The phrase "assumed the highest" is correct and usable in written English.
It can be used when discussing someone taking on a position of great importance or responsibility, often in a hierarchical context.
Example: "After the recent restructuring, she assumed the highest role in the organization, overseeing all operations."
Alternatives: "took on the top position" or "accepted the highest office".
POPE FRANCIS is about to undergo the greatest test of his diplomatic and inter-personal skills since he assumed the highest office in the Christian world just over a year ago.
He assumed the highest position in the land after a rambunctious career as a unionist and activist.
Problems in Papua New Guinea and Fiji have probably assumed the highest profiles.
low home death population assumed the lowest rate of 128 deaths at home per 1000 cancer deaths (Norway); medium home death population assumed the mean across the six European countries (278 deaths at home per 1000 cancer deaths); high home death population assumed the highest rate of 454 deaths at home per 1000 cancer deaths (the Netherlands).
I refer to the entirety of modern U.S. history before January, when Trump assumed the high office he now dishonors.
In the brain of mammals such as the cat, the olfactory bulb is still important, but the greatly expanded cerebrum has assumed the higher neural functions of correlation, association, and learning.
Thereby, we assumed the higher contact duration value of every pair of contact reports to be true.
The Naval Science program prepares students to assume the highest responsibilities of command, citizenship, and government.
Federal rules require that appraisers assume the "highest and best possible use" for the property to be appraised.
Sanders would probably discover, were he to assume the highest office in the land, the virtues as well as the limitations of compromise.
Fraternities often assume the highest, or at least the loudest, profile on campus, even though in most cases, the majority of students do not belong to the Greek system.
