Science Teacher - St. Mark's

Available Position:        Science Teacher

Department:                 Science                                                            

Date Posted:                 December 2025

Start Date:                    August 2026

About St. Mark’s

Founded in 1906, St. Mark's School of Texas is a non-sectarian, college-preparatory, independent day school for boys in grades one through twelve. The School’s charter states that it is “designed to afford its students well-rounded physical, intellectual, moral, and religious training and instruction.” The School is intended to be a diverse community of teachers and students who share a love of learning and who strive for high achievement in whatever they undertake.

St. Mark’s aims to prepare young men to assume leadership and responsibility in a competitive and changing world. To this end, the School professes and upholds certain values. These values include the discipline of postponing immediate gratification in the interests of earning eventual, hard-won satisfaction; the responsibility of defending one’s own ideas, of respecting the views of others, and of accepting the consequences for one’s own actions; and an appreciation for the lively connection between knowledge and responsibility and the obligation to serve.

Position Description

St. Mark’s School of Texas seeks a dynamic and innovative science teacher.  The holder of this position will teach four upper and/or middle school classes in the Science Department, with the specific teaching assignment to be based on candidate experience and departmental needs.  Although subject-specific expertise is essential in this position, versatility for teaching a variety of courses will distinguish the strongest candidates.  Applicants should have a bachelor’s degree or higher in a scientific discipline and have experience teaching at the high school level.  The ideal candidate is an experienced educator and passionate scientist who is eager to guide and inspire students on their science journey. 

St. Mark’s students are eager and motivated learners, and the science courses are based upon frequent laboratory experiences.  A strong candidate is a content expert who is able to deliver engaging lessons, develop innovative lab activities, collaborate effectively with colleagues, and appeal to the learning styles of a diverse and extremely talented group of boys.  Beyond the classroom, faculty at St. Mark’s participate in a variety of activities that include serving as an Advisor to a small group of students, coaching a sport, sponsoring a club, or participating in the Wilderness Program, depending on experience.  Finally, St. Mark’s School of Texas is committed to character and leadership education, and prospective faculty members should have a desire to help develop these qualities in young men.

 Responsibilities

• Teach four sections of science in the Middle and/or Upper School, with specific classes depending on candidate experience and staffing needs.  Potential subjects include environmental science, chemistry, life science, biology, earth science, geology, astronomy, physical science, and others. 
• Serve as an Advisor to a small group of boys
• Contribute to school programs by participating in the wilderness program, club program, or athletic program, depending on experience
• Participate in the character and leadership education program

Experience / Qualifications & Skills

• A mission-guided approach to teaching that aligns with St. Mark’s Statement of Purpose
• A collaborative, generous, enthusiasm for teaching and working in partnership with colleagues across the campus
• An understanding of the values of St. Mark’s and a desire to contribute to the community in ways that make the School the best version of itself

• A bachelor’s degree in a scientific field is required; a master’s degree in science or science education is preferred.    
• Five or more years teaching science at the high school or advanced middle school level; independent school experience is a plus.
• Knowledge of varied teaching strategies and fluency with a variety of technology tools to advance learning
• Enthusiastic and collaborative approach to working with colleagues
• Passion for subject matter and for working with young people

Qualified applicants should visit our website to complete an online application

including a letter of interest and a resume.

St. Mark's School of Texas does not discriminate in any employment practice on the basis of race, color, national or ethnic origin, religion, gender, sexual orientation, disability, age, or veteran status.