Maria Siska
About
Detail
Director, CTO Delivery Operations
Marousi, Greece
Résumé
Jobs
verified_user
0% verified
Director, CTO Delivery OperationsOmiliaJun 2026 - Current (4 months)Building the operating model behind delivery across the CTO org | Influence over authority, transparency over control- Director of Operations TransformationOmiliaApr 2024 - Current (2 years 6 months)Leading a portfolio of cross-functional transformation initiatives, spanning process redesign, tooling, and organizational change, to close operational gaps and improve how the company executes at scale.
- Head of PreSales OperationsOmiliaMar 2020 - Apr 2024 (4 years 2 months)- Designed and executed a strategic 3-year plan to implement key processes and policies for the PreSales function, aligned with business vision and strategy.
- Led experienced PreSales consultants, serving as internal Subject Matter Expert on commercial operations and opportunity lifecycle.
- Ensured coherence and alignment across all commercial units.
- Owned end-to-end bid management including RFP responses and bid governance. - Fixed & Mobile Convergence Program ManagerVodafoneJun 2015 - Apr 2016 (11 months)- Overall program management for all IT streams in the context of the Vodafone/HOL convergence.
- Responsible for guiding business and technical stakeholders through organizational restructuring into one unified company.
- Managed budget planning, resource allocation, and vendor relationships in line with set strategy, objectives, and standards. - IT Solution Delivery Team Leader / Senior Project ManagerVodafoneNov 2008 - Jun 2015 (6 years 8 months)- Managed IT internal customer requests and complex cross-functional projects and programmes, with a focus on Customer Services.
- Oversaw Vodafone's relationship with outsourced partners and vendors, building effective collaboration models across internal technology units, ADM partners, and global service providers.
- Led team transformation through a major IT organizational restructuring from an Operations/Demand to an Operations/Delivery operating model.
- Monitored vendor relationships and service delivery against set strategy, objectives, and standards. - IT Account & Demand ManagerVodafoneApr 2004 - Oct 2008 (4 years 7 months)- Managed demand for business requests addressed to the IT function, coordinating activities based on project objectives.
- Conducted cost/benefit and technical analysis in line with the Change Management process.
- Negotiated and agreed planned activity and delivery calendars with the Operating Company.
- Managed local resources within Global IT Programmes, following corporate project management methodology.
Education
verified_user
0% verified
- Master of Science - MS, Information Technology: Business Information SystemsKeele UniversityJan 1999 - Jan 2000 (1 year 1 month)
- Bachelor of Science (BSc, MathematicsUniversity of East AngliaJan 1994 - Jan 1998 (4 years 1 month)