Management Team

CSignum’s leadership team is led by Chief Executive Officer Chris Brooks and includes leaders of strategy, sales and engineering.  The team sets company strategy, drives innovation and supports a culture of collaboration, integrity and a customer first mindset.

Chris Brooks


Chris joined CSignum in October 2020 as CEO. With more than 35 years experience across several industry sectors, his primary focus in each has been developing customer solutions and international growth coupled with organisational cultural development. Chris has been President of a private equity backed subsea engineering business focused on the installation of subsea umbilicals, flowlines and cables and Sales Director for a large, multi-national installation and maintenance provider to the subsea telecommunications sector and more recently was Group CEO with a private equity backed business centred on the subsea construction sector.

Chris has lived and worked in many different countries: New Zealand; Australia; Papua New Guinea; Singapore; USA and the UK and has led projects worldwide. He has specific subsea marine business development experience in North and South America, Asia, India and Europe and has served on the board of several companies internationally.

Mark Rhodes

Chief Technology Officer

Mark is the original inventor of digital through water radio communications and has over 30 granted patents in this field.

He has a track record of innovation, and translating technology into commercial product development, in a broad range of technology areas including cellular communications, airborne radar, industrial condition monitoring and fiber optic communications. 

He believes the RadiEM Modem is just the start of the innovation possible with the RadiEM platform, which provides a building block approach to rapidly developing solutions that meet the digitization needs of our customers.

David Leslie

Chief Revenue Officer

David has been advising CSignum on market positioning and possible new use cases for the revolutionary RadiEM technology that promises to unlock far greater ROI from digital systems and assets deployed in natural waters and manmade water systems. With over 30 years in enterprise computing, networking and telecommunications, David has developed a specialty in recognizing, educating and evangelizing the benefits and positive business impact of technologies, fostering the adoption and traction of exciting new markets and opportunities.

Prior to joining CSignum, David served as Chief Commercial Officer of Gadget Software and as advisor in scaling go-to-market operations at The Modern Data Company. He was President and CEO of the MedicAlert Foundation, co-founded and led companies such as ZippSlip and Intersect Software Corp., and served in senior executive sales positions at Ericsson, Torrent Networking, Newbridge Networks, and UB Networks. He holds a BA in Economics from the University of California, Berkeley.

Blair McDonald

Chief Operating Officer

Blair McDonald runs the Operations Team at CSignum, those tasked with working with, developing and innovating our existing solutions, to ensure that RadiEM, in its current and future phases, will embody the latest interfaces to enable easy to use, game-changing optimum connectivity from where data is gathered, to where it needs to be.  Blair’s team deliver EM solutions that save our clients time, money, and resources, as well as promote better HSEQ, because they have more data, more frequently, with mitigated risk for human lives, while producing more value for their businesses.

Stefan Videv

Chief Innovation Officer

Stefan is at the cutting edge of wireless communication research, with over 60 peer reviewed publications in premier IEEE journals. Stefan has partnered with numerous industry leaders to develop communication prototypes and is excited by the unique possibilities that RadiEM technology creates.

Fraser Galloway

Product Manager & Chief Engineer

Fraser is the Product Manager & Chief Engineer at CSignum and is highly experienced at bringing together multi-disciplinary systems and products from his time working in senior level roles in the Oil & Gas and Consumer Electronics industries.

Fraser graduated from the University of Edinburgh and holds a 1st Class Master degree in Electronics & Electrical Engineering and is a Chartered Engineer with the IET. As a technical authority he has successfully designed and tested multiple high-value subsea control systems and has also created numerous large-volume RF consumer electronics devices such as phones and headsets.

As a result, he has a unique insight into systems and the challenges and opportunities of creating wireless communications systems/products in the underwater environment.

James  Dettmer

Service Delivery Manager

James joined CSignum in 2021 as Service Delivery Manager. He has over 20 years’ experience in various sectors, in particular aviation, and his roles have included Engineering, IT and Airport Operations, as well as Project and Programme management. He is a keen advocate of Collaborative Business Relationship Management.