Mark Costello: Email & Phone Number

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Global Managing Director at Dentons|New York City Metropolitan Area, United States

Position:

Global Managing Director at Dentons

Location:

New York City Metropolitan Area, United States

View Mark Costello's Email

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Last updated: 2026-06-22

Updated: 2026-06-22

Found email addresses for Mark Costello:

Business emails:

m***********o@uk.ey.com

Personal emails:

m**********8@gmail.com,

c****r@yahoo.com,

j****c@aol.com

Found phones for Mark Costello:

+1-323-***-**92,

+1-870-***-**60,

+1-205-***-**57

A different Mark Costello?

Work Experience 37 years

Global Managing Director at Dentons

Sep 2025 - Current

Partner at CrossCountry Consulting

Sep 2023 - Mar 2025

Senior Partner and Market Sector Leader - Industrial Manufacturing and Mobility at EY

Jan 2018 - Jun 2021

Senior Partner - Global Accounts - EY at EY

Jan 2012 - Jun 2021

Global Real Estate Advisory Leader at EY

Jan 1998 - Jan 2012

Senior Vice President at CBRE

Jan 1997 - Jan 1998

Regional Vice President at Louis Dreyfus Company

Jan 1989 - Jan 1997

Mark Costello started working in 1989, then the employee has changed 4 companies and 6 jobs. On average, Mark Costello works for one company for 5 years 5 months.

Mark holds Member, Connecticut State Bar, Member, New York State Bar, and Licensed Real Estate Broker certifications.

Education

Doctor of Law - JD at New York Law School

Master of Arts - MA at New York University

Bachelor of Arts - BA at State University of New York

Frequently Asked Questions

What is Mark Costello's email address?

SignalHire found verified email addresses for Mark Costello, both business and personal. Their business email is m***********o@uk.ey.com, and personal emails include m**********8@gmail.com, c****r@yahoo.com, and j****c@aol.com.

What is Mark Costello's phone number?

SignalHire found multiple verified phone numbers for Mark Costello: +1-323-***-**92, +1-870-***-**60, and +1-205-***-**57.

How do I contact Mark Costello at Dentons?

You can reach Mark Costello 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 Mark Costello's professional background?

Mark Costello has 37 years of professional experience. They have held roles including Partner, Senior Partner and Market Sector Leader - Industrial Manufacturing and Mobility, and Senior Partner - Global Accounts - EY at companies such as CrossCountry Consulting, EY, and EY. Their education includes Doctor of Law - JD from New York Law School, and Master of Arts - MA from New York University.

Is Mark Costello's contact information up to date?

Yes. Mark Costello's SignalHire profile was last updated on 22 June 2026, reflecting their current position as Global Managing Director at Dentons in Worldwide, United Kingdom.

Mark Costello Namesakes

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Company

Position

Mark Costello

Florida Power & Light

Real Time Power Trader

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Mark Costello

Conrad Siegel

Retirement Assistant

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Mark Costello

INTEGRAL CONTRACTING, INC

Owner

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