seeking tree trimmer/arborist

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I am seeking suggestions for a tree trimmer/arborist. Last night`s storm brought down one limb from the large tree in our back yard and many others in the future are at risk. The tree itself is in our back yard and alley-accessible, but will require a cherry picker (that can navigate a Bloomingdale alley) to get to the necessary limbs. Anyone with recommendations should please email me at cj2001@gmail.com.