BCA College (BCA)
College Lecturer
BI & Analytics post-graduate course
Lefteris Mantelas
Data professional with focus on decision making and performance improvement
Chalandri, Greece (+02:00 UTC) English, Greekfrom Chalandri, Greece
Usually responds in 20 hours
$60 / hour
Price per hour
30 min
Time Blocks Available
5.00
4 reviews / 5 sessions
Tue
27
Next availability
Bio
****** If you're an individual looking for career advice, or a super early start-up, DM me and we can bypass rate ****** 10+ years improving business performance and enabling intelligent business decisions at a strategic and a tactical level, using data and data analytics. Worked on various business models, industries, and domains such as SaaS and PaaS, retail and FMCG, banking and shipping, Energy, Gas, and Utilities, urban and regional planning. Familiar with a range of business problems, different business, and technological maturity stages, as well as various stacks, data sources, and technical infrastructures. Experienced in building and running teams, including remotely in different time-zones, leading, coaching, and helping people grow, project management, R&D projects, consulting, as well as working with clients such as Google, Coca-Cola, P&G, Hess, and E.ON. Motivated to work with fascinating people on interesting problems, be an agent of growth, and an advocate of data-smart culture.
Expertise
Building a team
During my career I have built the data function from scratch in 3 different tech companies. Each case had it own specifics: SaaS and PaaS, office based and remote, same country and multiple time zones
Data science
I have been working with data one way or another during the last 15 years. I call my self a data professional but I always focus on the decision making and how data can help stakeholders or systems to make the right decision. Sometimes just getting the data straight is good enough (not that it is easy) and most of the times a pivot table with the right data would do the trick. Not all the times though :)
Product analytics
How the product is being used? What are the different user segments? How are these different when it comes to loyalty, monetisation and overall value? Which ones are the price sensitive? Some of the questions that I or my team as been dealing with in the past 10 years or so
Remote work
Remote work is ... not for everyone. Actually, not everyone is up for remote. I have been leading a team of 18 people in different time zones and I have hit several walls of the remote working setup to know a thing or two...
Toolkit
Looker Studio (Google Data Studio)
I have been using Google Data Studio - and Google cloud more broadly the last 5 years and have set the full reporting infrastructure in 2 different companies
MySQL
well... I have been using SQL - in various permutations - for almost 20 years (ouch)... I have worked with perfect 10s in SQL so I know that I am not a 10 but I have hit almost all the walls there is to hit
Industries
Information Technology
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Analytics
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Experience
MYOB Data
Principal consultant & FounderStarting my own consulting gig... The idea is to use my experience to help companies devise the proper data strategy and pick the right data projects to inform decisions, improve product & pricing, improve performance and help their data teams grow.
Business Intelligence and Analytics Athens
Organizer of Business Intelligence & Analytics Athens MeetupThis is a community based group with more than 1800 registered professionals and practitioners in the Business Intelligence and Data Analytics arena as well as data analytics enthusiasts and students of related disciplines.
I joined Hotjar right after the acquisition by Contentsquare to level up the BI, Data Engineering and Data Science functions, managing remotely a team that peaked at 18 members.
GWI
Head Of Business IntelligenceDuring the initial interview for a Data Science position in GWI, I identified a gap and I pitched the vision for the Business Intelligence team and the value that it could bring to the company. I then joined GWI as the first hire in the newly established Greek office in Athens (well, 2nd hire as the first was the recruiter). I worked on building the whole (dream) team and infrastructure from scratch and focused heavily on commercial data architecture and data governance to ensure we all speak the same (data) language. Particularly proud of the team we assembled and the domains we cover within the company globally, as well as the range of services we provided to the UK and US offices. I was heavily engaged in growing the Greek office, especially in the early days, and occasionally worked on internal side projects like the TV-RF solution and usage reporting for "big" clients.
BEAT - previously Taxibeat - acquired by FreeNow
Business Intelligence & Analytics HeadBuilt & ran a team of 5 analysts to enable intelligent business decision-making for growth, lifecycle, marketing & CRM, pricing, finance, product and CX
Beat
Business Intelligence & Analytics Lead- Collaboration with Big Data and Data Science teams to define, build, QA and maintain (near) live analytical records in Presto - BI tools evaluation - Participation in defining main KPIs - Develop Tableau dashboards - Contribution in automating and/or simplifying (legacy) manual reports - Attribution model and multi-cohort funnel design for drivers and passengers - CRM and customer lifecycle analytics including: * Drivers' and Passengers' segmentation and profiling * Definition of different customer statuses and touch points * Short term traffic forecasting * Suggestion of appropriate incentives to improve acquisition, onboarding and retention and decrease churn - Application of data mining techniques to identify commuting patterns - Experimented on ways to harness geographical data and spatial analytics
B2C
- Establishment of a functional schema upon the single point of truth for all own and 3rd party data sources (12 different data sources in Amazon Redshift) - Population and maintenance of a number of reports on practically all business aspects including: * SaaS performance metrics * Marketing and campaign evaluation * Anti-fraud * Product/feature usage and feature stickiness * Operations and support performance * Customer Single View - Detailed demographic and behavioural customer profile compared against cohort and peers and enriched with analytics including among others sentiment analysis of recent coms - Participation in attribution model definition for more than one products and funnel design - Participation in comprehending customer touch points and leveraging UX related operations such as drip mails and Next Best Action - Applied various models to assess customer onboarding, customer health and churn - Lead score / grade models, estimation of probability to convert (score) and probability to convert to a "good" customer (grade) at the moment of signup using 7 different data sources that achieved a lift figure ~70 - Short term traffic forecasting - Participation in design and implementation of customers' custom reporting as a new product - Established technical partnership with Tableau - Designed plug 'n play Tableau dashboards for customers - Evaluated different pricing scenarios that assisted in the succesful negotiations with involved parties - Populated benchmarks for hiring KPIs across areas and functions that fuelled an online tool available on the marketing site of Workable - Feature design as input for Data Science anti-fraud project - Beta testing Amazon Quicksight BI tool and participation in testing Blendo ETL tool
B2BSaaS
EY Data Analytics Center of Excellence (CoE - CSE)
Senior Advisor- Participation in enterprise intelligence, analytics and performance improvement projects related to: * Operating expenses - Shipping industry * CRM and customer segmentation – Banking sector * Fraud detection – Energy industry * Preventive grid maintenance – Gas & Utility Industry * Market basket analysis – Retail * Asset quality review - Banking sector * Campaign evaluation - Telco - Participation in analytics portfolio development and proposal submission for multiple analytics projects
Hellenic Army
Private - GIS Consultant / Geo-data Analyst (KEPYES)- Participation in Geographic Information System design - Evaluation and handling of geospatial data
IRi Analytics Center of Excellence (ACE)
Shopper & Basket Analytics Manager- Management of the Shopper/Basket Analytics team (7 people) - Participation in the development of Shopper/Basket Analysis as a new service - Working with clients to identify their needs and shape business questions asked - Managing the deliverable schedules to clients and ensuring timely completion - Design and evaluation of analytical solutions for standard and ad-hoc client requests - Delivering insights and presenting to the client - telling the story - Participation in shaping analytics team rollout
IRi Analytics Center of Excellence (ACE)
Consultant- Data management and quality assessment of large transactional data sets (~2 billion rows) - Application of descriptive and predictive modeling techniques in SAS, R and C to deliver: * Product affinity analysis (data mining) * Trip mission analysis (basket segmentation) * Store segmentation * Online customer profiling using clickstream data * Promotion evaluation - Development of bespoke analytical and reporting solutions
Foundation for Research and Technology - Hellas (FORTH), Regional Analysis Division (RAD)
Research Associate- Development and application of urban and demographic change simulation models in order to populate different developmental scenarios - Elaboration of approved by the EU study on Sustainable Urban Metabolism in Athens - Participation in designing and developing coastal zone management system - Participation in national (Greek) and European research projects
Unixfor
Business Analyst- Design and implementation of customer data base queries – Oracle Forms
Infocharta Ltd.
Seasonal external collaborator- Collection and processing of spatial data for one of the first mapping/routing web applications in Greece (driveme.gr) - Mapping of Greek national roads on motorcycle