President And Technical Instructor
CurrentFounded in 1996. Provides Live Hands-On technical training for the IBM i (iSeries and AS/400).Classes are Live Online and On-Site at customer offices.
Jan 1996 - Present
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Dan Riehl Email & Phone Number
President and Instructor - The 400 School, Inc. ||President & Security Specialist - IT Security & Compliance Group
at
The 400 School, Inc.
1 work email found
@400school.com
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✓ Verified Jun 2026
4 data sources
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Current company
Role
President and Instructor - The 400 School, Inc. ||President & Security Specialist - IT Security & Compliance Group
Location
Chesterfield, Missouri, United States
Who is Dan Riehl? Overview
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Quick answer
Dan Riehl is listed as President and Instructor - The 400 School, Inc. ||President & Security Specialist - IT Security & Compliance Group at The 400 School, Inc., based in Chesterfield, Missouri, United States. AeroLeads shows a work email signal at 400school.com and a matched LinkedIn profile for Dan Riehl.
Dan Riehl previously worked as President and Technical Instructor at The 400 School, Inc. and President & Security Specialist at It Security And Compliance Group, Llc. Dan Riehl holds Associate Applied Science, Business Data Processing from St Louis Community College.
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Email format at The 400 School, Inc.
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{first}.{last}@400school.com
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Profile bio
About Dan Riehl
I truly enjoy working in the specialty area of security for IBM i iSeries AS/400. Working with my clients to help solve their security and compliance issues is very rewarding for me.I also spend a lot of time teaching LIVE classes in Security, System Administration, Operations, and RPG IV, COBOL and CL programming. I enjoy teaching people how to do new things. It's great when you can see that they really understand the material. In May 2010 I began teaching LIVE Hands-On classes over the Web. These include Security Workshops, RPG IV and CL Programming Workshops and IBM i Operations and Administration Workshops.Most of these classes are open to the public, some are private classes for companies located around the world.If you are curious, you can see what I do by going to www.SecureMyi.com and to www.400School.com .Specialties: IBM i (AS/400) Security, Vulnerability Assessments, Systems programming, IT Technical Training.
Listed skills include Ibm Iseries, Security, System Administration, Operating Systems, and 34 others.
Current workplace
Dan Riehl's current company
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The 400 School, Inc.
Website
AeroLeads page
10 roles
Dan Riehl work experience
A career timeline built from the work history available for this profile.
President & Security Specialist
Current
It Security And Compliance Group, Llc
Providing expert audit and security services for the IBM AS/400, iSeries and System i. Security training is available to teach the IT staff how to implemeny security, and for the IT auditing staff to teach them HOW TO audit the AS/400, iSeries and IBM System i.
Feb 2009 - Present
Senior Technical Editor And Author
System Inews Magazine
Write and Edit technical articles related to the IBM AS/400 (iSeries, System i)
Oct 1988 - Jan 2012
It Audit And Security Specialist
Powertech
Provide Expert Security Services and Training for the IBM AS/400, iSeries, System i.
Apr 1996 - Feb 2009
Founder And President
Powertech
Founded the AS/400 Training and Consulting company. Moved from 1 employee to over 20. Profitable from Day 1. Powertech was acquired by Help/Systems in late 2008. I left shortly thereafter.
Jan 1996 - Sep 2001
Technical Editor And Author
Ibm As/400 Magazine
Write and edit technical articles related to the IBM AS/400 (iSeries, System i).
Jan 2002 - Aug 2004
Founder And President
Total Computer Solutions, Inc.
Formed AS/400 consulting company. Profitable from day 1. Maximum of 4 employees. After 18 months, the company was sold to Technology Management Group.
Apr 1992 - Aug 1993
As/400 Consultant
Business Applications, Inc
Consultant for IBM Business partner firm. Specialized in converting from System/38 to AS/400. COBOL and RPG III programming. AS/400 System administration and training.
May 1988 - Apr 1992
Application Development Manager
Application Programmer and Application Development Manager for Conagra Processed Meat Corp in Omaha, NE.
Apr 1985 - May 1988
Computer Programmer
Convert Accounting applications from IBM 360 card system to IBM System/38. COBOL and BASIC programming.
Apr 1983 - Apr 1985
2 education records
Dan Riehl education
Associate Applied Science, Business Data Processing
St Louis Community College
Education record
Parkway Central High School
FAQ
Frequently asked questions about Dan Riehl
Quick answers generated from the profile data available on this page.
What company does Dan Riehl work for?
Dan Riehl works for The 400 School, Inc..
What is Dan Riehl's role at The 400 School, Inc.?
Dan Riehl is listed as President and Instructor - The 400 School, Inc. ||President & Security Specialist - IT Security & Compliance Group at The 400 School, Inc..
What is Dan Riehl's email address?
AeroLeads has found 1 work email signal at @400school.com for Dan Riehl at The 400 School, Inc..
Where is Dan Riehl based?
Dan Riehl is based in Chesterfield, Missouri, United States while working with The 400 School, Inc..
What companies has Dan Riehl worked for?
Dan Riehl has worked for The 400 School, Inc., It Security And Compliance Group, Llc, System Inews Magazine, Powertech, and Ibm As/400 Magazine.
How can I contact Dan Riehl?
You can use AeroLeads to view verified contact signals for Dan Riehl at The 400 School, Inc., including work email, phone, and LinkedIn data when available.
What schools did Dan Riehl attend?
Dan Riehl holds Associate Applied Science, Business Data Processing from St Louis Community College.
What skills is Dan Riehl known for?
Dan Riehl is listed with skills including Ibm Iseries, Security, System Administration, Operating Systems, Rpg, Os/400, Software Development, and Ibm As/400.
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