Science Department

The Science Department strives to teach the following skills to every student: to develop the ability to think in a scientific manner, to provide students with factual information in all aspects of science, to make use of laboratory experiment and problem solving techniques, to emphasize the importance of observing as a means of gathering useful data, to teach critical thinking by analyzing, interpreting, and drawing conclusions or inferences from data previously gathered in the lab, to stress the relationship between science and mathematics so that students may come to understand the built-in logic of science, to emphasize the formulation of hypotheses and theories in relation to these facts to provide students with a well organized picture of the nature of science, to improve students understanding and appreciation of the historical development of the various sciences, and to provide an atmosphere in which students will gain an appreciation and respect for creation and to see the possibility of going where no one has gone before.


Mary Wakumoto
Science Department Coordinator
Mary Wakumoto graduated from Massachusetts Institute of Technology with both Bachelor’s and Master’s degrees in Electrical Engineering. After working for Lockheed, Motorola, Hewlett-Packard, and FEI Microwave, Ms. Wakumoto earned a Master’s degree in Education from Stanford University. Before coming to Mullen High School, she taught Physics, Mathematics, and Electronics at a variety of private, public and international high schools and at Pasadena City College.
Jennifer Bohnsack
Science Department
Jennifer Bohnsack is a graduate of Arizona State University with a Bachelor of Science in Nursing. She also has a secondary science teaching certification and Cell Biology degree from Western State College. Jennifer has three children and enjoys hiking, cooking, reading and spending time with her family.
Natasha Clauson
Science Department
Natasha Clauson graduated with a Bachelor's of Arts degree from Wesleyan University, majoring in Chemistry, Molecular Biology, and Mathematics.  She completed a Master’s Degree in Molecular Biology at Wesleyan University.  Ms Clauson is in her second year as a Science Teacher at Mullen High School. She teaches Chemistry, Physics, Engineering, and Forensic Science.
Mara Dougherty
Science Department
Bio not available.
Elliot Gray
Science Department
Elliot Gray graduated with a Bachelor of Science in Chemistry and a minor in Business Administration from Butler University. Upon graduation, Mr. Gray worked as a chemist in central Indiana from 2012 to 2014. He completed the Teach for Indiana Program at Anderson University. After completion, he relocated to Colorado. Mr. Gray is in his first year as a science teacher at Mullen High School. He is an assistant coach for boys' and girls' cross country.
Joey Mahmood
Science Department and Head Athletic Trainer
Joey Mahmood is a native of Colorado.  He earned his bachelor degree in Human Performance and Sport with a concentration in athletic training form Metropolitan State University of Denver in 2011.  Joey is the head athletic trainer and he also teaches comparative anatomy, physiology and sports medicine. .
Julie Metcalfe
Science Department
Bio not available.

Pete Speissbach

Pete Spiessbach
Science Department and Mathematics Department
Pete Spiessbach is a Mullen High School graduate (Class of 1998) and earned a Bachelor of Science degree in Chemistry and Mathematics from Regis University. Mr. Spiessbach also holds a Master's degree in Chemical and Life Science from the University of Maryland. Mr. Spiessbach is currently teaching AP Chemistry, Chemistry, Physics, and Biochemistry and is the boys' Junior Varsity basketball coach.
Teresa Ulmer
Science Department
Teresa Ulmer graduated with a Bachelor's degree in Biochemistry and Biology Education from Purdue University and received her Masters degree in Educational Leadership and Supervision from the University of Colorado at Denver. Mrs. Ulmer has taught for 15 years and is in her 10th year as a Science Teacher at Mullen High School. She teaches all levels of Biology.


Contact Dean's Office

Mr. Joe Welling
Dean of Students
303.761.1764 ext. 3314

Mrs. Gail Andrews
Attendance Office

© 2015 Mullen High School 3601 S. Lowell Boulevard, Denver, Colorado 80236
P: 303.761.1764 | F: 303.761.0502

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