The phrase "ambitious someone" is not correct and does not sound natural in written English.
It could be used in a context where you are trying to describe a person who is ambitious, but it would be better to rephrase it.
Example: "She is an ambitious person who always strives for success in her career."
Alternatives: "ambitious individual" or "driven person".
On some level, this anxiety was a part of what made me an ambitious person, someone who is imaginative and caring -- not cold and unfeeling.
With its mixture of quaintness and industry, Luna Parc could be the home of an aggressively ambitious elf, someone who worked for Santa and got tired of the arctic weather and the December deadlines.
Although Bharara's approach to policing white-collar crime found many critics, he was an effective, ambitious prosecutor, someone who strongly believed in the concept of justice and fairness, and who targeted corrupt Democrats as well as Republicans.
But I've come to a startling truth about myself: I might be happier with a less ambitious partner, someone less focused on his career and curing the ills of the world and more focused on me, actually, and the piddling details of our family life.
"I thought [her proposed project] was far too ambitious" for someone doing a residency, Jamieson says.
He foresees no possible replacement for the dead empress, though someone ambitious to have a tool in court offers him a concubine who is very like her.
It takes someone ambitious and proactive to attempt a replacement for something so fundamental as JPEG.
It's an ambitious goal for someone with a crazy idea.
It's an ambitious mandate for someone who had never lived or worked in Korea until a few months ago.
Coauthor of books with such chefs as Thomas Keller and Eric Ripert, and coauthor of another book on making charcuterie at home, Ruhlman makes it clear he is going for the ambitious home cook, someone for whom the kitchen is as much a hobbyist's workshop as it is a place of necessity.
