Company Details
Technology Stack
Professional Summary
John Iersel is CIO Enterprise Application Services at nn-group.com. nn-group.com operates in the financial services industry and has 2600 employees. Classified as a c-suite-level CIO leader. Their organization's technology stack includes Akamai, Salesforce, Akamai DNS, Mailchimp Mandrill, Outlook, and 21 other technologies. nn-group.com reports annual revenue of 464290000.
Industry & Role Insights
- • CTO Rank tracks 16,373 CIO leaders with verified contact information.
- • There are 34,741 tech leaders in the financial services industry in our database.
- • We have verified contacts for 10 tech leaders at nn-group.com.
Position in the CTO Rank Database
- • John Iersel is 1 of 16,634 leaders with the CIO role tracked in the CTO Rank database.
- • 1,489 hold the CIO role at financial services companies (out of 34,954 total financial services leaders in our database).
- • 97 hold the CIO role at companies with 2600 employees.
Data sourced from 484,726 tech leadership profiles. Updated May 2026.
Frequently Asked Questions
How do I contact John Iersel?
John Iersel has a verified email address on file on CTO Rank. They work at nn-group.com. Pro members can access direct email addresses, LinkedIn profiles, and phone numbers.
What company does John Iersel work for?
John Iersel is CIO Enterprise Application Services at nn-group.com, a company in the financial services industry with 2600 employees. The company is headquartered in Den Haag, Zuid-Holland, Netherlands.
What is John Iersel's role in technology leadership?
John Iersel is classified as a CIO leader at the c-suite level.
What technologies does John Iersel's organization use?
John Iersel's organization uses a technology stack that includes Akamai, Salesforce, Akamai DNS, Mailchimp Mandrill, Outlook, React Redux. This information is useful for sales teams, recruiters, and technology vendors.
Is John Iersel open to recruiting or new opportunities?
CTO Rank does not track open-to-work status. The best approach is to reach out directly to John Iersel using the verified contact information available to Pro members. When recruiting a CIO Enterprise Application Services, personalizing your outreach with specifics about the role and tech stack typically yields the best response rate.
Can I pitch or sell to John Iersel at nn-group.com?
John Iersel is CIO Enterprise Application Services at nn-group.com. CIOs like John Iersel typically evaluate vendors in Akamai, Salesforce, Akamai DNS, and related categories. Use CTO Rank Pro to get verified email and approach directly.
How accurate is John Iersel's profile data?
CTO Rank verifies and refreshes profile data weekly. John Iersel's profile includes verified contact details, company information, and technology stack data sourced from multiple public and proprietary sources.
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