We guarantee top-tier professional results and leave every job site better than when we arrived.

From cleaning to restoration, we do it all

See what are clients think

SDI has been providing kitchen hood exhaust system cleaning and maintenance services and specialized maintenance and restoration services to the commercial and industrial community for over 25 years. In that time, we have provided our quality service to such clients as Ralph’s, Food-4-Less, Albertson’s, Vons, Stater Bros., Gelson’s, Pep Boys, Penske and many others.  With this experience, we have established a proven system of service that has greatly enhanced our customers’ building maintenance programs, while simultaneously helping them maintain a cost-effective bottom line.

“Based on our experience, I have no hesitation recommending them to any company that will need their service. It has been a pleasure doing business with Shannon Diversified and we look forward to continuing our relationship with this company.”

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Hovik H Kepenyan

Manager of Facilities, Universal Studios Hollywood

Shannon Diversified, Inc. has always been a very professional and reliable company to work with and I have no hesitation recommending them to any and all organizations who are in need of their services.

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Bob Gonzalez

Facility Engineering Manager, Albertsons / SuperValu

SDI has been professional, diligent, conscientious and a good partner with Patina. I would highly recommend.

David Ruede

VP Design, Construction & Maintenance, Patina Restaurant Group


Services you're interested in:




  • Riverside Unified School District Employee Cafeteria
  • Hawthorne Unified School District School Cafeterias
  • L.A. County Sheriff Headquarters Kitchen
  • Riverside County Jail
  • Arrow Head Regional Medical Center
  • Riverside Community Hospital
  • Chaffey Unified School District
  • USMC Logistics Base, Barstow California


  • Universal Studios Properties
  • L.A. Music Center
  • Disneyland (Patina Properties)
  • Orange County Performing Arts Center
  • L.A. County Museum
  • Cypress Gardens Retirement Center
  • Marriott Courtyard/Fullerton
  • Geico Corp.
  • Greenleaf Masonic Home
  • Toyota Corp. Employee Cafeteria
  • Oxy West
  • Quakes Baseball Stadium
  • Long Beach Brethren Manor
  • Hollywood Bowl
  • California Culinary School
  • Aerospace Corp.
  • Riverside Culinary School
  • Hotel Solara/J-Six Restaurant
  • St. John’s Employee Cafeteria
  • Sur La table
  • Saboba Casino
  • L.A. Child’s Court