John: Email & Phone Number

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Semi - Retired at SENTINEL SYSTEMS, LLC|Golden, Colorado, United States

Position:

Semi - Retired at SENTINEL SYSTEMS, LLC

Location:

Golden, Colorado, United States

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Last updated: 2026-07-21

Updated: 2026-07-21

Found email addresses for John:

Business emails:

j***_@sentinelsystems.net

Personal emails:

****@hotmail.com,

j***@sentinelsystems.com,

****@gmail.com,

****@echostar.com

Found phones for John:

+1-520-***-**52,

+1-323-***-**59

A different John?

Work Experience 33 years

Semi - Retired at SENTINEL SYSTEMS, LLC

Jul 2023 - Current

Software Developer at Sentinel Systems, Corp.

Nov 2014 - Current

Engineer III - Software Test at EchoStar Corporation

Jul 2014 - Nov 2014

Software Engineer at McKesson

Aug 2010 - Apr 2014

Software Developer - Contractor Position at First Bank Data Corporation

Aug 2008 - Jul 2009

Software Developer at Sentinel Systems

Sep 2000 - Aug 2008

Computer Telephony Programmer at Telistic, Inc.

Jan 1997 - Jan 2000

Postview Technical Analyst at Global Crossing

Jan 1996 - Jan 1997

Software / Hardware Testing Manager at Frontier, ConferTech International

Jan 1993 - Jan 1997

John started working in 1993, then the employee has changed 8 companies and 7 jobs. On average, John works for one company for 4 years.

Their professional focus is .NET, Agile Methodologies, and ASP.NET across 3 core areas.

Education

New Horizons Learning Center

University of Northwestern – St. Paul

Regis University

Frequently Asked Questions

What is John's email address?

SignalHire found verified email addresses for John, both business and personal. Their business email is j***_@sentinelsystems.net, and personal emails include ****@hotmail.com, j***@sentinelsystems.com, and ****@gmail.com.

What is John's phone number?

SignalHire found multiple verified phone numbers for John: +1-520-***-**52, and +1-323-***-**59.

How do I contact John at SENTINEL SYSTEMS, LLC?

You can reach John 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 John's professional background?

John has 33 years of professional experience. They have held roles including Software Developer, Engineer III - Software Test, and Software Engineer at companies such as Sentinel Systems, Corp., EchoStar Corporation, and McKesson. Their education includes New Horizons Learning Center, and University of Northwestern – St. Paul.

Is John's contact information up to date?

Yes. John's SignalHire profile was last updated on 21 July 2026, reflecting their current position as Semi - Retired at SENTINEL SYSTEMS, LLC in SALT LAKE CITY, Utah, United States.

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