John K. Doull, President, and CEO of Cornerstone Bank is a man dedicated to fulfilling accomplishments. John has two passions, spending quality time with his wife and working at the bank. He has 35 years of banking experience. He started a dream of becoming a small business owner in the basement of his home and is blessed to be in the position now to help small business owners live their dreams. His consistent professional passion is to solve his customers’ needs. Stop in the Cornerstone Bank and let John Doull find answers for you.

John V. Doull, Executive Vice President, graduated from Texas Christian University with a degree in Business Finance. Married for over 14 years, his personal passion of supporting his five children in their unique life journeys crosses over to his professional life of 19 years in the banking field. He really enjoys the life cycle of helping start-up businesses build from the ground up to become successful endeavors. John loves to build long- lasting work relationships with professionals through a variety of loans and deposits with the bank. Come into Cornerstone Bank and let John help you through your journey.

Michelle Guthrie, Executive Vice President, is passionate about spending time with her family, especially her grandson. Her biggest accomplishment has been raising her children and her favorite vacation was a cruise to Bermuda spent with her entire family to celebrate her parent’s 50th wedding anniversary, although Alaskan Cruises are a close second. She is a pro with fine details from needle pointing to target shooting. Michelle makes relationships a priority and that includes relationships built at work. Cornerstone Bank is her second family. She started in banking at age 15, raised her family and has been at Cornerstone Bank since 2003. She would love to build a relationship with you and find a solution for your banking needs.

Bob Titus, Chief Financial Officer for Cornerstone Bank believes in doing the best job he can do and being the best person he can be. This philosophy extends to the workplace where most of Bob’s clients are his co-workers. Bob helps them solve any issues they have related to operating the bank. He has 30 years of experience in banking. Asked about his biggest accomplishment, Bob says that he tries to focus on the big picture, but to motivate himself, he reflects on his past accomplishments. He looks forward to one day visiting Scotland, Ireland, the Vatican and watching the Olympics in person. For now, when he is not working, you can find him in the kitchen cooking up some wonderful dish, at a local BBQ competition, or working out in his yard.

Ken Smith, Senior Vice President, grew up in Overland Park.  After graduating from Blue Valley High School, he attended Rockhurst University where he played basketball and received a B.S.B.A degree in Finance & Economics.  Ken has been married for 23 years and has two sons and two grandsons.  When he is not working, you’ll find him spending time with his family and friends.  Ken enjoys travel, fine dining or being outdoors golfing, swimming or working in his yard.  He is also passionate about his Masonic memberships in his Lodge and Shrine Temple.  Ken has been in banking for over 20 years where he has built a number of wonderful relationships serving and meeting his clients’ needs in retail, treasury management and commercial lending.

Mark Clemmons, Vice President Treasury Management, has been helping customers in the banking field for 24 years. Mark says not one day has been the same for him. He is passionate about getting to know and working with Cornerstone Bank customers. Mark helps customers set up their office with the technology they need up to their comfort level. When Mark isn’t assisting customers by phone or in the lobby, he enjoys spending time with his wife of over 30 years and their two sons, taking their dog to the dog park or lounging on the sofa watching reruns of 1970 and 80’s TV shows. The next time you stop by Cornerstone Bank, check out Mark’s novelty socks. He has over 200 pairs.

Madison McDonald serves as Vice President of Commercial Loans at Cornerstone Bank, where she leverages over a decade of banking expertise. Her background encompasses a broad range of roles, from deposit and operational functions to her current focus on lending. Holding a Bachelor of Agribusiness from Fort Hays State University, Madison is passionate about forging genuine connections with her clients. She is committed to understanding their unique needs and providing tailored financial solutions that make every customer feel like a part of the Cornerstone Bank family. Driven by a love for tackling challenges, Madison extends her dedication beyond the office as the Co-chair of Running with the Cows and enjoys spending time on her family farm with her husband and three children, sharing their passion for the outdoors and agriculture.

Matt Doull is the Vice President of Commercial Loans and brings over twelve years of experience in the banking industry. He earned a Bachelor of Science in Economics with a minor in Finance from Texas Christian University. Before returning to his hometown of Kansas City, Matt spent seven years building his career in the Dallas/Fort Worth area. Outside the office, he enjoys staying active and spending quality time with family and friends.

Andrew is commercial loan portfolio manager for Cornerstone Bank. He maintains, manages, and oversees the Bank’s commercial loan customers while developing strong relationships and recognizing growth opportunities. He loves to learn about different industries and provide financial solutions that help satisfy a company’s needs. He started with Cornerstone Bank in March 2025 and has over a decade of experience working for community banks. Andrew is a University of Kansas graduate who enjoys sports, reading, traveling, music, and spending time with friends and family.

Mike has been in banking for thirteen years with twelve of those years being in Compliance. He started at Cornerstone Bank in November 2017. He loves researching and solving problems to make sure the bank stays in compliance with all applicable laws. As a dedicated lifelong learner, Mike received his M.B.A. from the University of Kansas in 2016. He also currently holds both the Certified Anti-Money Laundering Specialist (CAMS) and Certified Community Bank Compliance Officer (CCBCO) designations.

In his spare time, you may find Mike metal detecting, camping with his son’s Boy Scout Troop, weight training or fishing with his children. He enjoys being active and exploring the United States with his family; the most recent adventures being a trip to Universal Studios in Florida, and a road trip to visit Silver Dollar City in Branson.

Brenda Amaro, Operations Officer/Cashier, looks forward to using her 32 years of banking experience and knowledge to build relationships with the Cornerstone Banking Team and give our clients a satisfactory customer service experience.  When outside of the bank Brenda enjoys spending time with her family and watching all kinds of sports, especially the Kansas City Chiefs and the Kansas City Royals.

Joining Cornerstone Bank in 2019, Shelly Holle serves as the Assistant Vice President of Human Resources.  Leveraging 30 years of HR experience and a Master’s Degree in Industrial-Organizational Psychology, she serves as a resource for employees and management.  Shelly specializes in group benefits and a wide array of HR initiatives overseeing the entire employee life cycle to cultivate a workforce that contributes to the success of the Bank.  She is dedicated to fostering a positive and impactful work environment for all employees.  Early in her career, Shelly also committed to making a positive impact beyond the workplace, demonstrated by her active support of non-profit organizations in the Kansas City community.  In her free time, Shelly is an avid concertgoer, theater enthusiast, and loyal fan of Kansas City sports, also finding joy in gardening, cooking, traveling, spending time with family and friends, and pursuing her life-long hobby of photography.

Melanie’s role here at Cornerstone Bank is Loan Operations Officer. She manages the Loan Operations team at the bank who process and service our Commercial and Consumer loan portfolios for our Loan Officers. She has been with the bank since April of 2019 and has been working in Lending Operations for the last 20 years. In her spare time, she enjoys spending time with her family, and loves watching and cheering on Husker Volleyball, Kansas City Chiefs Football, and the KC Current Women’s Soccer team.  She enjoys volunteering and coaching students in both the HopeKids and Kairos ministries at her Church.  Melanie’s favorite part about being on the Cornerstone Bank team is the feeling of a small community bank in a big city but where we all feel like family.  Melanie thinks the collaborative environment is what truly stands out with our team as we all have a shared focus on ensuring our customers are taken care of.  She enjoys going the extra mile for her customers and her team while encouraging everyone along the way!

Liz started at Cornerstone Bank in October of 2017.  As the Loan Review Officer, she reviews loan requests, borrower and guarantor financials, and compiles the information into a memo. She runs reports, reviews appraisals, compiles commercial internal appraisals, stress tests the commercial real estate portfolio annually, compiles the monthly CECL and concentration reports, and helps when help is needed.  What Liz loves the most about her job is being able to help the lenders maintain or further the banking relationship with existing customers through reviewing existing loans and verifying the customers’ continuing success. She loves knowing that she is helping a small business grow! In her spare time, she enjoys reading and spending time with her family.

Sabrina Mariño, Administrative Officer, joined the Cornerstone Bank staff in 2018 after obtaining a Bachelor of Liberal Arts and working at the University of Kansas for 32 years. She brought her skill set with her to continue working behind the scenes, ensuring her co-workers have the tools they need to successfully assist customers.

At home, Sabrina spends her time creating lasting memories with her children and her new grandson.  She and her husband love to travel to the Canary Islands to visit their oldest daughter and granddaughters.