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Triangle is the only men's STEM fraternity experience, open to engineers, architects and scientists. We provide a social experience with a focus on academic success and professional preparation.

Support Triangle Fraternity

Initially, I joined as a way to make new friends and find people with similar interests. As I became a part of the brotherhood, I found that I could work on more professional skills in terms of working different positions in the organization. All of the positions I have held have taught me things that I can use later in life.
Jeremy Westrich

University of Wisconsin at Milwaukee

Triangle taught me how to lead, through professional development and executive position opportunities. The work I’ve put into this organization has reciprocated tenfold by providing me with the network, tools, and skills I need to further my career. I am certain that joining has been the single greatest decision in my life.
Kurt Paul

Cal Poly - Pomona

Five years ago, I wanted nothing to do with joining a Fraternity.  Here I am now, 5 years later, in Triangle, serving as a founder and President of a new colony. Triangle has a place in my heart now, and it will characterize my time in college.
Tyler Blankenship

Rose-Hulman Institute of Technology

Being in Triangle I’m surrounded by guys who want to make the most of their college experience. They’re guys who help each other with classwork, guys I go to football games with, and guys I enjoy being around. Joining Triangle Fraternity was the best decision I could have ever made.
Nathan Nash

Colorado State University

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Living Alumni


Fall 2021 Message to Parents & Students

NOTE: The last few semesters have been particularly challenging to college student populations. We welcome students back to campus, but ask everyone's help to ensure their year is productive, healthy and safe. Dear Parent(s) and Caregiver(s): We hope that you and your...

Triangle HQ News – End of Fall 2021

REGISTER FOR LTW TODAY! Information and registration links are now live at the LTW website HERE. We are hosting three tracks in person at Jameson Camp in Indiana - Steven L. Miller Presidents Leadership Academy, Recruitment Chairs and Treasurers. The other three...

HQ News – October, 2021

LTW SITE IS LIVE!Information and registration links are now live at the LTW website HERE. We are making our plans to hold the event in person again in January at Jameson Camp near Triangle Headquarters in Indiana, but will have a virtual option if needed. Six tracks...

HQ News – September, 2021

FALL 2021 PRESIDENT'S MESSAGE All active members, new members and alumni volunteers should have received an important email message from President John Cottage regarding returning to campus in Fall. This message and an additional message to parents can be found...

National Headquarters Address

120 S. Center Street
Plainfield, IN 46168
P | (317) 837-9640
F | (317) 837-9642

Office Hours

Monday through Friday
9 a.m. to 5 p.m. (Eastern)