0000927016-03-002137 10-Q 2 20030331 20030429 PEGASYSTEMS INC 0001013857 7374 042787865 MA 1231 10-Q 34 001-11859 03667641 101 MAIN ST CAMBRIDGE MA 02142-1590 6173749600 101 MAIN ST CAMBRIDGE MA 02142-1590 10-Q 1 d10q.htm FORM 10-Q EX-99.1 3 dex991.htm CERTIFICATION FOR THE CHIEF EXECUTIVE OFFICER