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Expert has been a cannabis cultivator, teacher, and consultant for over 29 years. He began his work with medical cannabis in 1994 while attending U.C Berkeley, and was active in decriminalization efforts in Oakland and Berkeley, as well as organizing efforts for the first state to legalize medical cannabis in California in 1996. In the late 1990s and early 2000s, he worked and volunteered in public health, research and education at the Berkeley Free Clinic, UCSF, LYRIC LGBT youth center, and the Harm Reduction Training Institute. During this time, he also helped found and operate several legal medical cannabis farms in Northern California.

In 2006, Expert helped build the Oaksterdam Nursery, which was the largest cannabis nursery in the state at that time. He managed the daily production of thousands of clones for the statewide medical market. During this time, he also worked in the Oakland-licensed medical cannabis dispensary, SR-71/Coffeeshop Blue Sky. In 2007, he helped develop and teach the first horticulture classes at Oaksterdam University and has been teaching there ever since. As the current Horticulture Department Chair and Lead Horticulture Instructor he has led the development of the entire Horticulture Curriculum and helped teach over 80,000 U.S. and international students about cannabis cultivation, science, regulations, and how to design, license, and operate a compliant cannabis business. During this time, Expert also founded Let It Grow Consulting, and has since worked with dozens of indoor, greenhouse and outdoor clients across the nation.

In 2014, Expert joined the Board of Directors at Sparc, San Francisco’s premiere medical cannabis dispensary. That year, his Nevada company was awarded four NV-state medical cannabis cultivation and manufacturing licenses for two commercial facilities currently operating in Las Vegas.

In 2015, he was a featured presenter at the Native Nations Cannabis Symposium and at the MJ Business Conference and Expo in Las Vegas, the world’s premiere cannabis conference, where he lectured on sustainable cannabis cultivation.

In 2017, Expert joined the Hood Incubator, an accelerator program for people of color trying to enter the cannabis industry. At this time, he also became Sparc’s Cultivation Director, helping to run a commercial indoor facility in San Francisco, and to design, license and launch a multi-acre, outdoor and greenhouse, adult- use, cannabis farm in Sonoma County, CA. Within two years, Expert was able to secure Demeter Biodynamic certification for this farm, the oldest and most prestigious international, sustainable farming certification on the planet. He is also lead consultant for a second, Demeter Biodynamic outdoor, cannabis farm in Sonoma County owned and operated by renowned biodynamic winemaker, Mike Benziger.

In 2018, Expert secured cultivation and manufacturing licenses for a currently operating, commercial cannabis company in Rhode Island. In 2019, Let It Grow Consulting helped their client secure four highly competitive cultivation and manufacturing licenses in Missouri. This company is currently operating in multiple facilities totaling over 100,000 sq. ft. And in 2021, another client successfully won cultivation, manufacturing, distribution, and retail licenses for a 17,000 sq. ft, mixed-light, greenhouse facility in Contra Costa, CA. Expert most recently helped a client win cultivation, manufacturing, and retail licenses in New Jersey and design their 30,000 square foot facility in Atlantic City.

Expert is a contributing author and editor for Ed Rosenthal's Cannabis Grower's Handbook (2021). He has been featured on National Geographic, CNBC, NPR, the Atlantic, Washington Post, High Times, Press Democrat, SF Bay Guardian, and Leafly.

He has worked as an expert witness on several cases, where his work entailed:
- Authoring an expert report for an intellectual property lawsuit regarding claims about proprietary cannabis cultivars, facility design/equipment investments and improvements, operational and quality control procedures, programming, and training.
- Offering a range of expert witness services for a lawsuit regarding claims of cannabis crop loss due to alleged negligence of a security contractor at a commercial cannabis cultivation facility.
- Providing expert opinions and testimony during mediation leading to resolution via settlement.
- Providing a range of expert witness services for a lawsuit regarding claims of cannabis crop loss due to a fire alleged to be started by a dehumidifier at a commercial cannabis cultivation facility.
- Providing deposition testimony and written opinions helping the client win a pre-trial settlement.
- Providing a range of expert witness services for the plaintiff in a lawsuit regarding crop loss due to alleged, faulty construction methods and mechanical system malfunction (air conditioning, heating, and dehumidification systems).