I am 25 yrs old, a team manager with staff and also with ownership of individual contribution work mainly involving original research and analysis. My work is generally 70% managing and 30% own research/analysis; I do the first area bit quite well, but I found it challenging from the start to constantly switch and re-immerse myself into details of the second area.
I understand quite well what I need to do, and I do a good job in terms of the idea and execution... but... my direct boss always spots "distraction mistakes", mostly embarrassing errors such as a wrong plus/minus sign, a calculation typo on Excel, an extra digit "0". I am somehow unable (or too distracted) to spot them myself. When I do the work, it all seems fine and I just submit it. On one occasion, my boss didn't spot my mistake (a really bad one) and it was the clients who found it. My boss didn't comment on the mishap, but it was definitely very embarrassing.
I like my job (overall) and I love learning new things every day, but I feel like I can't help doing this kind of clumsy mistakes - especially because I am not aware of them, and the fact that it is original work (I am the "pioneer", i.e. I have no guidelines to follow in this work; I create them).
I am now seriously worried about my job performance and don't know how to address it / if I should tell my boss.
I don't know what the cause may be, maybe bad work-life balance or stress... but I am not sure.
QUESTION (In response to Joe Strazzere) - well my question is what can I do to keep my job / not get fired and/or also: what can I do to not be clumsy?