David Marcus, the former CEO and founder of mobile payments startup Zong, is the new president of PayPal, a post vacated when Scott Thompson became CEO of Yahoo. Marcus joined PayPal as vice president of mobile last year when it acquired Zong for $240 million. People MovesAmerican Express has lured Neal Sample away from eBay as the company focuses on technology to compete with PayPal. Sample will be senior vice president of technologies for its digital payments initiative called Serve. At eBay, Sample was the chief technology officer of open source commerce platform X.commerce. Hewlett-Packard has confirmed that Sam Greenblatt, chief technology officer for the webOS unit will take an as-yet undetermined new role within the company. The move only adds to HP the drama after the announcement that webOS would go open source. The rest of the hardware team reportedly has been dismantled. Along with the retirement of former Research in Motion co-CEO Jim Balsillie from the company’s board, software CTO David Yach and Jim Rowan, chief operating officer for global operations, also are leaving the company. The BlackBerry maker reported dismal numbers for the first quarter. The Globe and Mail reports that other senior vice-president and vice-president level staff were let go. The exodus from Yahoo continues after Yahoo Labs head Prabhakar Raghavan went to Google. All Things Digital reports Andrei Broder, vice president of computational advertising and chief scientist of the Advertising Product Group, and Jianchang (J.C.) Mao, VP and head of advertising sciences, are also leaving. Yahoo announced 2,000 job cuts this week. Neil Roseman, Zynga's vice president of engineering, has left the company after the launch of its social games platform that allows games to be played at Zynga.com, rather than on Facebook. Roseman also managed and hired for the Seattle office and these duties are now conducted by Jim Veevaert. In the past year, Zynga acquired Seattle-area companies Gasworks Games and CupidsPlay primarily for the talent. Gasworks Games co-founders Toby Gladwell and Andrew Kaplan have joined Zynga, as have CupidsPlay founders Diwakar Gupta and C.J. Huang. Following the departure of Eric Demers, AMD’s CTO of graphics, Godfrey Cheng, who recently served as one of AMD's director of client technologies, also has left the company. Cheng's profile has not been updated. Meanwhile, The Wall Street Journal reports that in staffing up its Austin, Texas, research and development center, Samsung has hired away Patrick Patla, general manager and vice president of AMD’s Opteron business; Jim Mergard, an AMD vice president and chief engineer, and Brad Burgess, who was chief architect of a low-power AMD processor design known as Bobcat, suggesting it might enter the chip market for server systems. Google Wallet co-founders Rob von Behren and Jonathan Wall have jumped ship. The creative strategist behind the Call of Duty brand, Robert Bowling, has resigned from game maker Activision. His plans have not been announced. Ewa Dominowska has joined Medio Systems as chief architect as the mobile search and advertising technology vendor makes a big push into analytics. Dominowska is a nine-year veteran of Microsoft, where she created the AdCenter Marketplace team, serving as a principle software architect for development and analytics for the adCenter division. Nintex, a company focused on SharePoint workflow, has hired Ryan Duguid as vice president of product management. Duguid comes from Microsoft, where he held key positions in the Microsoft Office Division including SharePoint Internet Business Manager and SharePoint Enterprise Marketing Lead. Christopher Smith is the new chief technology and innovation officer for Accenture Federal Services. Smith will retire April 7 from the Agriculture Department, where he has been CIO since 2009. Electronic foreign exchange platform FX Alliance has hired Steve Rubinow as CIO. For the past six years, Rubinow has been executive vice president and CIO of NYSE Euronext. Harry Moseley has stepped down as CIO of investment company Blackstone Group after seven years. His plans have not been announced. James Craft, the Marine Corps' deputy CIO, is leaving to become CIO of the the Joint Improvised Explosive Device Defeat Organization, a Defense Department organization that develops and fields technology to thwart the improvised explosive devices that have caused many casualties in Iraq and Afghanistan. He has been in his current role since 2006. American HealthTech, based in Jackson, Miss., has announced that David Houghton will join the company as chief operating officer. As CIO of long-term care provider Advocat in Brentwood, Tenn., Houghton oversaw the implementation of electronic health records in 45 post-acute facilities in less than 18 months. The Center for Digital Government has added Richard McKinney as a senior fellow to its slate of state and local government experts. McKinney formerly served as the government technology adviser for Microsoft State and Local Government. Prior to this, McKinney was CIO for the City of Nashville and Davidson County, a consolidated city/county government. He has also served as the director of information services for the Tennessee General Assembly and as assistant commissioner for the Tennessee Department of General Services. The Center for Digital Government, a research and advisory institute, is a division of e.Republic, a national publishing, event and research company Trinity Health of Novi, Mich., has announced that Marcus B. Shipley has been appointed senior vice president and CIO. Shipley comes from CIGNA, where he was vice president of information technology, IT infrastructure and operations. Scott Studham  is the new vice president and CIO at the University of Minnesota. Since 2009, he has held a similar role at University of Tennessee. The University of Minnesota is about twice the size of the University of Tennessee. Trading Technologies International, a vendor of  technology for derivatives traders, has named Rick Lane as executive vice president and chief technology officer. Lane re-joins Trading Technologies from Google, where he worked as a product manager on its display ad serving technology. He first joined Trading Technologies in June 2010, when it acquired the company he co-founded, TickIt Trading Systems. Elster, which produces technology for measuring and improving the flow of natural gas, electricity and water, has named Mark Munday chief technology officer and appointed Edward Myszka as executive vice president of electricity for North America. Munday joined the company in 1981 and led the North American electricity business for the past 11 years. Myszka most recently was part of the senior executive team at Comverge Inc., a demand response smart grid company. Ken Guiberson will fill the newly created role of CTO at Denver-based user experience agency EffectiveUI. Guiberson joined EffectiveUI in February of 2006 and is currently general manager of the company’s Rochester, N.Y., office. He previously was a software engineer at Kodak Jag Bains is the new CTO for Vancouver, Wash.-based DOSarrest Internet Security. For the past 11 years, Bains has been director of network engineering and operations for Peer1 Hosting. Interactive TV and middleware vendor Alticast has tapped cable industry veteran John Carlucci as its new CTO for the Americas. Carlucci most recently was CTO for IP video management vendor Clearleap. Ivan Koon, CEO of cloud collaboration company YouSendIt, is stepping down as the company looks for new funding. It also has named Stanford Au as CTO. Au is a 25-year veteran of technology companies and most recently was CTO for Skinit, which makes covers for electronic devices. VIDA Diagnostics, a Coralville, Iowa-based developer of pulmonary imaging software, has appointed Philippe Raffy as CTO. Raffy held technical and management leadership positions at R2 Technologies and Vital Images, where he was instrumental in commercializing innovative medical imaging technologies. Steve Davi  is the new CTO for multi-screen video software vendor SeaChange International. Davi, who joined SeaChange in November 1997, most recently was senior vice president of advanced technologies. Encompass Digital Media has announced that Bart Spriester will be joining its executive team as CTO. The company owns and operates broadcast facilities throughout the United States, United Kingdom and Asia. Spriester joins Encompass from Cisco Systems, which he joined in 2006 with its acquisition of Scientific Atlanta. Most recently he served as vice president and general manager for Cisco’s Digital Media Networks. Gilbert, Ariz.-based Infusionsoft, which makes sales and marketing software for small businesses, has named Marc Chesley as CTO. He previously was the company’s vice president of development and technology. Colligo Networks, a Vancouver, B.C., vendor of email and document management solutions for Microsoft SharePoint, has appointed Kerem Karatal to its newly created CTO position. Kerem is a 20-year software industry veteran and entrepreneur who pioneered several innovative technologies, including ActiveX and the web content management module that became SharePoint.