John Clark

John Clark serves as President/CEO at The Whitestone Group. The Whitestone Group operates in the security & investigations sector with approximately 180.0 employees. The company is headquartered in Columbus, Ohio. The Whitestone Group generates annual revenue of 74283000.0.

Industry & Role Insights

• • MessageCEO tracks 844 executives in the security & investigations sector.
• • 1,885 executive contacts are available in Ohio.
• • Our database includes 201,469 c suite-level executives.

Cloudflare DNS Outlook Microsoft Office 365 Google Font API Mobile Friendly WordPress.org Bootstrap Framework Google Maps Google Tag Manager Splunk Domo Sisense KNIME AI

armed security guards unarmed security guards armed security guards & unarmed security guards private security government services asset protection vulnerability assessment security training protective services corporate security strategic services personal protective services electronic security monitoring armed security unarmed security rapid response tactical training crisis management dignitary protection global threat assessment anti-terrorism force protection security logistics facility management protective intelligence security analysis emergency service teams security escorts mobile command centers risk assessment investigations background checks computer fraud detection employee investigations executive protection event security security audits asset recovery crime prevention military personnel security contracts professional security services special operations personal security details environmental design security cpted training seminars first aid training cpr training surveillance counterterrorism training security assessments government contracts

JF

Jose Francisco Co-CEO at 2045 - Empresa de Segurança, S.A.

MP

Miguel Pinho Co-CEO at 2045 - Empresa de Segurança, S.A.

JN

Johan Nykvist CEO at 2Secure AB

JC

Jamie Catania CEO & Practice Lead, Collision Reconstruction at '-30- Forensic Engineering

BB

Bill Benson CEO at 360 Advanced Security Corporation

Outreach Guidance — security & investigations Sector

Executives like John Clark in the security & investigations sector receive targeted outreach from sales teams, recruiters, and investors. To stand out, personalize your message with industry-specific context and a clear, specific value proposition relevant to their role at The Whitestone Group.

John Clark's Position in the MessageCEO Database

• •John Clark is 1 of 1 verified executive contact we track at The Whitestone Group.
• •828 verified executive contacts in security & investigations are in the MessageCEO database.
• •1,794 verified executive contacts in Ohio are in the database.
• •17 verified contacts work at security & investigations companies in the 180.0 employee range (same size as The Whitestone Group).

Executive contact data compiled from public business filings, LinkedIn public profiles, company press materials, and verified outbound email testing. We do not publish personal addresses or sensitive identifiers. Methodology & sources · Removal requests handled at /remove-info · Updated June 2026.

How do I reach John Clark directly?

John Clark's verified email address is available to MessageCEO Pro subscribers. They currently serve as President/CEO at The Whitestone Group. Access direct contact info to skip gatekeepers and reach the decision maker.

What company does John Clark work for?

John Clark is President/CEO at The Whitestone Group, a company in the security & investigations sector with 180.0 employees. The company is based in Columbus, Ohio.

Can I pitch or sell to John Clark?

As President/CEO at The Whitestone Group, John Clark is a key decision-maker in the security & investigations sector. MessageCEO Pro gives you verified email to reach John Clark directly — ideal for B2B sales, partnerships, and executive recruiting.

What industry is John Clark in?

John Clark works in the security & investigations industry as President/CEO at The Whitestone Group. MessageCEO provides verified contact information for executives across all major industries.

Is John Clark's contact information verified?

Yes. MessageCEO verifies executive contact information through multiple data sources and regular validation checks. John Clark's profile is kept up-to-date with the latest available information.

Last updated: June 22, 2026