The phrase "assertive presence" is correct and usable in written English.
It can be used to describe someone who has a confident and commanding demeanor in a particular situation or environment.
Example: "Her assertive presence in the meeting helped to steer the discussion towards a productive outcome."
Alternatives: "confident demeanor" or "commanding presence".
In the standard repertory, van Zweden is an assertive presence, not always to satisfying effect.
Although the individual paintings are small, the group has an assertive presence.
Mr. Hayes was a less assertive presence, but he locked in well with Mr. Raymer, a smartly physical drummer.
Darius Vassell, once more an assertive presence, fought to reach a pass from his fellow substitute Owen Hargreaves.
Tall, slender and boyishly handsome, with an explosive intelligence and assertive presence, she made sexual gratification an evangelical pursuit.
Tensions between Pacific rim leaders over China's assertive presence in the region have dominated the summit in Manila.
She is the most elusive member of the family, drowned out by the more assertive presences of children and husband.
Odd arrangements of shreds and patches, with legs, arms and other components distorted or missing, the figures are still assertive presences that, like animals, seem totally unaware of their physical appearance.
Nor will admirers be surprised by Gold's welcome gusto as a stylist: His prose overall boasts an assertive, assured presence, unafraid of appealing directly to readers in the realization of its purpose.
American intelligence officials say President Vladimir V. Putin, a former K.G.B. officer himself, is in the process of reviving Moscow's security services, and an increasingly assertive Russian presence in the United States seems to fit that pattern.
Hiroki Kuroda, the Yankees' solid veteran, and Yu Darvish, the Texas Rangers' rookie sensation with baffling stuff and an assertive mound presence, became the seventh set of Japanese starters to face each other in the major leagues.
