years and finally got in touch!
You were very responsive and attentive and you made the process much easier than I have experienced in the past, with other companies. We will certainly recommend you whenever possible.

Dalton M. & Tammy G.

You and Sierra Pacific made the process quite simple and the speed with which we were able to get these done was greatly appreciated.  Your level of communication and customer service was above anything we anticipated and we are forever grateful for everything you did.

Jason and Malisa E.

Thank You Al for the clear directions and expert help while inquiring about a refinance option. We had experienced less than satisfactory help with a prior company and so appreciated your prompt and considerate help. I would be pleased to recommend you and Sierra Pacific to all my friends. Being acquainted with the Hugh Hewitt recommendation was a blessing for us. Thank You again for making the process seamless.

Richard and Nancy E.

I cannot express adequately how impressed I am with the quality of service I received from Alfonso Casillas (AL) from Sierra Pacific Mortgage. Al called back the same day and listened to my concerns with our current situation. He gave me multiple options from a 30-year refinance to a 20-year and even a 15! Al was always available when I had a question and explained in detail what documents I needed to provide. The process was so simple. I cannot thank Al enough for helping me and my family secure this refinance in a short time period.

Scott P.

We would just like to express our gratitude to Alfonso Casillas Jr. and Sierra Pacific Mortgage for the very professional service in helping us to refinance our house! The whole process was very quick and efficient. We really appreciated how Alfonso handled our specific situation with care and was able to work with us for the best outcome for our needs. We will definitely be referring Alfonso Casillas Jr. and Sierra Pacific Mortgage to all our friends and family for their future mortgage needs! 

Todd & Jeanette W.

Alfonso Casinos helped me out, told me the truth, and was good on his word, and did what he told me he was going to do. I was about to get a bad experience with another lender I talked to him and got way better deal then the other loan lender, made this 1st time home buying experience happy and easy.

Cruz R.

It was a pleasure working with Al Casillas. He is a true professional in his ability to communicate with all parties to the transaction. Today’s lending environment, which attempts to make up for “the sins of the past”, can create frustrating conditions and he handled them calmly and efficiently. I would recommend his services to anyone.

Michael F.

I have to say, this was a painless re-fi through the whole process! Those in past seem to have drawn out for months- with nothing going forward!

Al is on top of his game! Questions were answered quick and professionally, as well as all the paperwork on time as quoted and very descriptive. Very thoughtful and professional agent to deal with! I give this man a definite 2 thumbs up, five stars and then some!

Pleasure to do business with you Al !!!

Bryan W.

I want to thank you very much for helping me with my mortgage. It was a pleasure to work with you and your team. The process was seamless. I appreciate the time you took to answer all of my questions and to explore all of my options. Most importantly, I appreciate you giving me all of the information in language that I understood. Rest assured that I will be approaching you again as my financial needs change.
All the best,

JoAnn H.

Alfonso was very proactive and forth coming with information. He answered questions before we even had them. Along with a detailed email/phone calls about where we were in the process. Alfonso is very knowledgeable and we will use him again in the future if we have any additional needs. 

Jose F.

Alfonso was a pleasure to have as my loan officer for the second time. He offered excellent advice, answered every question and helped me make informed decisions. First, he helped me to refinance my 30 year loan to a 15 year loan at the lowest interest rate > 3% two years ago and now he assisted me with a new loan to purchase my new home. We thank you for the time and effort you spent with us making the closing process experience very easy. He deserved the highest praise as he is great and responsive. I will definitely continue to referring to my family and friends to Alfonso.

Juan G.

Al has helped me with three refinance loans, a conventional one and two VA loans. Al has earned my business by ALWAYS going above & beyond with his customer service. He is passionate, extremely knowledgeable, honest and very reliable. Al treats you like family not just a customer. He always looks for which product works best for you and is great at explaining everything in a manner that anyone will understand. In 25 years of home ownership, there has never been another loan officer that has gained my total confidence and as such he is my go-to guy.

Louie S.
Licensing Information :
Sierra Pacific Mortgage Services, Inc., Licensed in Arizona under License No. 0905006. Licensed in California by the Department of Financial Protection & Innovation under the Residential Mortgage Lending Act 417-0015. Regulated in Colorado by the Division of Real Estate 1788 and Supervised Lender License 988320. Licensed in New Mexico 01592. Licensed in Oregon under License # ML-460. Licensed in Pennsylvania 25396. Licensed in Texas 1788. Not Licensed in the State of New York.