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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

Total Initiates

Active Chapters

Current Active Members

Active Colonies/Interest Groups

Living Alumni


COVID Response Resources

What All Chapters Should Be Doing for Fall: Provide a copy of any campus, city or state policies related to COVID-19 to all active members and reinforce expectations Compose letter to parents to let them know… - Student health and safety is a primary concern - What...

Triangle COVID-19/Coronavirus Statement

Brothers, Alumni, Volunteers & Friends: Triangle Fraternity’s National Council and staff is committed to promoting the health and safety of its members.  As COVID-19 continues to spread and impact our partner institutions, Triangle is working to support our...

HQ News – July, 2021

NEW EDUCATION FEE PROPOSAL PASSES During Triangle's online Convention, the proposal to create a new Education Fee passed with an almost unanimous vote in favor.  This fee makes it possible to reduce the National Active Fee and can be paid by funds from Chapter...

National Education Fee Proposal

UPDATE: On June 26, during Triangle's online convention business meeting, the Education Fee proposal was adopted by a vote of 69 in favor, 2 against, and one abstention.  We will now be working to have the change to the Constitution & Bylaws ratified by the...

HQ News – May, 2021

TRI-CON 2021 - JUNE 26/27 Registration is now open for this summer's TRI-CON 2021 Online Convention. Active organizations are allowed two delegates and alumni organizations - including recognized area alumni groups - are allowed one delegate. Delegates will vote...

TRI-CON 2021 – Triangle Online Convention

  TRI-CON 2021 | June 26/27 Triangle's First Virtual Convention In an abundance of caution, National Council made the decision in January to postpone our Orlando Convention until July 7-10, 2022. However, we have business to conduct including legislative...

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)