Exhibit 99.1 Michael Cummings To: Mr. Michael Novielli March 7, 2005 Chairman Board of Directors Network Installation Corp. Dear Mr. Novielli, I hereby tender my resignation as Chief Executive Officer of Network Installation Corp. effective March 7, 2005. I take this opportunity to thank the Company and all the members of the Board for giving me an opportunity to serve the Company in various capacities. I wish you all success in the future. If, I can be of any service, please contact me directly. Thank You, /s/ Michael Cummings ______________________ Michael Cummings