 If you liked
Uchuu Kyoudai
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 ...then you might like
Megumi no Daigo: Kyuukoku no Orange
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If you like anime with real life or feel like watching one, these two series are surprisingly similar. In Uchuu Kyoudai it's about space exploration and in Meguni no Daigo it's about firefighting. In both series problems get often solved with real life engineering.
Both series have similar character relations and the storytelling itself feels really familiar. The artstyle and orange suits, I thought I couldn't find any similar series to Uchuu Kyodai but Megumi indeed is one of the closest I have seen.