Innovation, Collaboration, and Client-Centered Service
100+
Loan products to fit every need.
20
Years of experience

Our mission
“At Cornerstone First Mortgage, we're dedicated to delivering high-quality customer service and providing an extensive range of loan options to find the perfect fit for every client.”
Sean Cahan
CEO of Cornerstone First Mortgage
Culture of Collaboration
Teamwork drives our success. At Cornerstone, we work together so our clients benefit from collective expertise and better outcomes.
People Over Profit
Mortgages are more than numbers. We prioritize understanding each client’s needs to deliver tailored solutions that fit their goals.
Creativity and Innovation
We offer diverse mortgage options to meet challenging scenarios. Creativity drives us to find unique solutions for every client.
Never Stop Being Better
We constantly improve our products and technology, ensuring our clients get the best experience, every time.
Meet Our Team
A team of caring, people-focused professionals
Our team brings not only expertise but also a genuine dedication to each and every client.
NMLS# 338424
Eric Rotner
Originating Branch Manager

NMLS# 982496
Deniz Aksoy
Sr. Loan Officer

NMLS# 1931021
Cody Ramirez
Loan Officer

NMLS# 295989
Peter Gaeckle
Sr. Loan Officer

NMLS# 1404862
Brian Green
Sr. Loan Officer

NMLS #447762
Micah Ascarrunz
Sr. Loan Officer
NMLS 261008
Monica Guiton
Sr. Loan Officer
Val Galvan
Team Processor
“Eric is a very experienced lender with great communication. He’s wonderful to work with always meets timelines or beats them. Working with Eric is a pleasure and I recommend utilizing his services.”
Jeremy Jacobson
“I recently had an opportunity to work with Eric. He is very patient and explains every minute details. It was pleasure to work with him.”
Shailesh Gothi
“Highly recommend you work with Eric. He knows his business inside out. I interviewed a number of mortgage brokers and no one came close to his knowledge, expertise, and follow up. He worked hard to find the best solution for my unique situation. Plus he is a great guy and easy to work with. Give him a call.”
Elaine Ferre
Our Roots in Walnut Creek and the East Bay Community
At My Mortgage Ally, we believe that a mortgage isn’t just a financial transaction—it’s the foundation of your life in the San Francisco Bay Area. Founded on the principles of transparency and advocacy, our team, led by Eric Rotner (NMLS# 338424), brings over two decades of local lending experience to the table. Based in Walnut Creek, we have witnessed the evolution of the Contra Costa and Alameda County real estate markets firsthand. We understand the specific challenges local buyers face, from navigating high-balance loan limits to competing against aggressive all-cash offers in neighborhoods like Saranap, Parkmead, and Tice Valley.
Our presence in the 1501 N. Broadway corridor is a testament to our commitment to the community. We aren’t a faceless online call center; we are your neighbors. This local expertise allows us to provide a level of nuance that national lenders simply cannot match. We know the local appraisers, we understand the regional property tax implications, and we maintain strong relationships with the East Bay’s top real estate agents to ensure your closing is seamless and your offer is prioritized.
The “Ally” Advantage: Why Our Expertise Matters
The name “My Mortgage Ally” was chosen with intent. In a lending environment that often feels transactional and cold, we position ourselves as your strategist and defender. Our team of Senior Loan Officers, including Deniz Aksoy, Peter Gaeckle, and Brian Green, specializes in “outside the box” financing that traditional banks often overlook.
While we offer a full suite of Conventional, FHA, and VA loans, our true expertise lies in solving complex scenarios. Whether you are a tech professional in Silicon Valley looking for an Asset Utilization loan, a self-employed business owner in Walnut Creek needing a Bank Statement or P&L-only mortgage, or a real estate investor utilizing DSCR financing to scale a portfolio, we have the specialized knowledge to bridge the gap.
We operate under the umbrella of Cornerstone First Mortgage, giving us the agility of a local boutique firm backed by the powerhouse resources and competitive rates of a national leader. This hybrid model ensures our clients receive “Top 1% Originator” service—meaning faster turn times, fewer hurdles, and a stress-free path to homeownership. At My Mortgage Ally, your financial goals are our mission, and your future is our priority.
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