The phrase "acquire extensive experience" is correct and usable in written English.
You can use it when discussing the process of gaining a significant amount of knowledge or skill in a particular field or activity.
Example: "Through various internships and projects, I was able to acquire extensive experience in digital marketing."
Alternatives: "gain substantial experience" or "obtain considerable experience."
In doing so, they acquired extensive experience in developing sturdier equipment and materials – such as chew-proof wires — which helped them later on to gain several big business accounts in the Middle East, where similar problems stymied the multinational firms.
Many members of the Fountain Valley wrestling program enter high school having already acquired extensive experience in the sport.
As expertise develops and medical students acquire extensive clinical experience, they develop the ability to recognize and manage symptoms efficiently and effectively.
The Spallation Neutron Source (SNS) has acquired extensive operational experience of a pulsed proton superconducting linear accelerator (SCL) as a user facility.
A Peruvian jeweler helped him source the gold and acquire extensive quality certification, but the abandoned mansion was acquired through pure luck.
A graduate (1914) of the United States Military Academy at West Point, New York, Spaatz served as a combat pilot during World War I and then acquired extensive staff and command experience between 1919 and 1942.
Specialists such as taxonomists and prepared technicians can distinguish taxa accurately, since it requires extraordinary aptitudes acquired through extensive experience.
Mr. Smiley's family acquired extensive landholdings in Ulster County in the 19th and early 20th centuries.
For this purpose, a 150 kWt CFB combustor test unit is designed and constructed in Chemical Engineering Department of Middle East Technical University, based on the extensive experience acquired at the existing 0.3 MWt Bubbling Atmospheric Fluidized Bed Combustor (AFBC) Test Rig.
And Lala, which was acquired by Apple in December, has extensive experience working with Facebook Connect (they also power Facebook's song gifting feature).
