» Gerald Choung (left) has joined San Diego-based ESET, a security software company, as vice president of sales. Choung will lead the North American sales team and provide strategic direction for ESET's partner and distributor network. Choung worked at a variety of Fortune 500 companies before joining ESET, most recently as senior director of channel strategy and sales for Qualcomm. ESET claims more than 100 million users and employs more than 200 people at its North American headquarters.

» ZeroFOX, a Baltimore-based social risk management company, has acquired Vulnr, a stealth-mode security technology company. Vulnr's founder Mike Price has also joined the company as senior director of research and development. Vulnr's technology will be integrated into ZeroFOX Enterprise, the company's social risk management platform.

» Mary Landesman has joined San Francisco-based Norse, a live attack intelligence firm, as senior data scientist. Landesman will help the company detect and analyze cyber threats and also develop prevention tactics. She has worked in the industry for more than two decade, most recently at Cisco Systems as a senior security researcher. While there, she analyzed data sets to determine the most recent web-based security trends.

» San Francisco-based secure mobile gateway pioneer Wandera announced $15 million in additional funding. This latest funding was led by 83North, with participation from existing investor Bessemer Venture Partners. This brings Wandera's total funding to $23 million.

» William Welch (left) has joined San Jose, Calif.-based Zscaler, an internet security company, as global vice president of sales and chief revenue officer. Welch will scale Zscaler's sales and channel organizations and help accelerate the company's global growth. For more than 25 years, Welch served in executive sales roles at public technology companies. He was most recently the vice president and GM for HP Software Americas, where he was responsible for more than $2 billion in sales. 

» Bastille, an Atlanta-based Internet of Things (IoT) threat detection and mitigation provider, has extended its angel round with a $1 million investment. Funding comes from David Cowan of Bessemer Venture Partners. This is the second time Cowan has backed Bastille's founder Chris Rouland. The extended angel round will allow Bastille to continue engineering and support pilot programs.

» Secure Islands, an Israel-based advanced information protection and control (IPC) solutions provider, has opened its North American headquarters in New York and appointed Paul Gabrik as the executive vice president of sales. Gabrik will develop and manage the company's sales strategies for enterprise customers in the Americas. Previously, Gabrik served as the global sales lead executive/managing partner at Accenture Software Practice.