If you want to find a capable DevOps team, you need to take some time and complete a few actions. First, define your business and technical requirements, business objectives, and list the essential questions you should ask potential vendors. Next, study the internet and DevOps company listing sites like Clutch and GoodFirms for 4-5 teams.
When checking teams, check out tech capabilities, tech stack, years of experience, expertise, completed projects, list of clients, specialization, etc. Then, during the personalized interviews, ask your questions and pay attention to the communication flow, the team's involvement, and the transparency of their processes.
The final task is to use the request for proposal (RFP) document to include the vital metrics for you. Then, by comparing these criteria among the shortlisted DevOps teams, you can finalize your decision.