Trystate Mechanical, Inc. Trystate Mechanical, Inc. Search | Advanced Search | New Members | Coupons and Discounts | All Categories Other >> MCA Trystate Mechanical, Inc. 241-02 Northern Blvd.Douglaston, NY 11362 | View on Google Maps Michael O'Brien (718) 819-8844 | fax: (718) 819-8433 Visit Site