Interested in joining a Triangle chapter or know someone who is?

Invest in Triangle Through a National Voluntary Alumni Dues (VNAD) payment

Pay Chapter Invoices Online

Have a chapter invoice? Pay from the comfort of your computer.


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 – April, 2021

New Education Fee Proposal For almost a year, Fraternity and Foundation board members have been working to determine a way to lower the cost of active membership without huge cuts to the annual budget.  We believe we have a solution by lowering the National Active Fee...

National Education Fee Proposal

Chapters have asked if there are ways to reduce the costs of membership.  Over the last year, we have worked on a way to address that issue.  We believe we have a good solution and we are proposing legislation this summer to implement it.  Here is information...

HQ News – March, 2021

Virtual Founders Day 2021 - April 17 at 3 PM EST Join Triangle Fraternity for Founders' Day 2021 taking place on Saturday, April 17th at 3 pm EDT. Hear from National President, Joe Cerrato, receive updates from the fraternity, find out who is initiate #30,000 and...

HQ News – February, 2021

Initiate #30,000 Update Triangle is about to celebrate initiate number 30,000! How long has it taken to reach this goal? Here's a list of our significant National Serial Numbers (NSN) and years it took to reach them. National Council will approve special recognition...

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)