Daniel Neal Named Head of USinternetworking's AppHost Business Unit.

ANNAPOLIS, Md.--(BUSINESS WIRE)--Sept. 22, 1999--

Unit Enables Independent Software Vendors to Leverage

USi's Global Network and Sales/Marketing Support to

Provide Applications to Subscribers

USinternetworking, Inc. (Nasdaq:USIX), the leading Application Service Provider (ASP), today announced Daniel Neal as Vice President of Application Hosting and head of USi's AppHost(SM) Business Unit. Through AppHost, Independent Software Vendors (ISVs) host their applications with USi, so that their potential customers have the option to use their software on a subscription basis without having to build the technological and operational infrastructure they would otherwise need to host it themselves. In addition to ASP-grade infrastructure, USi's AppHost Business Unit offers customized client care, pre-sales support and tailored collateral on the ASP model to ISVs.

"AppHost is the first product that enables software vendors to take advantage of the benefits of the ASP model quickly and easily in order to grow their business, and Daniel has been instrumental in launching this new offering," said Christopher R. McCleary, Chairman and Chief Executive Officer of USi. "Daniel and his team have developed a solution that gives ISVs the full advantage of our global network and enterprise data centers, as well as USi's market-tested assistance in marketing and selling their products."

Before being named to lead the AppHost Business Unit, Neal was Senior Director, E-Commerce Partnering at USi, where he contributed to development of the company's rapidly evolving E-Commerce strategy. In that role he developed and maintained relationships with E-Commerce Solution Partners and managed these relationships on an operational level. While in this role, Neal worked to develop the new AppHost product in response to demand from ISVs.

Neal joined USi in July 1998 as Senior Director, Acquisition Integration. In that position, he designed and executed a comprehensive pre-IPO program to integrate two consulting & systems integration firms acquired in Fall 1998 into all aspects of USi's operations; and managed activities to prepare the acquired entities for USi's IPO.

Prior to joining USi, Neal was Director, National Partnering for Global One Communications, LLC/Sprint Corp., where we oversaw a team that negotiated and implemented major commercial transactions to deliver international value-added network services. Neal also served 11 years in the Public Sector, serving as Senior Staff Member in the Office of the Vice President, National Performance Review and as Director, National Capital Planning Staff for the U.S. General Services Administration, Public Buildings Service.

Neal has an MBA from The Wharton School, University of Pennsylvania; and a BA in Political Science from The University of California, Berkeley.

About USinternetworking Inc.

Headquartered in Annapolis, MD, USinternetworking Inc. (Nasdaq:USIX) is the leading Application Service Provider (ASP) outsourcing business applications over the Internet for a flat monthly fee. USi's iMAP(SM) services allow companies to quickly deploy enterprise applications without the associated cost and burden of owning, managing or supporting the applications or underlying infrastructure. USi has built its own global network of enterprise data centers-a Cisco-Powered Network-to interconnect with major Internet backbone providers through contractual PriorityPeering(SM) relationships that ensure fast and reliable connections. USi's data centers incorporate EMC (NYSE:EMC) Enterprise Storage systems and software to provide nationwide data mirroring and recovery. USi's suite of Internet Managed Application Provider(SM) (iMAP) offerings ensures the fastest implementation possible, allowing customers to focus on their core business. IMAP services include: Financial Management and Human Resources, powered by PeopleSoft and Lawson; Enterprise Relationship Management, powered by Siebel Systems; Electronic Commerce, powered by BroadVision and Microsoft; Business Intelligence, powered by Sagent Technology; Professional Services Automation powered by Niku; and USi Web Site Management. USi also offers its AppHost program, which enables Independent Software Vendors to deliver their applications on an outsourced basis by leveraging USi's unique strengths.

Internet Managed Application Provider, iMAP, AppHost and PriorityPeering are service marks of USinternetworking, Inc. Niku, the Niku logo, iNiku and iNiku.com are trademarks of Niku Corporation in the United States and other countries. All other trademarks are the property of their respective owners. USi strategic partners and providers are publicly traded on Nasdaq under the symbols: BVSN, CSCO, MSFT, PSFT, SEBL, and SGNT.