The phrase "and proficiency in the" is correct and usable in written English.
It can be used when discussing skills or expertise in a particular area or subject matter.
Example: "The job requires strong communication skills and proficiency in the use of various software applications."
Alternatives: "and expertise in the" or "and skill in the".
An attempt was made to evaluate pharmacy student's knowledge, attitude and proficiency in the practice of EBM.
Tilbury opened with February Pieces (1959-61), which demonstrated Cardew's youthful virtuosity and proficiency in the compositional languages of mid-century avant garde.
To increase experience and proficiency in the care of bladder exstrophy (BE), the Multi-Institutional BE Consortium (MIBEC) was formed, with a focus on refining technical aspects of complete primary repair of bladder exstrophy (CPRE) and subsequent care.
The test exercises were used to assess the trainees' speed and proficiency in the use of CAD by (1) measuring their performance time and (2) feature count (number of features-of-size used to build the test parts).
Students who plan to study in a non-English speaking country, but are able to take some classes taught in English, must nevertheless have some familiarity and proficiency in the local language.
Students work in small teams to complete a major project demonstrating their understanding of and proficiency in the primary objectives of the course.
The contenders should show both interest and proficiency in that part of the job description.
Here we explore the how the combined effect of the unfolding understanding of biology and proficiency in calculus impact the students' ability to gain a firm foundation in statistical science.
Knowledge of social and political issues and proficiency in non-native languages were the least improved, the seniors said.
President Barack Obama nominated Jon Huntsman to serve as the United States Ambassador to China on May 16, 2009, noting his experience in the region and proficiency in Mandarin Chinese.
