EXHIBIT 99.1

                  PREDICTIVE SYSTEMS NAMES ANDREW B. ZIMMERMAN
                             CHIEF EXECUTIVE OFFICER


New York, NY - June 25, 2001 - Predictive Systems, Inc. (Nasdaq: PRDS), a
leading network infrastructure and security consulting firm, today announced it
has named Andrew B. Zimmerman as its chief executive officer. Mr. Zimmerman
spent 20 years at PricewaterhouseCoopers (PwC), most recently as Global Leader
of its E-Business consulting practice. Before joining Predictive Systems, Mr.
Zimmerman was chief operating officer at idealab! New York, a leading creator
and operator of technology businesses. Mr. Zimmerman will also join Predictive
Systems' Board of Directors.

"With more than 20 years of management experience in the consulting and
technology fields, Andy Zimmerman brings a wealth of expertise to Predictive
Systems," said William Wyman, chairman of the board and interim CEO. "His
business savvy, strategic perspective, long relationships with major clients of
Predictive Systems, and charismatic leadership all make him an excellent choice
for our company."

"I'm very excited to be joining the company," said Andrew Zimmerman, CEO of
Predictive Systems. "As a pure play provider of sophisticated network
infrastructure, security consulting and managed services, Predictive Systems is
well positioned to meet client demand through both direct and indirect sales
channels. With a solid track record of providing tangible business benefits and
measurable results, our team of experienced consultants sets us apart in our
market."

Before joining idealab!, in February of 2000, Mr. Zimmerman, 46, led several
global practices at PricewaterhouseCoopers. During his tenure as Global Leader
for PwC's E-business consulting practice, where he was responsible for
marketing, alliances, venture investments, technology monitoring, thought
leadership, and training, the firm's e-business revenues grew from $300 million
to $1.7 billion. He also served as a member of PwC's global executive committee
for the consulting practice. In earlier positions with the firm, Mr. Zimmerman
served as the global leader of the telecommunications industry practice,
overseeing consulting, accounting, tax and computer security services to telecom
providers. In recognition of his leadership, Consulting magazine named Mr.
Zimmerman as one of seven "Up and Coming" leaders in the management consulting
industry in 2000.

Mr. Zimmerman has been an innovator in technology and computer networks for more
than a decade. In 1986, he co-founded Reach Networks; an early Internet company
that pioneered the use of UNIX and IP networking protocols. This technology,
which was initially implemented at Coopers & Lybrand, grew to 30,000 users and
was hailed in an article by Tom Peters, which he called "one of the most
important stories we have ever run." Reach Networks was also featured at PC
Forum and in articles in CIO, Information Week and PC Week magazines. More
recently, Mr. Zimmerman created PricewaterhouseCoopers' Telecom Insider
extranet; a free Internet-based news and information service broadcast to over
70,000 leading telecom executives across the globe. The service was featured as
a best practice in Sales & Marketing magazine.



A graduate of Haverford College, Mr. Zimmerman received a Master's degree in
Accounting from New York University and is a certified public accountant in New
York State.

About Predictive Systems
Predictive Systems, Inc. (Nasdaq: PRDS) is a leading network infrastructure and
security consulting firm focused on building fast, reliable, secure networks for
service providers and global enterprises. The firm's BusinessFirst(TM) approach
maps technology solutions to business goals, and delivers measurable results.
Predictive Systems' clients include Allstate (NYSE: ALL), Bear Stearns (NYSE:
BSC), BellSouth (NYSE:BLS), British Telecom (NYSE:BTY), Cisco Systems
(Nasdaq:CSCO), Citigroup (NYSE:C), Credit Suisse First Boston (NYSE:DIR), First
Union National Bank (NYSE:FTU), WorldCom (Nasdaq:WCOM), and Pfizer (NYSE:PFE).
Headquartered in New York City, Predictive Systems has regional offices
throughout the United States. Internationally, it has offices in Germany, Japan,
the Netherlands, and the UK. For additional information, please contact
Predictive Systems at 1-800-770-4958 or visit www.predictive.com.

Predictive Systems, the Predictive Systems logo, BusinessFirst, and Global
Integrity are trademarks or registered trademarks of Predictive Systems, Inc.
All other brands or product names are trademarks or registered trademarks of
their respective companies.

This press release contains statements of a forward-looking nature relating to
future events or future financial results of Predictive Systems. Investors are
cautioned that such statements are only predictions and that actual events or
results may differ materially. In evaluating such statements, investors should
specifically consider various factors that could cause actual events or results
to differ materially from those indicated from such forward-looking statements,
including the matters set forth in Predictive Systems' reports and other
documents filed from time to time with the Securities and Exchange Commission.