Two pioneers of the software-defined networking (SDN) and network functions virtualization (NFV) community have left CableLabs, the US cable sector's R&D body. Intriguingly, Tetsuya Nakamura has joined Amazon Web Services, where he's now working as part of the telecom-focused team, while Don Clarke says he's taking time off from the industry.

Specifically, Nakamura is currently a partner solutions architect for AWS, effective from March, according to his LinkedIn profile. Clarke's LinkedIn profile lists him as leaving CableLabs the same month, and "enjoying a career break to recharge."

Nakamura led CableLabs' open source research efforts on NFV and SDN and led NTT DoCoMo's mobile network virtualization project from 2011 to 2014, as well as serving as NFV-ISG vice-chairman at ETSI and undertaking various roles at OPNFV and OpenDaylight.

Clarke was one of the original authors of the ETSI white paper that launched the NFV vision in 2012, when the Brit was still at BT.

News of their departure from CableLabs was first reported by Fierce Telecom on Monday.

NFV is, of course, a natural fit for AWS. NFV started with a vision to run network functions on commodity hardware rather than purpose-built appliances, but, in a natural step, advocates now seek to run virtual network functions (VNFs) on cloud platforms -- private, hybrid, or public. And nobody's got a bigger public cloud than AWS.

AWS doesn't talk much in public about its plans for the telco sector, but, like the other major cloud platform giants, it's seeking to expand its portfolio of products and services tailored for communications service providers and vendors and is known to have hired a number of staff with telecom networking experience. Former Ericsson executive Jean-Philippe Poirault is the VP of the Worldwide Telecom Industry Business Unit at Amazon. Industry executives Light Reading has talked to say that unit is already sizeable and growing and that AWS knows what it needs to do to meet the needs of telcos.

And there's lots more for AWS to do. It has already launched a number of services, such as its Global Accelerator connectivity offering, while prospective demand from telcos for edge computing capabilities seems an obvious area for AWS to explore.

Microsoft, meanwhile, is more vocal about courting telcos. (See Microsoft: 5G's Killer App 'Is Staring Telcos in the Face'.)

You're invited to attend Light Reading’s Big 5G Event!  Formerly the Big Communications Event and 5G North America, Big 5G is where telecom's brightest minds deliver the critical insight needed to piece together the 5G puzzle. We'll see you May 6-8 in Denver -- communications service providers get in free!

We've got queries in to both men, as well as AWS and CableLabs, to find out what the personnel changes mean to the two organizations' overall strategies.

Clarke and Nakamura's departure come in the same month that longtime CableLabs CTO Ralph Brown announced he plans to retire in August. Belal Hamzeh, previously VP of wireless technology at CableLabs, has been promoted to CTO. (See CableLabs CTO Ralph Brown sets his exit.)

For more on AWS and telecoms, see:

— Mitch Wagner Executive Editor, Light Reading