About
Owners, developers and brokers — on the same blocks for years.
People
Jay M. Soneff, MBA
Founder
Since 1978, Jay Soneff has been serving Denver and surrounding areas with his expertise in commercial real estate brokerage. As the founder, Jay's goal is to help you generate the maximum possible income for your enterprise. Jay was born and raised in Denver, Colorado, and attended John F. Kennedy High School before earning a Division 1 baseball scholarship to The University of Colorado. In four years, he graduated with a Business Degree in Finance and Real Estate and a minor in Economics. At age 22, Jay became the youngest broker in the state by taking advantage of the new real estate commission that allowed a real estate degree to replace the two years of Salesman status requirement for broker licensing. In 1995, Jay went back to school and earned his Master's degree in Construction Finance and Management from the University of Denver. With his extensive experience as a developer, agent, and investor in multiple real estate platforms, Jay has dealt with a variety of commercial development, investment, leasing, and management situations. Jay's experience in sales and acquisitions, land development, construction, construction management, and complex joint venture agreements have given him a well-rounded perspective in all aspects of the real estate business. He has survived several market swings from the late 70's boom to the late 80's crash, and he knows that the market will ultimately separate conservative and stable projects from speculative and over-leveraged properties. This experience has helped him serve all his clients by protecting and maintaining their properties for long-term success. Jay is married to his elementary school sweetheart, Jan, and they have two children, Jay Jr. and Jaclyn. In his free time, Jay enjoys his hobby as an avid vintage car enthusiast.
Marsha Laurienti
Property Management Division Director / Broker / Executive Assistant
With Jamis Companies since 2004
Marsha was born in Denver, CO and has spent her life in the area. Marsha started out working in the banking industry before moving over to the mortgage industry. When she was first hired by Jay Soneff, she headed the Mortgage and Finance Division. She specialized in Commercial Lending and fulfilling long term goals of the Jamis Companies’ clientele. During this time, Marsha assisted Jay in his real estate and development division. Before the housing crisis of 2008, Jay and Marsha made a joint decision that the Mortgage and Finance Sector was far too unsettled to offer great service to their clients, closing down that section of the business. During Marsha’s time with Jamis Companies, she has tackled many different positions to assist Jay in his businesses. From taking over and increasing the bottom line of the Property Management division by 30% to being the operations manager of 2 bars, to being the bookkeeper for 5 companies to operations manager for Jay’s restaurant, Marsha has done a little bit of everything. Through everything she has attempted, what she loves most, is the relationships she has built with her employees, tenants, landlords, and clientele. In 2014, after 10 years in the real estate industry, Marsha took the real estate test and became an associate broker to better serve Jamis Companies’ needs to grow. Currently, Marsha heads the Property Management Division and assists Jamis Companies’ agents, employees and clients. Marsha has expertise in understanding the long term goals of a client, and helping the client achieve those goals. Marsha has established strong relationships with her clientele by excellent customer service and her knowledge of the Real Estate field. Marsha is an avid Broncos fan and a single mother of 4 now young adults.
Dooley Batnasan
Broker Associate
With Jamis Companies since 2021
Dooley graduated from CU Boulder with an emphasis on real estate & finance. He was picked up by Jamis in 2021 & since then has completed over 20 million dollars' worth of real estate transactions. He works within the tight nit Asian community working both the list & buy side. He has done a wide range of deals from residential, commercial, lease, hospitality, & business opportunity deals. He enjoys negotiating strong deals for his clients & loves to help others fulfill their real estate dreams. Dooley is a real estate investor in the hospitality and restaurant space. He has access to great lenders, construction vendors, and his expertise in running small business himself allows him to cater to exactly what his client's needs are. Dooley enjoys networking, socializing with friends and family on his free time. He was a former wrestler and is now an avid wrestling fan.
Isaiah Mayfield
Broker Associate
With Jamis Companies since 2025
Isaiah Mayfield is a seasoned sales professional with over seven years of experience spanning commercial real estate and technology. Known for his ability to build genuine relationships and deliver results, Isaiah combines strategic thinking with a people-first approach to every opportunity. Originally from Texas, Isaiah relocated to Colorado in 2018, where he has continued to grow both personally and professionally. Outside of work, he’s passionate about sports, outdoor adventures, and making the most of Colorado’s natural beauty. Isaiah values authenticity, communication, and connection. Whether you're exploring a potential partnership, looking for insight into sales strategy, or simply want to connect, he welcomes the conversation.
What clients say
“Jay Soneff and his team are aces to work with. I rented a space from him in Olde Town Arvada for over 21 years for my real estate company. Without question, he was the best landlord I've ever had. He was responsive on the few occasions I had a problem. Our furnace went out twice in those years and it was repaired within hours, so we could continue working. Jay and I have worked together on real estate transactions and I have always found him to be fair, honest, sincere and righteous. You can't go wrong with Jay and his team!”
April CarltonThe Carlton Company “Jamis Companies have managed several of our commercial properties in Denver for the last 10 years. During this time, the property management team has consistently shown a high level of integrity, professionalism and competence. Our working relationship with Jay, Marsha and the rest of the Jamis Team has always been positive, and we highly recommend them.”
Scott McDougalPresident - McDougal & Co. “I rented a commercial space from Jamis Property Management for 20 years. They were very easy to work with and responsive to my needs. I felt they treated me fairly and strived to maintain consistent pricing without any surprising increases. They are experienced and reliable.”
Karin DukehartHart's Dancewear
Community involvement
Jay Soneff helped form the Ballpark General Improvement District (GID) and serves on its Board of Directors. He also serves on the Board of Directors of the Ballpark Registered Neighborhood Organization, a registered 501(c)(3). Learn more at ballparkdenver.org and ballparkcollective.com.