JOIN US

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

Oral History Project

Many alumni will receive emails and postcards to participate in this program. We are working with Publishing Concepts (PCI) to coordinate. They are the company that has done the last two Triangle Directory projects, so can be trusted. This is a legitimate solicitation of your input.

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.

WELCOME TO TRIANGLE

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.
READ MORE

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

States

Triangle Fraternity Welcomes Two New Staff Members to Advance Leadership in STEM

PRESS RELEASE August 15, 2025 Plainfield, IN — Triangle Fraternity, the nation’s premier men’s fraternity for engineers, architects, and scientists, is thrilled to welcome two outstanding professionals to its headquarters staff. Their expertise and passion for...

Triangle Building & Housing Corporation Welcomes Back University of Michigan Chapter to Its Growing Network

PRESS RELEASE August 11, 2025 For Immediate Release Plainfield, IN — Triangle Building & Housing Corporation (TBHC) proudly announces the addition of the University of Michigan Chapter to its portfolio of owned and supported properties. This marks a significant...

Triangle Fraternity Announces Fall 2025 Peer Mentors

PRESS RELEASE Plainfield, IN – Triangle Fraternity is proud to announce the appointment of its 2025 Fall Peer Mentors, a dedicated team of undergraduate leaders who will support the organization’s growth efforts across the country this semester. The following have...

Cast Your Vote: 2025 National Council Election Now Open!

Elections for Triangle’s 2025 National Council slate are officially live! All members in good standing are eligible to vote. Make your voice heard and help shape the future of our Brotherhood.   Vote online now: triangle.org/election25 Deadline: Voting closes at...

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)