Agricultural and Biological Sciences Faculty & Staff To quickly jump to a section, select one of the tags below. Department Chair Administrative Assistant Faculty Farm Manager Laboratory Technician Department Chair Dr. Drew Sieg Agricultural & Biological Sciences Chair and Associate Professor of Biology rsieg@truman.edu (660) 785-4605 Open Office Hours Via or in person (MG 3054) Tuesday / Friday 9-11am Other times by app't, send me an email! Administrative Assistant Mandi Wiser Administrative Assistant awiser@truman.edu (660) 785-4597 Personal Pronouns: She/Her Faculty Dr. Brett Berke Associate Professor of Biology (2015) bberke@truman.edu (660) 785-4609 Fall 2026 (Zoom and F2F; ) Mon 330-430 Tues 1-230 Wed 1030-1230 Fri 330-430 Appointments can also be scheduled upon request Personal Pronouns: he/him/his Dr. Sarah Berke Assistant Professor of Biology sberke@truman.edu (660) 785-7133 Tuesday: 9:30 - 11:30 am Wednesday: 1:30-3:30 pm Friday: 10:30 am - 12:30 pm Or by appointment Personal Pronouns: she/her Ms. Emily Costello Lecturer in Agricultural Science, Equestrian Show Team Coach ecostello@truman.edu (660) 785-7204 Fall 2026 My office hours are from 10:30-12:20 pm MF, 9:30-11:20am T, 9:30-1:20pm R, or by appointment. Office Hours can be done in person in MG 3078 or over zoom at ecostello2020 Personal Pronouns: She/Her Dr. Maria Beatriz De Souza Cortez Assistant Professor of Biology (2024) mbscortez@truman.edu (660) 785-4623 Monday: 3:30pm - 5:30pm Tuesday: 9:00am - 11:00am Wednesday: 3:30pm - 5:30pm Thursday: 11:30am - 1:30pm Friday: 10:30am - 12:30pm For Office Hours by appointment, please email me at mbscortez@truman.edu Personal Pronouns: she, her, hers Dr. Rachel Harman Assistant Professor of Agroecology rharman@truman.edu (660) 785-4278 TR 8:00 - 10:00, WF 1:30 - 2:30, or by appointment Personal Pronouns: She, Her, Hers Dr. Joanna Hubbard Associate Professor of Biology jhubbard@truman.edu (660) 785-4071 Fall 2026: Tues / Thur: 1:00 pm – 3:00 pm & Fri: 10:30 am – 12:00 pm By appointment: Personal Pronouns: she, her, hers Dr. Ariel Hughes Assistant Professor of Biology ahughes@truman.edu (660) 785-4624 T&R 10:30am-11:30am, 2:00pm-3:00pm, F 10:30am-11:50am, or by appointment Personal Pronouns: She/Her Dr. Bob Johnson Associate Professor of Agricultural Science bjohnson@truman.edu (660) 785-4281 MWF: 10:30 -12:20 or by appointment Personal Pronouns: he/him/his Josh Kraft Instructor in Agricultural Science jkraft@truman.edu (660) 785-4593 Dr. John Ma Professor of Biology (2005) johnma@truman.edu (660) 785-4619 Fall 2026 Office hours: Tue/Wed 12:30 pm – 2:30 pm; Thu 12:30 pm – 1:30 pm No office hours during the final’s week. Dr. Hajeewaka Mendis Assistant Professor of Biology (2021) hmendis@truman.edu (660) 785-4630 Office hours: M 3:30 PM - 4:30 PM T 1:30 PM - 4:30 PM W 3:30 PM - 4:30 PM R 1:30 PM - 4:30 PM, 9:00 AM - 10:00 AM F 9:00 AM - 10:00 AM (MG3030) Instr. Jeanne Mitchell Instructor in Biology (1992) jmitchel@truman.edu (660) 785-7662 Monday 9:30 - 10:20 and 11:30 - 12:20 and 1:30 to 2:20 Tuesday 1:30 to 2:20 Wednesday 9:30 - 10:20 and 11:30 - 12:20 and 1:30 to 2:20 Friday 9:30 - 10:20 and 11:30 - 12:20 and 1:30 to 2:20 or by appointment. Zoom ID 614-047-3210 (zoom open by arrangement) Personal Pronouns: she/her Dr. Chad Montgomery Professor of Biology (2007) chadmont@truman.edu (660) 785-4587 Office Hours: M 9:30-12:20, W 11:30-2:20, T/TH 10:30-1:20 And by appointment Dr. Joyce Patrick Associate Professor of Biology (2015) jpatrick@truman.edu (660) 785-4601 My Office Hours for Spring 2026 are: Mondays 1:30-3:20 PM Tuesdays 9:30-10:20 AM and 12:30-1:20 PM Thursdays 9:30-10:20 AM Fridays 10:30 AM-12:20 PM Other hours available by appointment. Personal Pronouns: She/Her Dr. Anton Weisstein Professor of Biology (2004) weisstae@truman.edu (660) 785-4615 For Fall 2026: Tue: 10:00 a.m. – 11:30 a.m. Wed: 1:30 p.m. – 2:30 p.m. Thu: 11:30 a.m. – 1:30 p.m. ...or by appointment. Appointments recommended, but drop-ins welcome. Personal Pronouns: he/him/his Farm Manager Justin Wiles Farm Manager jwiles@truman.edu (660) 785-7477 Laboratory Technician Albert Meyers Laboratory Technician ameyers@truman.edu (660) 785-4607 Liz O'Saurus Laboratory Technician losaurus@truman.edu (660) 785-7110