Can one shorten a 30 year old 60 foot tall tall Cypress tree by about a third of its height or will this kill the tree?

Shortening a 30-year-old 60-foot tall cypress tree by a third is a significant reduction and can stress the tree, potentially leading to health issues or death. While cypress trees can tolerate some pruning, it's crucial to follow proper techniques and timing to minimize damage. Consulting a certified arborist before making such drastic cuts is highly recommended to ensure the tree's health and longevity.