The best way to contact Kaelen is through email at kaelenmedeiros at gmail dot com.
To read their opinions on data science and cats, Twitter is a good place to start.
If LinkedIn is more your bag, click to go there and see a pretty cute headshot + more detailed info on Kaelen’s work.
If their code interests you, try Github. Though much of the code they write is proprietary, and therefore not visible, you can start to get an idea of what they’re up to.