Gibson Dunn hires Helgi Walker, ex-Wiley Rein, as partner, with focus...

Gibson Dunn hires Helgi Walker, ex-Wiley Rein, as partner, with focus on appellate, regulatory and complex litigation issues … Undersecretary of Commerce for International Trade Francisco Sánchez will lead a delegation of 13 U.S. company representatives on a cybersecurity and critical infrastructure protection trade mission Sept. 29-Oct. 2 to Saudi Arabia and Kuwait … Allbritton Communications President and Politico CEO Fred Ryan to leave company later this year … NetNumber names Brad Boston to the board of the wireline and wireless signal routing and database service provider, as president and CEO … Dialogic network capacity firm hires Robert Dennerlein, ex-Raritan, as executive vice president-finance, and chief financial officer … Broadcast graphics automation system provider Bannister Lake Software hires Pete Challinger, ex-Pixel Power, as vice president-U.S. business development … Neohapsis mobile and cloud security service firm hires Patricia Wright, ex-Rapid7, as vice president-consulting services.