Matthew Deffinger: Email & Phone Number

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Security Researcher at Margin Research|Brooklyn, New York, United States

Position:

Security Researcher at Margin Research

Location:

Brooklyn, New York, United States

View Matthew Deffinger's Email

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Last updated: 2026-07-03

Updated: 2026-07-03

Found email addresses for Matthew Deffinger:

Business emails:

d***@bsiengr.com

Personal emails:

d********m@gmail.com,

d******j@mail.uc.edu

Found phones for Matthew Deffinger:

+1-323-***-**34,

+1-623-***-**17,

+1-870-***-**35

A different Matthew Deffinger?

Work Experience 8 years

Security Researcher at Margin Research

Sep 2021 - Current

Software Developer at BSI Engineering

Sep 2018 - Sep 2021

Matthew Deffinger started working in 2018, then the employee has changed 1 company and 1 job. On average, Matthew Deffinger works for one company for 3 years 11 months.

Their professional focus is C (Programming Language), C++, and Java across 3 core areas.

Education

bachelor of science in cyber security at University of Cincinnati

Frequently Asked Questions

What is Matthew Deffinger's email address?

SignalHire found verified email addresses for Matthew Deffinger, both business and personal. Their business email is d***@bsiengr.com, and personal emails include d********m@gmail.com, and d******j@mail.uc.edu.

What is Matthew Deffinger's phone number?

SignalHire found multiple verified phone numbers for Matthew Deffinger: +1-323-***-**34, +1-623-***-**17, and +1-870-***-**35.

How do I contact Matthew Deffinger at Margin Research?

You can reach Matthew Deffinger through SignalHire by unlocking their verified email and direct phone number (free signup, no credit card needed). SignalHire is the fastest route if you need their contact details immediately.

What is Matthew Deffinger's professional background?

Matthew Deffinger has 8 years of professional experience. They have held roles including Software Developer at companies such as BSI Engineering. Their education includes bachelor of science in cyber security from University of Cincinnati.

Is Matthew Deffinger's contact information up to date?

Yes. Matthew Deffinger's SignalHire profile was last updated on 3 July 2026, reflecting their current position as Security Researcher at Margin Research.

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