Jeffrey Ellis

Jeffrey Ellis serves as Chief Executive Officer at Seneca Holdings, LLC. Seneca Holdings, LLC operates in the information technology & services sector with approximately 22.0 employees. The company is headquartered in Chicago, Illinois.

Industry & Role Insights

• • MessageCEO tracks 50,503 executives in the information technology & services sector.
• • 3,772 executive contacts are available in Illinois.
• • Our database includes 201,469 c suite-level executives.

Cloudflare DNS Microsoft Office 365 CloudFlare Hosting Google Tag Manager DotNetNuke Google Plus Linkedin Widget Linkedin Login Panopto Flowplayer

it mission support services it management & solutions contract staffing workforce management training solutions program planning & management integrated product services environmental safety energy sustainability cyber security administrative & operations support cloud services healthcare administration program management office it services & it consulting public health health consulting epidemiology community health health equity social determinants of health covid-19 response indigenous health health assessments emergency preparedness community planning health & safety stem education capacity building global health urban planning mental health awareness training programs disparity interventions health advocacy cultural competency health statistics environmental health health outreach data analysis evidence-based practices non-profit consulting workforce development health improvement toxicology studies community engagement diplomatic communication policy formulation partnership building research collaboration health disparities educational resources multicultural health patient navigation covid-19 prevention intergenerational trauma historical trauma assessment services community development tribal health initiatives grant writing indigenous emergency operations public health education professional training consultation services environmental services renewables & environment computer & network security information technology & services cloud computing enterprise software enterprises computer software b2b health wellness & fitness data analytics writing & editing

MJ

Marvin Jo CTO at 위블링

RK

Robert Kim CEO, North America at 당근마켓

KL

Kyung Lim CTO at 인터파크

AR

Alex Ryu Chief Operating Officer, Supply Chain Solutions Group at 동양시스템즈(주)

WK

Wonho Kang 라포테이블(팔도감) | CEO · Product Lead at 라포랩스(퀸잇)

Outreach Guidance — information technology & services Sector

Technology executives make decisions on infrastructure, tooling, and partnerships. When reaching out to Jeffrey Ellis, lead with your value proposition relative to the stack they currently use. Generic pitches perform poorly; specific technical relevance is key.

Jeffrey Ellis's Position in the MessageCEO Database

• •49,754 verified executive contacts in information technology & services are in the MessageCEO database.
• •3,510 verified executive contacts in Illinois are in the database.
• •846 verified contacts work at information technology & services companies in the 22.0 employee range (same size as Seneca Holdings, LLC).

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 July 2026.

How do I reach Jeffrey Ellis directly?

Jeffrey Ellis's verified email address is available to MessageCEO Pro subscribers. They currently serve as Chief Executive Officer at Seneca Holdings, LLC. Access direct contact info to skip gatekeepers and reach the decision maker.

What company does Jeffrey Ellis work for?

Jeffrey Ellis is Chief Executive Officer at Seneca Holdings, LLC, a company in the information technology & services sector with 22.0 employees. The company is based in Chicago, Illinois.

Can I pitch or sell to Jeffrey Ellis?

As Chief Executive Officer at Seneca Holdings, LLC, Jeffrey Ellis is a key decision-maker in the information technology & services sector. MessageCEO Pro gives you verified email to reach Jeffrey Ellis directly — ideal for B2B sales, partnerships, and executive recruiting.

What industry is Jeffrey Ellis in?

Jeffrey Ellis works in the information technology & services industry as Chief Executive Officer at Seneca Holdings, LLC. MessageCEO provides verified contact information for executives across all major industries.

Is Jeffrey Ellis's contact information verified?

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

Last updated: July 17, 2026