If you have a big tree, we recommend the big 3 that we utilize over at Fire Safe Council.
They are fully licensed and insured:
Pacific Slope (951) 659-2596. Josh Whitney c(951) 537-9445.
Pearson 659-3676. Jeremy McGrath c760-984-9445.
Pino 659-4100.

Smaller local outfits. No guaranty on licensing or insurance:
Acumen – Omar SA 951-514-1422 (Lic#1020374).
D&H Fire Abatement (Lic#938982).
Yardbirds 951-867-2938.
TJ Titus 951-816-0813.
Jerry Mitchell 951-282-1257.
GSOB spraying: A Better Tree Co – John H 951-288-5473.