Should I give an assessment to DevOps Candidate We're a software team currently trying to hire a DevOps Engineer.

We have an assessment for Software Developer candidates and we're currently evaluating the idea of having an assessment for our DevOps Engineer candidates. Since we have not hired DevOps people before and barely know a few, it would help us greatly.

What would be your advice ? 
If you support there should be an assessment, then what would be the content ?

EDIT(Additional Info):


We need to hire a DevOps Engineer to bootstrap our all DevOps process/culture.
We have more than 100 servers. Around 20 different apps on them.
We want him/her to;


Install a main devops tool like Jenkins or Teamcity 
Build the pipelines for all this apps and servers
CIntegration, CDelivery, CDeployment depending on what app does
help migrate to Linux and/or docker



About assessment


It must be about building and deploying a few apps interacting with each other to different targets with different configurations.


EDIT 2(answers):

Thanks for answers. While reading them, I'll answer the questions to make the backstory clearer.

@taleodor


Developers including me are doing provisioning/build/deployments. We're very unhappy about that.
Unfortunately, we can only hire one person for all our expectations. 


We have plenty of time to put everything together, so it should not be problem for anyone who's willing to do all the stuff.

Assignment will be take-at-home and candidates will be given a few days to complete. No problem about that. After all assessment is complementary to interview.
I know a few DevOps people. I may get their help for evaluating assessments.


@030

I agree the devs automating their stuff is much better than another person doing that. But we have a big backlog about devops. We need someone to show us the way while doing the bulk of it himself/herself. We are not considering to totally forget the process. We want exact opposite: we want to do things right but we don't know where to start and don't have time.

I installed Jenkins. Set up pipelines for some of the projects. But I am a senior developer. Neither me nor my executive wants my all time spent on this.

EDIT 3(What I came up with):

This is roughly the assignment I brought together. What do you think ? What else can be here ?


Install Jenkins on a platform on your choice
Dockerize .net project given.
Build two pipelines with unit test automation.
Build and host database.
You must be delivering us your scripts and an account to jenkins.
Yes, there absolutely should be an assessment, however it would be a good idea to agree upfront with one of the few DevOps people you know to validate the content and results.

Regarding the contents of the assessment, there are some questions still remaining after your edits. Key one is how your operations are done. Possible options are: you already have someone doing your server infrastructure and operations and looking for a purely CI/CD person, or you do not have good operations support (i.e. developers doing that and you're unhappy) and you need DevOps person to do server management too. Note, that if it's the later case, you'd probably need more than person over time but you need somebody senior to start with.

Note, that for larger organizations you'd find more specialization within DevOps (i.e. things like Release Management, DevSecOps and others), but for smaller companies those two - CI/CD vs Infra Operations are two main ones in my experience. You still need to keep those differences in mind if you're considering taking someone from a larger company.

Now, after answering those questions, you need to first establish the seniority level of a person you're looking to hire. If it's your first DevOps person - you would probably want somebody more senior, but it depends on other people in your existing team. Next you scope your assessment to the on-job tasks. My take - always give take-at-home assignments, I usually give it to candidates over weekend and I make sure they take no more than 3-4 hours.

For CI/CD case you may ask them for a simple CI pipeline in their tool of choice, built from scratch over some sample project. You should add extra questions about failure handling, parallelizing, caching, handling of automation tests.

For CI/CD + operations case you should add tasks about shell scripting, cloud security, terraform.

Also for the first DevOps / senior person it's always a good idea to add some questions about interacting with other teams. I.e. what developers would need to do and how the interaction process with them should be built.

Again, start with one of the few DevOps people you know and get them onboard as a consultant to assess and hire that first person, otherwise you're taking a lot of chances there - and DevOps is a pretty sensitive part of your business.