School of Science & Mathematics Faculty & Staff School of Science & Mathematics Katie Dixson Administrative Assistant to the Dean kdixson@truman.edu (660) 785-4248 Dr. Stephen Hudman Interim Dean, School of Science & Mathematics; Professor of Biology shudman@truman.edu (660) 785-4638 By Appointment. Personal Pronouns: he/him Dr. Brian Lamp Interim Associate Dean; Professor of Chemistry blamp@truman.edu (660) 785-7251 Current semester schedule is at Personal Pronouns: him/his Agricultural & Biological Sci Dr. Brett Berke Associate Professor of Biology (2015) bberke@truman.edu (660) 785-4609 Spring 2026 (Zoom and F2F; ) Mon 230-420 Wed 1030-1120 Thurs 1030-1 Fri 230-330 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 Monday 11:30 am - 12:20 pm Wednesday: 11:30 am - 12:30 pm and 2:30-2:30 pm Friday 11:30 am - 12:30 pm and 1:30 - 3:30 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 Spring 2026 9:30am-12:00 pm M-R and10am-12pm F in MG 3078, other times by appointment, office hours can be in person or over zoom (ecostello2020) Personal Pronouns: She/Her Dr. Maria Beatriz De Souza Cortez Assistant Professor of Biology (2024) mbscortez@truman.edu (660) 785-4623 Monday: 8:30am - 10:00am Tuesday: 9:00am - 11:00am and 4:30pm - 5:30pm Wednesday: 1:30pm - 3:00pm Thursday: 11:30am - 1:30pm Friday: 8:30am - 10:30am For Office Hours by appointment, please email me at mbscortez@truman.edu Personal Pronouns: she, her, hers Dr. Joanna Hubbard Associate Professor of Biology jhubbard@truman.edu (660) 785-4071 Fall 2025 & Spring 2026: I am on sabbatical this year. If you need to contact me, please reach out via email. Personal Pronouns: she, her, hers Dr. Bob Johnson Assistant Professor of Agricultural Science bjohnson@truman.edu (660) 785-4281 MWF: 10:30 -12:20 and 1:30 - 2:20 Thursday: By appointment Personal Pronouns: he/him/his Josh Kraft Assistant Professor of Agricultural Science jkraft@truman.edu (660) 785-4593 Dr. John Ma Professor of Biology (2005) johnma@truman.edu (660) 785-4619 Fall 2025 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. Stephanie Maiden Associate Professor smaiden@truman.edu (660) 785-4634 Spring 2026 WRF 9-11am (some Thursdays I have a meeting 9:30-10:20 am) Personal Pronouns: She/Her/Hers Dr. Hajeewaka Mendis Assistant Professor of Biology (2021) hmendis@truman.edu (660) 785-4630 Office hours: M - 2:30-3:30PM (By appointment only) T - 11:30AM-12:00PM W - 9:30AM-12:30PM, 1:30-3:00PM; R - 10:30AM-12:00PM, F - 9:30-11:00AM, 1:30-2:30PM (MG3030) Instr. Jeanne Mitchell Instructor in Biology (1992) jmitchel@truman.edu (660) 785-7662 Monday 11:30 - 12:20 and 1:30 to 2:20 Tuesday 9:00 - 11:00 Wednesday 8:30 - 10:20, 11:30 - 12:20, 1:30 - 2:20 Friday 11:30 - 12:20, 1:30 - 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 M 8:30-11:30, 1:30-4:30; W 11:30-1:30; T Th 12:00-1:00 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. 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) MWF 1:30-3, R 1-3 Other times by app't, send me an email! Personal Pronouns: he/him Mary Turner Instructor in Biology mturner@truman.edu (660) 785-4597 Dr. Anton Weisstein Professor of Biology (2004) weisstae@truman.edu (660) 785-4615 For Spring 2026: Tue: 10:30 a.m. – 12:30 p.m. Wed: 2:30 p.m. – 3:30 p.m. Thu: 10:30 a.m. – 12:30 p.m. Fri: 2:30 p.m. – 3:30 p.m. Appointments recommended, but drop-ins welcome. Personal Pronouns: he/him/his Mandi Wiser Administrative Assistant awiser@truman.edu (660) 785-4597 Personal Pronouns: She/Her Agricultural & Biological Scie Albert Meyers Biology Laboratory Technician II ameyers@truman.edu (660) 785-4607 Liz O'Saurus losaurus@truman.edu (660) 785-7110 Computer & Data Sciences Dr. Scott Alberts Computer & Data Sciences Chair and Professor of Statistics salberts@truman.edu (660) 785-7649 Fall 2026 MWF 9:00-10:20 AM Monday: 2:30-4:20 PM TTh 1:30-2:50 PM I'm also available by appointment, and I can turn on Zoom during any office hours if I know you're coming. Zoom link: E-mail me if Zoom isn't turned on at salberts@truman.edu Personal Pronouns: he/his Dr. Tetyana Beregovska Assistant Professor of Statistics and Data Science tberegovska@truman.edu (660) 785-5681 Monday: 11:25 AM-12:25 PM & 1:30-3:30 PM (in VH 2170) Tuesday 12:00-3:00 PM (in VH 2170) and 6:00-7:00PM (on Zoom only, until Spring Break) Wednesday 11:25 AM-12:25 PM & 1:30-3:30 PM (in VH 2170) Thursday 11:15-11:45 AM (on Zoom only) or by appointment in VH 2170 or on Zoom Zoom: 374-869-1286 (Personal Meeting ID) Personal Pronouns: she/her Dr. Sunghoon Chung Assistant Professor of Statistics schung@truman.edu (660) 785-4682 Spring 2026 (Jan 12 - May 1) Tue: 11:50 AM – 1:30 PM, 2:45 – 3:15 PM, 4:45 – 5:15 PM Wed: 11:30 AM – 12:25 PM, 1:30 – 2:25 PM, 3:20 – 5:15 PM Thu: 11:50 AM – 1:30 PM, 2:50 – 5:15 PM Or by appointment — email: schung@ Personal Pronouns: he/him/his Dr. Dean DeCock Professor of Statistics & Director of Assessment decock@truman.edu (660) 785-7367 I will be on sabbatical for spring 2026. You may contact me via email (I will be checking email occasionally) but if you need timely information please contact Dr. Scott Alberts the CDSC Chair. (or Jonathan Vieker for assessment inquires) Dr. Mohamed Elsaeiti Assistant Professor of Statistics and Data Science melsaeiti@truman.edu - Tuesday: 4:30 PM-7:30 PM - Friday: 8:00 AM-11:00 AM - Friday: 1:30 PM – 5:30 PM Additional meetings outside these times may be arranged upon request and availability Personal Pronouns: He/him/his Dr. Hyun-Joo Kim Professor of Statistics; Department chair, Health Sciences; Program Director, Data Science hjkim@truman.edu (660) 785-4693 AT VH 2248 on MW 8:30 AM - 11:00 AM, R 11:00 AM - 12:00 PM AT MG 3076 other times by appointment Personal zoom link Personal Pronouns: she/hers Dr. Kafi Rahman Associate Professor of Computer Science kafi@truman.edu (660) 785-4553 In person office hours: MW: 1:30pm–3:20pm Tuesday: 8:00am–10:50am, 11am–11:50am (zoom), 1:30pm–2:20pm Friday: 12:30pm–1:20pm (zoom) Dr. Gayathri Sadanala Assistant Professor of Computer Science gsadanala@truman.edu (660) 785-4658 MW: 9:30 AM - 10:30 AM, 11:30 AM -12:30 PM, 2:30 PM-3:30 PM F: Virntual Hours, by appointment only. Dr. Nazmul Shahadat Assistant Professor of Computer Science nshahadat@truman.edu (660) 785-7234 My Office Hours (Spring 2025): Monday: 1:30 PM - 4:30 PM (In-person: Effective from 3/2/2026) Tuesday: 1:00 PM - 3:00 PM (Online) Wednesday: 2:30 PM - 4:30 PM (Online) Dr. Carol Thatcher Professor of Statistics clthatch@truman.edu (660) 785-7236 Office Hours for Spring 2026 MWF 8:30-10:30 am TuTh 8:30-10:00 am Zoom only: Mon 3:30-4:20 pm (preference to STAT 535 students) Personal Pronouns: she/her Dr. Scott Thatcher Professor of Statistics thatcher@truman.edu (660) 785-4552 Spring 2026 General Office Hours (in person and via Zoom): MWF 11:30 a.m.-12:20 p.m., MWF 1:30-2:20 p.m., T 10:30-11:50 a.m., Th 1:00-2:20 p.m., and by appointment. Note: If you join the Zoom meeting, please make sure your full name is used as your Zoom name, and be patient if it takes me a minute to let you in. I may be juggling in-person and Zoom students or having a private conversation with a student. Dr. Fujian Yan fyan@truman.edu (660) 785-7233 Dr. Chen-Yeou Yu Assistant Professor of Computer Science cyyu@truman.edu (660) 785-4029 Spring 2026 Office Hours: Mon. to Fri. (By Appointment or walk-in) MWF: 10:30am – 12:00pm; 13:30PM – 17:00PM TR: 13:30pm – 17:20pm Or you can email me your best avaialble time. Zoom meeting link: https://truman-edu.zoom.us/j/8547872384 The meeting ID: 854 787 238 Health Science Dr. Carolyn Cox Professor of Health Science ccox@truman.edu (660) 785-7256 Spring 2026 Office Hours: M-F=9:30-10:30 a.m. & 3:30-4:30 p.m. Dr. Nancy Daley Moore Associate Professor of Health Science ndmoore@truman.edu (660) 785-4455 Spring 2026: Mondays: 8:30 - 9:30 am, 12:30 - 3:30 pm Tuesdays: 2:00 - 5:00 pm Thursdays: 2:00 - 5:00 pm (online only) For office hours, you can drop by my office or sign up for an appointment on . Personal Pronouns: She/Her/Hers Dr. Rolena Stephenson Associate Professor of Health Science rstephenson@truman.edu (660) 785-4309 Spring 2026: Mondays: 8:00 - 9:20 am, 10:30 am - 12:00 pm, 1:00 - 2:30 pm Wednesdays: 8:00 - 9:20 am, 10:30 am - 11:45 am Tuesdays & Thursdays (by appointment only): 1:00 - 2:30 pm Mathematics Dr. Don Bindner Assistant Professor of Mathematics dbindner@truman.edu (660) 785-4258 Contrary to rumor, my office is actually VH2258 and not VH2252.... Office Hours Spring 2026: MTWR 9:30am-10:20am at VH2258 MW 1:30pm-2:50pm at VH2258 TR: 11:30am-12:50pm at VH2258 Or by appointment Zoom link: https://www.zoom.us/meeting/87879004083 (Let me know ahead of time if you want a Zoom meeting.) Personal Pronouns: he/him Dr. David Garth Mathematics Department Chair; Professor of Mathematics dgarth@truman.edu (660) 785-4044 Office Hours (In person or via Zoom) Monday: 10:30-11:20 Tuesday: 1:30-3:20 Wednesday: 10:30-11:20 and 1:30-3:20 Thursday: 1:30-3:20 Friday: 10:30-11:20 Zoom: You can log in using the link Dr. Ian Gossett Assistant Professor of Mathematics igossett@truman.edu (660) 785-4592 Summer office hours: By appointment Dr. Anna Halfpap Assistant Professor of Mathematics ahalfpap@truman.edu (660) 785-4029 Spring 2026 Office Hours Monday: 9:30-10:20 and 3:30-4:20 Tuesday: 9:30-10:20 and 2:30-4:20 Wednesday: 9:30-10:20 and 2:30-4:20 Friday: 10:30-12:20 Dr. Wayne Johnson Assistant Professor of Mathematics and Data Science wjohnson@truman.edu (660) 785-4297 Spring 2026 Office Hours Monday: 9:30am-11:20am Tuesday: 8:30am-9:20am and 1:30pm-2:20pm Wednesday: 9:30am-11:20pm and 1:30pm-2:20pm Thursday: 8:30am-11:20am Personal Pronouns: he/him Dr. Stephen Lacina Assistant Professor of Mathematics slacina@truman.edu (660) 785-4554 Monday 1:30-2:20pm Tuesday 10:30am-12pm and 1:30-2:20pm Wednesday 11:30am-12:20pm and 1:30-2:20pm and 3:30-5:30pm Thursday 12:30-2pm Friday 11:30am-12:20pm Thomas Samuels tsamuels@truman.edu Diane Sandefur Administrative Assistant - Computer & Data Sciences and Mathematics sandefur@truman.edu (660) 785-4547 Monday - Friday 7:00AM to 4:00PM Office is open 8:00AM to 5:00PM (You are welcome to come in at 7:00AM as well. But official hours start at 8:00AM.) Dr. Derek Sparrius Assistant Professor of Mathematics dsparrius@truman.edu (660) 785-7829 Monday: 11:30-12:20 PM, 2:30-3:00 PM Tuesday: 9:30-10:20 AM, 2:30-3:00 PM Wednesday: 11:30-12:20 PM, 2:30-3:00 PM Thursday: 9:30-10:20 AM, 12:30-1:20 PM, 2:30-3:00 PM Friday: 11:30-12:20 PM, 2:30-3:00 PM Dr. Dana Vazzana Professor of Mathematics and Director of Academic Professional Development dvazzana@truman.edu (660) 785-4392 Office Hours Spring 2026 VH 2144 Monday: 2:30-3:20 Tuesday: 12:30-1:20, 2:30-3:20 Friday: 11:30-2:30 Personal Pronouns: she/her/hers Dr. Tony Vazzana Professor of Mathematics tvazzana@truman.edu (660) 785-4547 Personal Pronouns: He / Him / His Mrs. Vanessa Williams Instructor of Mathematics vwilliams@truman.edu (660) 785-4090 Zoom Office Hours Monday - Thursday: 10:00am - 12:00pm Meeting ID: 847 3907 7955 Passcode: 448004 Physical Sciences Ian Clark iclark@truman.edu Dr. Colin DeGraf Assistant Professor of Physics cdegraf@truman.edu (660) 785-4070 Spring 2026 Office Hours: Monday: 11:30-12:20, 4:30-5:20 Tuesday: 11:30-12:20 Wednesday: 11:30-12:20 Thursday: 2:00-3:50 Friday: 11:30-12:20 In addition, please feel free to stop in anytime I'm around! Personal Pronouns: He/Him Dr. Taner Edis Professor of Physics edis@truman.edu (660) 785-4583 . Heather Ervin Chemistry Technician and Laboratory Coordinator hervin@truman.edu (660) 785-7254 Dr. Vayujeet Gokhale Professor of Physics gokhale@truman.edu (660) 785-4594 Personal Pronouns: He/Him/His Dr. John Grutsch Assistant Professor of Chemistry jgrutsch@truman.edu (660) 785-4524 Dr. Hanbo Hong Assistant Professor of Chemistry hhong@truman.edu (660) 785-4625 Spring 2026: Mon: 3 ~ 5 PM, MG 3090 (Chemistry Contact Center, "C3"). Tue: 9:30 ~ 11:30 AM, MG 3144 Wed, Thu, Fri: 3 ~ 5 PM, MG 3144 Personal Pronouns: he/him/his Dr. Tim Humphry Associate Professor of Chemistry humphry@truman.edu (660) 785-4606 For FA23, my office hours are MWF 10:30-11:30. For students in my classes, my office hours are effectively 24h a day via GroupMe. As always, if you want to meet on a different time or day, send me an email or a GroupMe and we will set it up. Dr. Rasanjali Jayathissa Assistant Professor of Physics rjaya@truman.edu (660) 785-4613 M 10.30 -12.30 and 2.30 - 3.30 T 11.30 – 12.30 W 10.30 -12.30 and 2.30 - 3.30 R 11.30 - 12.30 F 10.30 -11.30 and as arranged by an appointment Personal Pronouns: She/ her Dr. Andrew Kauffmann Assistant Professor of Chemistry akauffmann@truman.edu (660) 785-7736 MW: 9:00 AM - 11:00 AM T: 1:30 PM - 3:30 PM Dr. Barbara Kramer Professor of Chemistry bkramer@truman.edu (660) 785-7608 Current office hours are at Personal Pronouns: She/her Dr. Brian Lamp Interim Associate Dean; Professor of Chemistry blamp@truman.edu (660) 785-7251 Current semester schedule is at Personal Pronouns: him/his Dr. James McCormick Associate Professor of Chemistry jmccormi@truman.edu (660) 785-4315 Monday: 1:30 PM - 5:00 PM. Wednesday: 1:30 PM - 5:00 PM Physical Chemistry Study Hall in Contact Center MG 3090. Thursday: 2:30 PM - 5:00 PM. Any other time when I am not in class or otherwise scheduled is available to meet with students. Email or call me to set up a time. All office hours are in person, but can also be via Zoom at . Please let me know if you would like to attend via Zoom, so that I can get things set up. Dr. Peter Ramberg Professor of History of Science ramberg@truman.edu (660) 785-4620 MTWF: 10:30-12:00 (Monday in the Chemistry Contact Center, 11:00-12:20) Or by appointment. or in-person. Dr. Jay Sibbitts Assistant Professor jsibbitts@truman.edu (660) 785-7599 Nathaniel Webber Chemistry Technician nwebber@truman.edu (660) 785-4411 Personal Pronouns: he/him/his Dr. Tim Wiser Interim Chair of Physical Sciences; Associate Professor of Physics tdwiser@truman.edu (660) 785-4603 (Spring 2026) Open Office Hours: MW 2:30p–3:20p T 3p-4:20p For 1-on-1 office hours or advising: Personal Pronouns: he/him Stacey Xander Administrative Assistant - Physical Sciences sxander@truman.edu (660) 785-7599 School of Science and Mathematics