Simon Maas

Simon Maas serves as Chief Operating Officer at CertifyOS. CertifyOS operates in the hospital & health care sector with approximately 260.0 employees. The company is headquartered in Los Angeles, California. CertifyOS generates annual revenue of 1000000.0. To date, CertifyOS has raised 19050000.0 in total funding, with the most recent round being Series A.

Industry & Role Insights

• • MessageCEO tracks 6,447 executives in the hospital & health care sector.
• • 13,743 executive contacts are available in California.
• • Our database includes 201,469 c suite-level executives.

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Donna Rey Executive Director & CEO at 1199SEIU National Benefit Fund

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Amin Shivji Chief Executive Officer at 123Dentist

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Jeff Leger Chief Executive Officer (incoming) at 123Dentist

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Chandan Advani Co - Chief Executive Officer at 123Dentist

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Stuart Tait Chief Executive Officer at 13SICK National Home Doctor

Outreach Guidance — hospital & health care Sector

Executives like Simon Maas in the hospital & health care 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 CertifyOS.

Simon Maas's Position in the MessageCEO Database

• •Simon Maas is 1 of 1 verified executive contact we track at CertifyOS.
• •6,187 verified executive contacts in hospital & health care are in the MessageCEO database.
• •12,901 verified executive contacts in California are in the database.
• •59 verified contacts work at hospital & health care companies in the 260.0 employee range (same size as CertifyOS).

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 We do not publish personal addresses or sensitive identifiers.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 Simon Maas directly?

Simon Maas's verified email address is available to MessageCEO Pro subscribers. They currently serve as Chief Operating Officer at CertifyOS. Access direct contact info to skip gatekeepers and reach the decision maker.

What company does Simon Maas work for?

Simon Maas is Chief Operating Officer at CertifyOS, a company in the hospital & health care sector with 260.0 employees. The company is based in Los Angeles, California.

Can I pitch or sell to Simon Maas?

As Chief Operating Officer at CertifyOS, Simon Maas is a key decision-maker in the hospital & health care sector. MessageCEO Pro gives you verified email to reach Simon Maas directly — ideal for B2B sales, partnerships, and executive recruiting.

What industry is Simon Maas in?

Simon Maas works in the hospital & health care industry as Chief Operating Officer at CertifyOS. MessageCEO provides verified contact information for executives across all major industries.

Is Simon Maas's contact information verified?

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

Last updated: June 30, 2026