Low voltage bids security/data

On going work. Contractor needs help with estimates/submitting bids for labor only. Need assistance with estimating new bids for low voltage contracts. Be able to read plans and fully understand the scope of work. Medium- Large projects in NYC We receive bids from other contractors and would be the sub contractor of these bids. We also need help finding new projects to bid on. The breakdown of the bids would be calculating the labor hours to run cable and install security cameras, alarm devices, access control devices and telecom outlets.