Knowledge Consulting Group, a Sterling, Va., professional information technology services firm, appointed two new executives to its management team. Tom Sanders was named the company's new vice president of business development and Dirk Hamilton is vice president of technology. Sanders joins KCG with more than 25 years of experience within the public-sector IT market at PlanetGov.com, Federal Sources, DynCorp, Ogden/ERC (now Anteon), and Informix. Hamilton brings over 12 years of expertise in systems integration, network management and project leadership from Sun Enterprise Servers, EMC, Veritas Cluster Server and Oracle DB.

Northrop Grumman Corp.'s Information Technology sector in Herndon, Va., appointed Jim O'Neill as president of its TASC business unit. With more than 15 years of senior management experience, O'Neill was most recently with Oracle Corp. in Reston, Va.

Allen J. Tiedman was named president and chief operating officer of Caelum Research Corp., a Rockville, Md., professional services firm providing scientific, information technology, records management, and other support services to government and private industry clients. Tiedman will direct the day-to-day operations and provide the overall leadership for Caelum, while founder and chief executive officer, Michael Yeh, will focus on the strategic direction and technology development of Caelum's spin-off company, Deus Technologies LLC. Tiedman joins Caelum from his position as president and chief operating officer of Cambridge Systems Inc.

Input, a Chantilly, Va., sales and marketing resource for technology vendors, named Scott Lewis as vice president of sales for its Public Sector and Electronic Business activities. In this new role, Lewis will be responsible for organizing and growing Input's sales activities across its fastest growing business segments. Lewis was previously with PostNewsweek Tech Media as group publisher of Washington Technology and Government Computer News.

John G. Lowe has joined Alexandria, Va.-based Vanderweil Engineers as executive director of client relations. He will oversee Vanderweil's business development in systems design for public-sector buildings. He has more than 15 years of experience with capital projects at municipal, state and federal levels.

Carol Hutchins, head librarian of the Courant Institute of Mathematical Sciences Library at New York University in New York, has been appointed editor-in-chief of Computing Reviews, an online resource for reviews of the best in computing literature.

Denver-based Qwest Communications International Inc. announced that Joseph P. Nacchio, Qwest chairman and CEO, has taken over the role of chairman of President George W. Bush's National Security Telecommunications Advisory Committee. The committee appointment does not affect Nacchio's leadership role at Qwest. NSTAC is a group of 30 telecommunications and technology industry CEOs that advises the president and other key government leaders. Several times a year the group provides industry-based analysis and recommendations on a wide range of policy and technical issues related to telecommunications, information assurance, infrastructure protection and other national security and emergency preparedness concerns.

WorldSpace Corp., a Washington-based provider of direct satellite delivery of digital audio and multimedia services to emerging markets of the world, named Andy Ras-Work to the position of chief operating officer. He will be responsible for all functions that support the company's frontline regional operations. Ras-Work comes to WorldSpace after serving as president and CEO of Semantix Inc.

TippingPoint Technologies Inc., an Austin, Texas, developer of high-speed unified network-defense appliances that deliver threat assessment, detection and prevention for enterprises, government agencies and service providers, elected Sandra England to its board of directors. England is currently the executive vice president of business development and strategic research for Network Associates Inc.

Laurel, Md.-based Aquilent, a developer of Web-based public-sector solutions including portals, e-procurement solutions and scientific applications, hired Peter DiGiammarino as president. He has oversight responsibility for all day-to-day functions of the organization, including marketing and business development, finance, legal, information technology, human resources, and service delivery. DiGiammarino previously served as founder and chief executive officer of IntelliVen.

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