They work on the core container engine stuff. Aleksa Sarai (who posts in here every once in a while as "cyphar") is the maintainer of runC, which is core to most popular container runtimes (containerd/docker, podman, cri-o/kubernetes, etc.).

They also work on building a platform for trivially deploying and scaling Kubernetes within openSUSE as Kubic[1]. SUSE has a variant of this as the SUSE CaaS platform[2] ("container as a service" platform) product. Kubic is analogous to Fedora CoreOS[3], while CaaSP is similar to RHEL CoreOS that's part of OpenShift[4].

[1]: https://kubic.opensuse.org/

[2]: https://www.suse.com/products/caas-platform/

[3]: https://coreos.fedoraproject.org/

[4]: https://blog.openshift.com/openshift-4-install-experience/