Along with references on LinkedIn, I also have these from my recent work in a Perl monolith system.
I worked with Clive for over three years on a large custom e-commerce platform written in Perl. Clive's deep knowledge of Perl, the larger Perl ecosystem, best practices, and idioms and design patterns has brought significant value to the code base we worked on together. Clive created elegant solutions in many areas; including application observability and a standalone API and routing framework. His work is always driven by a desire to make the software and other developers as efficient as possible - resulting in performant and maintainable code. Clive is able to clearly articulate the benefits of his engineering decisions and I've always enjoyed and learned from our technical discussions. I highly recommend Clive as a software engineer, architect, and team member.
I have had the privilege of working with Clive for the past three plus years on the e-commerce foundations team at Estee Lauder. Before that, even though we didn't know each other personally, I have observed and interacted with Clive via his contributions and activity in the general Perl software development community where I am also a part. His insights he has provided for many, many years in software development forums like the PerlMonks website have been productive and selfless in helping people learn about our core technologies in the software environment that he, me, and people like us work in every day. Quickly after getting to work with him professionally at Estee Lauder, we frequently have paired to work through tasks and issues in a productive and efficient manner. His expertise in Perl programming and software development is invaluable and he will be missed on our team and will be an asset as one of the most proficient Perl programmers known in the Perl programming community.