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                                                                     EXHIBIT 99

                LANDMARK SYSTEMS BOARD AUTHORIZES $3.5 MILLION
                           SHARE REPURCHASE PROGRAM

         RESTON, Va. (December 4, 2000) - Landmark Systems Corporation (NASDAQ
NMS: LDMK) today announced that its Board of Directors has approved a share
repurchase program to buy a portion of its common stock for an amount not to
exceed $3,500,000. Using available cash, Landmark plans to make the purchases
in the open market from time to time, depending on market conditions. The
buyback program, which takes effect immediately, calls for transactions to be
conducted at prevailing prices or in negotiated private transactions at
management's discretion.

About Landmark Systems Corporation

         Headquartered in Reston, Virginia, Landmark is a leading, global
provider of software products and services that help organizations manage
critical information technology systems and e-business operations. Landmark
offers The Monitor(R) (TMON(TM)), a family of products and services that
ensure operating systems, applications, databases, middleware, and servers
operate as efficiently and effectively as possible. Used by over 4,000
companies in 40 countries, Landmark solutions ensure optimum systems
performance by monitoring current system availability, diagnosing and
preventing problems, as well as planning for future enterprise application
capacity needs. For more information on Landmark and its products and
services, visit the company's Web site at www.landmark.com.

         Some of the statements in this news release are forward looking and
relate to anticipated future operating results. Future operating results may
be impeded by single or combined events and/or circumstances that have not
been presently anticipated. Forward-looking statements are based on Landmark
management's current expectations and assumptions, which may be affected by a
number of factors, including, without limitation, the significant percentage
of sales consummated in the last few days of each calendar quarter making
financial predictions difficult and raising a substantial risk of variance in
actual results, the risks associated with changes in the Company's business
strategy and focus, continued softness in the mainframe enterprise software
market, competitive product introductions resulting from rapid technological
advances, price competition, any failure or delay in the Company's ability to
develop and introduce new

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products, uncertainty of customer acceptance of new products, seasonal factors
affecting the Company's sales, the Company's ability to attract and retain
qualified technical, sales, managerial and other key personnel, the Company's
ability to manage expenses effectively, foreign currency risk, and other
factors. Therefore, there can be no assurance that actual future results will
not differ


LANDMARK ANNOUNCES SHARE REPURCHASE PROGRAM - PAGE TWO

materially from anticipated results. Readers should refer to Landmark's
disclosure documents filed with the Securities and Exchange Commission for
specific details on some of the factors that may affect operating results.

Landmark Systems Corporation, PerformanceWorks, and The Monitor (TMON) are
registered trademarks of Landmark and its subsidiaries. All other products and
brand names mentioned are trademarks or registered trademarks of their
respective companies.

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