ITEM 5.02. DEPARTURE OF DIRECTORS OR PRINCIPAL OFFICERS; ELECTION OF DIRECTORS; APPOINTMENT OF PRINCIPAL OFFICERS David Braun, the Controller and Principal Accounting Officer of Vertical Computer Systems, Inc., a Delaware corporation (the "Company"), has resigned for personal reasons (the "Resignation"). The effective date of the Resignation was 6:00 pm local time on April 14, 2006. Mr. Braun did not resign as a result of any disagreement with the Company on any matter relating to the Company's operations, policies or practices, and Mr. Braun did not furnish a letter to the Company with respect to any such disagreement. ITEM 9.01 FINANCIAL STATEMENTS AND EXHIBITS (a) Not applicable. (b) Not applicable. (c) Exhibits - None. 2 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this Current Report on Form 8-K to be signed on its behalf by the undersigned hereunto duly authorized. Date: April 18, 2006 VERTICAL COMPUTER SYSTEMS, INC. By: /s/ Richard Wade ------------------------------------- Name: Richard Wade Title: President and Chief Executive Officer 3