JUNIPER NETWORKS MAKES KEY APPOINTMENTS TO OPERATIONS TEAM

Names Bask Iyer Chief Information Officer and Martin J. Garvin Senior Vice President of
Manufacturing Operations

DUBAI, UAE, July 14, 2011 – Juniper Networks (NYSE: JNPR) today announced two key
appointments to its operations team. Bask Iyer has been appointed as senior vice president and
chief information officer (CIO) and Martin J. Garvin has been appointed senior vice president of
manufacturing operations. Iyer joins Juniper Networks from Honeywell, where he most recently
served as company-wide CIO and a member of the leadership team driving its IT vision, strategy
and operating plan. Garvin most recently served as senior vice president and chief procurement
officer at Dell, where he was responsible for the strategic leadership and operation of Dell’s
global supply chain.

“I am delighted to welcome such strong additions to the Juniper team,” said Mike Rose,
executive vice president of service, support and operations at Juniper Networks. “Bask is a
seasoned leader with deep knowledge and experience in diverse industries, which will benefit
Juniper as we continue to execute our vision for the new network and extend our business into
new market segments. Marty’s wealth of procurement, operations and supply chain management
experience will play a vital role in the company’s continued growth and success.”

Iyer will be responsible for protecting all of Juniper Networks’ critical information, intellectual
property and physical resources, as well as implementing a strategic plan that ensures all
information technology systems are aligned to support the company's multi-year growth agenda
and operational objectives. Garvin will be responsible for driving the company’s manufacturing
and supply chain strategy, and continuing to advance processes, systems and tools to ensure
predictable scalable delivery of quality products to Juniper customers worldwide. Iyer and
Garvin will both report directly to Rose.

Iyer held a variety of roles during his 11 year tenure at Honeywell. He led the transformation
program for all global functions, including information technology, finance, human resources,
real estate and procurement. Iyer’s other roles included CIO for Honeywell Transportation
Systems and general manager for Asia Pacific. Prior to that, Iyer was with GlaxoSmithKline
Beecham for five years as CIO for Consumer Healthcare R&D. He has also held senior
positions at Johnson & Johnson and CTS Corporation. Iyer holds a master’s degree in computer
science from the Florida Institute of Technology and a bachelor’s degree in mechanical
engineering from Annamalai University in India.

Garvin brings nearly 30 years of procurement, operations and supply chain management
experience to Juniper Networks. Recently, he spent 11 years at Dell, first as vice president of
global procurement and then as senior vice president and chief procurement officer. Garvin also
managed all outsourced manufacturing through ODM and EMS providers and was accountable
for cost, quality, capacity planning and fulfillment. Before Dell, he held leadership positions at
NetEdge Systems, Logitech, Sun Microsystems and Hewlett-Packard. Garvin earned an MBA
and a bachelor’s degree in biological sciences from San Jose State University.

About Juniper Networks
Juniper Networks is in the business of network innovation. From devices to data centers, from
consumers to cloud providers, Juniper Networks delivers the software, silicon and systems that
transform the experience and economics of networking. Additional information can be found at
Juniper Networks (www.juniper.net).