Sonardyne International Ltd
Engineering ServicesEngland, United Kingdom201-500 Employees
Sonardyne International Ltd is a United Kingdom–based engineering services company specializing in underwater technologies for energy, defence, and science. Based in Yateley, England, it employs between 201 and 500 people. The company offers capabilities to navigate, position, communicate, image and measure underwater, enabling operations at any depth or duration and from both crewed and robotic platforms. In 2025–2026, Sonardyne announced new collaborations and clients, including a memorandum of understanding with AMOG to develop an integrated subsea asset monitoring service, and partnerships with Njord Survey, Cellula Robotics, and Oregon State University, along with the launch of Observer: intelligent subsea monitoring. Reported revenue falls in the range of $10 million to $25 million.