GROUNDSOURCE is a Los Angeles based full-service commercial real estate firm that specializes in representing tenants, landlords and investors. Experience in the L.A. marketplace lets it combine extensive insider knowledge with trusted partnerships to create unparalleled value. A boutique firm, it offers clients prestigious service with an intimate, hands-on approach.

It isn’t just about satisfied clients. It’s about repeat clients. Therefore, Groundsource spends whatever time it takes to close the deal the right way. Good business is about a connection, not a commission, which is why Groundsource is by the client’s side from fact-finding to lease execution to signing of a purchase and sale agreement.


Chris Keller has represented tenants and landlords in Los Angeles for over 20 years, both with Madison Partners and Cushman and Wakefield, an international commercial real estate firm.


Daniela Winter, Groundsource co-founder, has experience with tenant representation and has helped investors acquire various property types.

Daniela brings over 30 years of experience in office administration in legal, interior design, restaurant, branding and non-profit fields.


Isaac Abginesaz, born and raised in Los Angeles, CA, graduated cum laude from the University of Southern California with a B.S. in Business Administration and an emphasis in Real Estate Finance.