Berenice Su (Marquez)

Investment Associate


BRE #01965005

Berenice specializes in multi-family investments in the Echo Park, Westlake and Downtown Los Angeles adjacent markets, representing both buyers and sellers. Her standout work ethic and resolve in meeting client needs have time and again shown Berenice to be a consummate professional committed to the field of real estate. She approaches each transaction with the sole focus of seeing her client’s goals guided through to success from start to finish.

Berenice graduated from the University of Southern California with a BS in Public Policy and an emphasis in Real Estate Development. Prior to joining Concord, Berenice interned for several real estate firms and was heavily involved in business and real estate organizations as a student. During her spare time, she enjoys hiking, cycling, and traveling.

Christopher Aguirre

Investment Associate


BRE #01991859

Chris specializes in multi-family investments and development in the East Hollywood, Hollywood, and Koreatown markets of Los Angeles. Chris has over 5 years of experience in property management and business development and has successfully repositioned over 60 properties and relocated over 200 tenants. Chris studied Sociology and earned a BA from UCLA.

Chris also comes with over 8 years of military experience; he is a decorated veteran of multiple tours during both the Operation Iraqi Freedom and Operation Enduring Freedom campaigns. From his military experience, Chris has embodied three key principles into his professional work; integrity first, service before self, and excellence in all he does. Chris loves to exercise and hike regularly with his two dogs on the weekend.

Sam Atefyekta

Acquisitions Analyst


Edan Avital

Chief Operating Officer


BRE #01971225

Edan Avital attended California State University Channel Islands where he earned a Bachelor’s Degree in Business Management and holds an active California Real Estate License. Edan formerly served as the Chief Operating Officer of Strategic Legacy Investment Group, Inc., a private equity real estate investment firm that also provided real estate services such as property management, real estate brokerage, and construction management. Edan started with the company in 2014 and played a vital role in taking the company from concept to a $170MM business in just over three years. With his knowledge in acquisitions, development, property management, and investor relations, Edan hopes to focus on managing all aspects of operations while working closely with the team to build strong leadership within the organization to continue business growth and lead the team towards high achievements and rewards.

Edan is responsible for overseeing the organizations business growth strategies, marketing, processes and procedures, and day to day operations with a focus on driving long-term growth to further establish Concord in a highly competitive market. On his free time, Edan enjoys hiking, boating, snow skiing, and spending time with friends and family.

Tali Diamond

Residential Associate


BRE #01984834

Tali Diamond specializes in residential sales and high end leases in the Los Angeles area. She comes to Concord after working for years in the fashion industry as a retail executive and even owned her own fashion brand. While fashion was her passion, real estate is in her blood.  Coming from a family of developers Tali has developed a keen eye for a great property.  Most recently Tali has blended her skills and works with individuals and families relocating to the LA area, ensuring that their home search is as smooth and seamless as possible. Like in fashion, Tali realizes that your home is also a reflection of your personal style.  She takes this role seriously in making her clients realize their vision and making it come through fruition.

Tali utilizes every traditional marketing method and incorporates today’s modern technology to assist sellers and buyers alike. She takes pride in holding memorable open houses for sellers that attract many potential buyers, and leaves no stone unturned to find just the right property for her clients.

Tali attended the University of Texas at Austin and lives with her 3 teenage children in West LA.

Elad Edison

Property Manager


Reza Haghshenas

Staff Accountant


Reza is responsible for quality control of the accounting process at the property level for Concord Real Estate Services, reconciling and investigating irregularities and inconsistencies to make sure our clients are receiving the best representation possible. He works directly with Concord’s accounting team and asset managers to ensure that our process is optimized for accurate and timely financial reporting at both quarterly and monthly marks.

Reza is a graduate of the University of Massachusetts with a Bachelor of Science in Financial Accounting. Reza Joined the Concord Real Estate Group in 2015, bringing over 5 years of real estate experience along with a professional focus in property accounting. Reza recently relocated to Los Angeles from the Boston area and he enjoys being active in the sunny California climate. Taking full advantage of our amazing local weather, he enjoys playing recreational sports, hiking, and hanging out on the beach. The cooler season finds him off skiing and traveling abroad.

Kim Hayes

Regional Property Manager - Texas


Tim Heiselmoyer

Property Manager


Tim specializes in the wide range of Management Services we offer at Concord. A career that began as a Resident Manager, Tim’s knowledge of tenant and manager relations is a key asset in the daily operations of Property Management. From the mobile office, he can advertise and show vacant units, maintain property upkeep, settle tenant issues, as well as create and maintain an active line of communication on property occurrences. Prior to Concord Tim spent time in the entertainment industry, becoming a Screen Actors Guild member for his work on the 2008 remake of the feature film “Fame”. A native of Philadelphia, Tim has the blue collar work ethic to assure complete client satisfaction.

Guillermo Ma

Managing Director


BRE #01350503

Rebecca Mendez

Property Manager - Dallas


John Murphy



John 40 + years’ experience spans multiple disciplines and industries including Public Accounting, Manufacturing, Government, Health Care and Property management. He is Certified in Pennsylvania (inactive) and candidate in California as of 2016.

His undergraduate work is from Penn State University and MBA from California Lutheran University.

Prior to joining Concord, John was the Chief Financial Officer at a Beverly Hills Property Management Company.

Brenda Rivera

Assistant Property Manager - Dallas


Miri Robin

Residential Associate


BRE #01912491

Miri Robin was born and raised in Los Angeles and has been a resident of Beverlywood since 2004. She values and appreciates the quality of life there as well as the surrounding communities. It is through this personal experience as a resident, parent, and agent that she can relate to the needs and desires of present and future home owners. Mrs. Robin takes the time to get to know her clients well. This practice of seeking to understand client needs combined with her market knowledge leads to consistently delivering positive results. For Mrs. Robin, it has always been about providing clients with the best possible service while maintaining the highest level of confidentiality and discretion. For her sellers, she utilizes current market information and trends to properly price properties. She partners with sellers to develop a marketing strategy to help them achieve their personal goals. For buyers, matching the perfect home with their wishes, dreams, and desires is critical. Mrs. Robin’s connection with the community enables her to network with perspective sellers and other agents to deliver the largest selection of on-market and off-market properties for her clients.

Reuben Robin

Chief Executive Officer


Reuben Robin, founder and CEO of Concord Ventures has 17 years experience in real estate investment. With multiple real estate companies under his command, Reuben is committed to becoming a national force as a real estate investment brand. Concord Ventures and its multiple subsidiaries are all pieces to successful real estate investment.

For real estate investors  wanting an advisory team that is experienced and has a proven track record, Concord is the premier choice to attain a high rate of return. Focused on real estate investments for more than 17 years, Reuben provides what few others can; a vertically integrated platform that can provide a full suite of investment services. Under Reuben’s guidance, Concord has grown from a one-person operation to a group consisting of more than 60 employees. With more than $1 billion in real estate investment properties closed since 2001, Reuben has proven himself an expert in every facet of the investment process for commercial real estate.

From humble beginnings, Reuben started his career in 2001 at a large national  brokerage firm. In his 5-year tenure he was personally responsible for $250 million in multifamily investment sales. Through his ethics, integrity and aggressive negotiations Reuben earned the National Rookie of the Year Award, five Sales Awards and two unprecedented National Achievement Awards, the company’s highest honor. One of Reuben’s first accolades was making the National Association of Realtors “30 under 30”, a list of top real estate professionals in the U.S. under 30 years old. He has been recognized by the city of Los Angeles on multiple occasions, earned the National Young Leadership Award in the real estate and construction division of the JFED Los Angeles in 2012 and many more industry focused honors since.

Reuben has been a strong community supporter and works with a number of charitable organizations throughout Los Angeles and the U.S. He sits on the boards of four organizations in Los Angeles and has been instrumental in the building of multiple community focused projects. Reuben is an all around solid individual, he works hard, advises young up and coming professionals, employs a staff of over 60 people and manages to balance his career with a strong family life. When not finding new investment opportunities or sitting at the helm of Concord Ventures managing his team, he shares his love of travel with his wife Miri and their five children

Mirriam Robin

Residential Associate


BRE #01933039

Miriam Robin exhibits integrity and hard work in every step of her client’s real estate transactions. Raised in a real estate family, she has the ability to use her knowledge and experience to anticipate and meet the needs and goals of her clients. She has also been known to help clients acquire prize properties before they ever even make it to market.

As president of RnR Design Group, an interior design and furniture company located in Los Angeles, she has the ability to go above and beyond in servicing your specific real estate needs. She has built a solid foundation of residential clients in the greater Los Angeles area through her strong social network and energetic personality, and her unparalleled track record of high ethical standards are the hallmark of her success. Miriam graduated with a bachelor’s degree from Stern College in New York City.

Maria Rojas

Staff Accountant


Maria specializes in accounts payable at Concord, bringing over 10 years of experience in her field. She works directly with Concord’s accounting team and asset managers to ensure that our process is optimized for accurate and timely financial reporting at both quarterly and monthly marks. Maria is very excited to be at Concord along side such a great group, and she takes pride in working for a company that guides their clients in creating value, making their client’s best interest their first priority. She loves the outdoors and enjoys traveling to new destinations.

Shana Rostami

Residential Associate


BRE #01925317

Shana Rostami is a real estate agent in Los Angeles with an extensive knowledge about the Beverlywood neighborhood and the surrounding areas. She has lived in many different parts of California, cultivating her knowledge of residential homes in the Los Angeles area. Her personal experience as a resident, parent, and real estate agent brings together all of her expertise, allowing her to relate to the needs and desires of a neighborhood and those looking to become part of a community.

Shana takes great pride in knowing when she has sold the perfect home to a buyer as her true passion comes from finding the right home for the right person. Shana loves being a mother and spending time with her husband and 3 children. She also loves traveling and learning about new destinations.

Imbar Sagi-Lebowitz

Residential Associate


BRE #02014681

Imbar is a real estate associate specializing in finding residential homes in Beverly Hills and Los Angeles.  Imbar represents both buyers and sellers.  Imbar is also a licensed attorney.  Prior to working at Concord, Imbar practiced labor and employment law.  Imbar holds degrees from University of California Los Angeles and Loyola Law School.

Yaron Samuha

Investment Associate


BRE #02015572

Yoav Sarraf

Director of Brokerage, Managing Partner


BRE #01856362

As Managing Partner and Director of Brokerage at Concord, Yoav leads the firm’s Brokerage Divisions across all asset classes. He regularly contributes his vision, experience, and leadership skills as part of the executive team while playing an active role in the firm’s direction and growth. Yoav believes in building strong, long-term relationships with our clients and employing the utmost dedication and diligence in successfully obtaining their objectives. His extensive background in real estate investments gives him a strong understanding of the needs and concerns of owners, investors and retailers. Yoav shines in his leadership role by helping our agents achieve meaningful results through combining in-depth, local-market knowledge with creative solutions.

Prior to joining Concord in 2008, Yoav had several years of experience in commercial real estate investment, development, and management. He held the position of Director of Acquisitions for Brighton Holdings, a diversified private investment company, where he was responsible for the evaluation and acquisition of investment opportunities. Yoav is a graduate of the University of California, Los Angeles, serves as the Chair of The Jewish Federation’s Real Estate and Construction Young Adult Division and is a member of their Community Leadership Institute. He is also professionally affiliated with the International Council of Shopping Centers, the Urban Land Institute, the Central City Association, and several other professional organizations.

Leslie Sitbon

Residential Associate


BRE #01929178

Leslie Sitbon is a residential associate specializing in the Beverlywood and Beverly Hills. Leslie’s strong relationships with buyers are attributed to her connection to the community and aggressive marketing approach. Prior to moving to Los Angeles in 2009, Leslie worked as a residential real estate agent in Paris, France.

Grecia Velazco

Marketing Administrator - Office of Guillermo Ma


Grecia Velazco specializes in the marketing efforts for Managing Director Guillermo Ma. Grecia helps with the proposal and marketing packages for listings as well as keep up to date records on properties sold in the area and new listings posted every day. Grecia has over five years of experience in marketing and communications and received a degree in public relations from California State University, Sacramento. In her spare time Grecia enjoys exploring the city, hiking and traveling all over the world.

Sara Vita

Director of Operations


As Director of Operations Sara is responsible for the oversight of office operations, procedures, administrative staff, human resources and facilities management. Sara brings over a decade of real estate office experience and dedication to Concord, ensuring everyone from the agents to outside vendors are given the individual attention that sets Concord apart from the competition.

Prior to joining Concord, Sara held management positions in both the brokerage and corporate offices during her more than ten-year career with Marcus & Millichap. Sara is a Los Angeles native, a true valley girl to be exact, born and raised in the San Fernando Valley. Sara enjoys off-road motorcycle riding, martial arts with her two sons and spending as much time as possible enjoying life with her family and friends.

Bita Yaghoobian

Investment Associate


BRE #01981042

Bita specializes in the sale of multi-family and development properties, with a primary focus in the rapidly emerging areas in and around the city of Inglewood and the San Fernando Valley. Bita studied Business Law at Cal State Northridge and received a Law Degree with numerous distinctions from the University of West Los Angeles, where she was included on the Dean’s List.

Bita’s comprehensive knowledge of her market area, its current tenant compositions, target demographics, and her extensive landlord relationships all allow her to tailor innovative and effective occupancy solutions for her clients. Prior to joining Concord, Bita managed hundreds of real estate cases for Bank of America’s litigation office. She also prosecuted numerous cases as a law clerk with the District Attorney’s office.

Jackie Yashar

Senior Vice President Investments


BRE #01332597

Jackie is Senior Vice President of Investments at Concord Real Estate Services with over 12 years of experience in commercial real estate. Previously, Jackie served as Senior VP of the South Park Group, specializing in the greater Los Angeles area. He was focused on land acquisitions for mixed-use projects and income properties in the multi-family, office, and retail sectors. Jackie was also a Director at KW Commercial Brentwood, where he sold properties in the REO market before finally arriving here at Concord.

In addition to his real estate experience, Jackie was an international consultant and trader of high-end Italian fashion and apparel. Whether presenting a clothing line to the most knowledgeable buyers in the world, or as he does today, meeting with the most experienced property investors in Los Angeles, Jackie has the people skills and negotiation tactics to represent even the sharpest of client’s best interests. Jackie is devoted to his wife and family, loves to study Talmud, Kabala, and was involved in the creation of a Sephardi community in Los Angeles.