John Kostakos
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John Kostakos Email & Phone Number

Customer Success Advisor at Illumio at Illumio
Location: Fanwood, New Jersey, United States 6 work roles 1 school
1 work email found @illumio.com LinkedIn matched
✓ Verified May 2026 4 data sources Profile completeness 100%

Contact Signals · 1 work email

Work email j****@illumio.com
LinkedIn Profile matched
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Current company
Role
Customer Success Advisor at Illumio
Location
Fanwood, New Jersey, United States
Company size

Who is John Kostakos? Overview

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Quick answer

John Kostakos is listed as Customer Success Advisor at Illumio at Illumio, a company with 353 employees, based in Fanwood, New Jersey, United States. AeroLeads shows a work email signal at illumio.com and a matched LinkedIn profile for John Kostakos.

John Kostakos previously worked as Customer Success Advisor at Illumio and Customer Success Manager at Zscaler. John Kostakos holds Bsee from Fairleigh Dickinson University.

Company email context

Email format at Illumio

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{first}.{last}@illumio.com
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AeroLeads found 1 current-domain work email signal for John Kostakos. Compare company email patterns before reaching out.

Profile bio

About John Kostakos

Professional Summary: Extensive experience in Executive Management & Engineering for Networking, Distributed systems and Applications. Financial Services IT experience including Cisco and as a Senior IT Executive at two Major US Financial Institutions managing a staff 120+. NYC Branch Manager for an IT consulting firm with staff of 100+. Systems designer and QA/test engineer for a defense contractor. Senior Engineer/Technical lead for a DoD contractor.US patent holder in the field of Financial Network Architecture.Proven capabilities of relationship development with senior management, managing teams and staff. Manager/VP of Global Network Engineering and Architecture for two Major NYC Financial firms, which included the budgeting process, staffing of 120 plus, vendor management and all major projects globally. Cisco Senior Support Manager / Customer Success Manager for JPMC/Goldman Sachs/Deutsche Bank and others. Management of Cisco & Customer efforts towards joint success. This has included the guidance of Cisco Teams and Customer teams to successful achievement of joint goals. Successful development of custom metrics and use of standard metrics to guide process improvements in both Cisco's and the Customer's environments. Involved in early adopter UC, Networking & Security deployments in several major Financial Customer networks.

Listed skills include Patent Holder, Ip, Patents, Managed Services, and 19 others.

Current workplace

John Kostakos's current company

Company context helps verify the profile and gives searchers a useful next step.

Illumio
Illumio
Customer Success Advisor at Illumio
sunnyvale, california, united states
Website
Employees
353
AeroLeads page
6 roles · 33 years

John Kostakos work experience

A career timeline built from the work history available for this profile.

Customer Success Advisor

Current
Jun 2021 - Present

Customer Success Manager

NYC

Apr 2019 - Jul 2020

Senior Support / Customer Success Manager

New York City

Support of Major Global Financial Firms

Aug 1999 - Dec 2018

Branch Manager

Manhattan

Branch Manager for IT Consulting Firm.

1997 - 1999 ~2 yrs

Vp Network Architecture

New York City

VP of Global Network Architecture

1993 - 1997 ~4 yrs

Avp

New York City

AVP Manager of Networking

Feb 1991 - Apr 1993
Team & coworkers

Colleagues at Illumio

Other employees you can reach at illumio.com. View company contacts for 353 employees →

1 education record

John Kostakos education

FAQ

Frequently asked questions about John Kostakos

Quick answers generated from the profile data available on this page.

What company does John Kostakos work for?

John Kostakos works for Illumio.

What is John Kostakos's role at Illumio?

John Kostakos is listed as Customer Success Advisor at Illumio at Illumio.

What is John Kostakos's email address?

AeroLeads has found 1 work email signal at @illumio.com for John Kostakos at Illumio.

Where is John Kostakos based?

John Kostakos is based in Fanwood, New Jersey, United States while working with Illumio.

What companies has John Kostakos worked for?

John Kostakos has worked for Illumio, Zscaler, Cisco, Xerox Connect, and Merrill Lynch.

Who are John Kostakos's colleagues at Illumio?

John Kostakos's colleagues at Illumio include John Esterline, Ray P., Almudena Arranz De Diego, Dan Farmer, and Edward D..

How can I contact John Kostakos?

You can use AeroLeads to view verified contact signals for John Kostakos at Illumio, including work email, phone, and LinkedIn data when available.

What schools did John Kostakos attend?

John Kostakos holds Bsee from Fairleigh Dickinson University.

What skills is John Kostakos known for?

John Kostakos is listed with skills including Patent Holder, Ip, Patents, Managed Services, Vendor Management, Start Ups, Data Center, and Wan Optimisation.

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