A Brown University degree in Business and Photography anchors Christopher Sheehan's boutique practice at One Mission Realty, 928 Fort Stockton Drive in Mission Hills 92103, backed by California DRE license 01902256 since 2010. That Business-and-Photography combination, unusual in the Realtor field, means listing imagery for Sheehan's Mission Hills, Hillcrest, North Park, and Kensington properties is shot in-house rather than outsourced, a workflow that shares aesthetic DNA with longtime San Diego shooter Don Mirra Photography. A five-year run in home staging and interior design before licensure, starting in 2005, gives Sheehan a pre-listing pricing advantage: properties enter the market already styled for the demographic most likely to submit the winning offer. One Mission Realty operates as a non-franchise independent brokerage, which means split fees go into local marketing and community sponsorships rather than national royalty payments. Buyer representation reaches into La Mesa, La Jolla, Carlsbad, and Del Mar, and canyon-rim listings with structural complexity get walked by Mission Hills architects Safdie Rabines Architects before buyers move to offer. The most complex engagements involve historic Mission Hills canyon properties where slope stability analysis, view-preservation easements, and coastal-zone-adjacent permitting all have to be coordinated before a clean-title escrow can close.