Enterprise technology and transformation executive with 20+ years of experience leading large‑scale, mission‑critical modernization across Fortune 100 enterprises and U.S. federal agencies, aligning technology investments with business and mission strategy to deliver measurable growth, operational efficiency, and risk reduction in highly regulated environments.

CIYIS was founded in 2013 by Christian Y. Sellu doing work primarily in the private sector. Within CIYIS, Christian is focused on maintaining relationships with clients, large & small system integrators, staffing firms, and software OEM vendors in the industry as well as providing leadership in prototyping, R&D, and building innovative solutions for clients utilizing emerging technologies.

Christian is a technology and business transformation executive who drives large‑scale modernization, aligns technology investment with business strategy, and delivers measurable growth, efficiency, and risk reduction across Fortune 100 and public‑sector organizations.

He has 20+ years of experience leading complex, mission critical modernization initiatives across Fortune 100 enterprises and U.S. federal agencies in highly regulated environments.

He is a proven C suite advisor to CIOs, CTOs, CFOs, and senior business leaders, aligning multi-year technology strategy with enterprise objectives to deliver measurable improvements in operational efficiency, scalability, risk reduction, and cost optimization.

His industry experience spans multiple industries including Pharmaceuticals, Manufacturing, Consumer Products, Food & Beverage, Global Retail, and Apparel & Footwear.

He has demonstrated success leading large scale global programs and portfolios with budgets ranging from $1.5M to over $100M. He has managed distributed teams of up to 100+ resources across clients, system integrators, and software vendors.

Deep expertise in ERP and enterprise application modernization, including SAP S/4HANA Greenfield and Brownfield transformations, Clean Core adoption, SAP BTP extensions, and enterprise IT sustainment models.

He is also a strategic leader in cloud and data platform modernization, designing secure, scalable architectures across cloud hyperscalers such as AWS and Azure while enabling data driven operating models leveraging SAP’s portfolio of solutions (SAP BTP, S/4HANA, SAP Business Data Cloud) and Snowflake.

Christian has extensive experience driving digital transformation at scale including developing enterprise architecture, business process reengineering, system integration, DevSecOps, Zero Trust Architecture, and Agile / SAFe delivery models.

Trusted executive for establishing enterprise governance models, including executive steering committees, KPI/SLA frameworks, risk management, and compliance mechanisms that ensure transparency, accountability, and value realization.

Recognized for ability to balance innovation with operational and regulatory risk, delivering solutions aligned with NIST, RMF, FedRAMP, DoDAF, and other federal and enterprise compliance frameworks.

He is an accomplished leader in pre-sales strategy and deal execution, including solution design, estimation, and oral defense for multi-year transformation programs ranging from $2M to $200M, resulting in significant new revenue and long term client partnerships.

Visionary people leader with a track record of building, mentoring, and scaling high performing teams, cultivating executive ready talent and fostering a culture of accountability, excellence, and continuous improvement.

Exceptional executive communicator with the presence and credibility to influence outcomes at the board, C suite, and senior stakeholder levels, translating complex technical concepts into clear business value narratives.

Results oriented, collaborative leader known for driving speed to market, operational resilience, and sustainable business outcomes, while maintaining strong executive relationships across clients, partners, and government stakeholders.

Prior to CIYIS, Christian worked as a consultant in the Big 4 and with various system integrators within the ERP and Enterprise Data Warehousing (EDW) industries.

Christian has worked across multiple industries in the public and private sectors and has received recognition from leadership within 1) the US Army, 2) the Centers for Disease Control & Prevention, and 3) the Department of Navy for exemplary support in support of mission critical public and private sector ERP programs.

Christian has a Bachelor of Business Administration from Goizueta Business School – Emory University with a concentration in Consulting & Venture Management.