Sysco, the $39.2 billion Houston-basedfoodservice supplier, appointed Ajoy Karna seniorvice president of finance, which is a new position for the company.Karna worked in finance at PepsiCo and its subsidiary Frito Lay forthe past 11 years in positions including senior vice president offinance at Frito Lay and senior vice president of mergers andacquisitions and PepsiCo. Earlier, he worked at Quaker Oats beforeits merger with PepsiCo in 2001.

Northrop Grumman, the $26 billion Falls Church,Va.-based defense contractor, named PrabuNatarajan treasurer and corporate vice president. Hesucceeds Mark Caylor, who was appointed corporatevice president and president of enterprise shared services at thecompany. Natarajan has served as vice president of tax sincejoining Northrop Grumman in 2011 and will retain his taxresponsibilities as treasurer. Prior to joining Northrop, he workedfor 10 years at AES Corp, and earlier was a senior manager forPricewaterhouseCoopers' global tax optimization planning team.

Lincoln Financial Group,a $10.6 billion Radnor,Penn.-based life insurance company, named JohnRhodes chief risk officer. The chief risk officer role waspreviously filled by the company's CFO, RandyFreitag. Rhodes, 40, has served as head of equity riskmanagement since joining the company in 2009 and will continue tofill that role. Prior to joining Lincoln, Rhodes was head ofhedging operations and performance management for the retailannuity unit of ING U.S. Financial Services. Earlier, he worked inrisk management at JPMorgan Chase and GE Capital, and was anofficer in the U.S. Navy.

Diageo North America, the $1.2 billion Norwalk,Conn.-based beer, wine and spirits company, appointed GregKryder CFO. He succeeds Chris Davies, whowill work with Diageo in the U.K. Kryder, 46, most recently servedas president of Diageo Chateau and Estate Wines, and he joined thecompany in 2002 as vice president of finance for that unit.

Aspect Software, a $515 million Chelmsford,Mass.-based communications and contact center software developer,named Bob Krakauer CFO and executive vicepresident. He succeeds Michael Provenzano, wholeft the company to pursue other interests. Krakauer, 46,previously was interim CFO at Genesys TelecommunicationsLaboratories and earlier served as CFO at Global Foundries,Lifelock Inc. and MagnaChip Corp.

Advocat, a $314 million Brentwood, Tenn.-basednursing home operator, named James McKnight CFOand executive vice president. He succeeds GlynnRiddle, who left the company earlier this month to pursueother opportunities. McKnight, 37, joins from NuScriptRX, where hewas CFO. He previously worked as corporate controller of theemployer solutions group of Take Care Health Systems.