Global Defense Technology & Systems, which provides IT systems and solutions to national security agencies, filed on Thursday with the SEC to raise up to $75 million in an initial public offering. The McLean, VA-based company, which was founded in 1969 and booked $199 million in sales over the last 12 months, plans to list on the NASDAQ under the symbol GTEC. Cowen & Company are the lead underwriters on the deal. No pricing terms were disclosed.