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MIT-Credentialed Data Scientist | Emory Instructor | LSSMBB
William C.

4.9 (44 ratings)

113 hours tutoring

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Hourly Rate: $75
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About William

Bio

I teach professionals and graduate students how to think with data and improve how work gets done. My core subjects are Lean Six Sigma (Green Belt, Black Belt, and certification exam prep), applied statistics, data science with Python and SQL, and project management. I currently serve as an adjunct instructor at Emory University, where I teach Lean Six Sigma courses and coach working professionals through full DMAIC projects from charter to control plan. Before that, I spent a career leading...

I teach professionals and graduate students how to think with data and improve how work gets done. My core subjects are Lean Six Sigma (Green Belt, Black Belt, and certification exam prep), applied statistics, data science with Python and SQL, and project management. I currently serve as an adjunct instructor at Emory University, where I teach Lean Six Sigma courses and coach working professionals through full DMAIC projects from charter to control plan. Before that, I spent a career leading and training teams: I retired from the U.S. Army as a Command Sergeant Major after decades of building instruction programs and developing leaders, then moved into private industry as a Master Black Belt driving improvement programs in Tier 1 automotive manufacturing.
My educational background includes MIT data science credentials and Lean Six Sigma Master Black Belt certification, and I am the author of a published book on continuous improvement. I have taught in classroom settings, one-on-one coaching engagements, and corporate training environments, working with students ranging from college-age learners to mid-career executives. Most of my recent teaching is individual coaching: I currently mentor Black Belt candidates through Emory one-on-one, reviewing their real workplace projects, correcting their statistical analysis, and preparing them to defend their work.
My method is simple and proven: I teach the concept, demonstrate it with a real example from industry, then have you apply it immediately while I coach. Students do the work; I make sure they understand why it works. Whether you are preparing for a certification exam, struggling in a statistics course, learning SQL, or leading your first improvement project at work, you will leave every session with something you can use the same day. Expect direct feedback, practical examples, and steady progress.

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Education

Excelsior University
Mfg Eng Tech
university of the people
MBA

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Approved Subjects

ADHD

ADHD

I coach students and professionals with ADHD on the executive function skills that make school and work manageable: breaking large tasks into steps, building study and work systems that hold up on low-motivation days, managing time and deadlines, and getting started when starting feels impossible. As a twice-exceptional, high-performing adult with ADHD myself, I coach from direct experience with what actually works — not theory, but the concrete systems I have used to lead complex operations and build a successful career while managing the same challenges my students face. My professional background reinforces this: I spent a career designing structure and training people for a living, first as a U.S. Army instructor and Command Sergeant Major, then as a process improvement expert and current adjunct instructor at Emory University. My approach is practical rather than clinical: we build external systems, checklists, and routines that work with your brain instead of against it, and every session ends with a concrete plan you can execute before we meet again, whether you are a high school student or a working adult.
Autism Spectrum Disorder (ASD)

Autism Spectrum Disorder (ASD)

I hold three formal instructor certifications — Total Army Instructor, Small Group Instructor, and Drill Sergeant — and I teach as adjunct faculty at Emory University; as a Lean Six Sigma Master Black Belt I have trained and mentored more than 500 Green Belts and Black Belts, and I routinely teach remedial math and statistics to adult learners who were failed by how the material was delivered the first time. I tutor autistic and AuDHD students in that same quantitative coursework and in the executive function skills that decide whether the work actually gets done: task initiation, sequencing an assignment into ordered steps, time estimation, note and material systems, and external structure that does not depend on motivation arriving on schedule. As a late-diagnosed twice-exceptional autistic adult with ADHD, I have also developed a structured instructional framework for autistic learners and their parents covering sensory and regulation planning, executive function scaffolding, and the distinction between meltdown, shutdown, and burnout — built on current research and autistic-led scholarship rather than compliance-based models. Sessions run on predictable structure — agenda sent in advance, direct and literal language, no forced eye contact, camera optional, stimming welcome — and I am an instructor, not a clinician: I teach academic content and the systems that make it accessible, and do not diagnose or provide therapy.
Business

Business

I run a consulting firm serving as fractional COO and CFO for healthcare and professional services companies, advising CEOs on operations, finance, and growth strategy. I retired from the U.S. Army as a Command Sergeant Major after leading large organizations and managing theater-level logistics, then spent two decades in Tier 1 automotive manufacturing leadership. I teach business improvement methods as an adjunct instructor at Emory University and am a published author on operational excellence. I coach students and professionals in business strategy, operations management, finance fundamentals, and leadership with real examples from industry.
Computer Science

Computer Science

I teach computer science from the working-code side rather than the lecture-slide side. My graduate capstone in applied data science was a convolutional neural network image classifier engineered to run on a Raspberry Pi under strict power and connectivity constraints — a project where algorithmic efficiency, data structure selection, and memory footprint stop being abstractions and start determining whether the thing runs at all. I teach at the university level as an adjunct and spent four decades leading teams in operational environments, so I diagnose where a student's understanding actually breaks rather than re-explaining the same concept louder. I work primarily in Python and cover data structures, algorithms, complexity analysis, and the language-independent fundamentals that transfer to whatever stack a student lands in next.
Data Analysis

Data Analysis

I hold MIT data science credentials and have spent two decades analyzing real operational data as a Lean Six Sigma Master Black Belt in Tier 1 automotive manufacturing and as a fractional executive advising CEOs. I teach data analysis daily: as an adjunct instructor at Emory University I coach professionals through hypothesis testing, regression, control charts, and root cause analysis on their actual workplace data. I work fluently in Python, pandas, SQL, and Excel, and I teach students to move from raw data to defensible conclusions, not just to run the numbers. Whether you are in a statistics course, learning analytics for your job, or building a capstone project, I show you how professionals actually interrogate data and present findings that hold up to scrutiny.
Data Science

Data Science

I hold MIT data science credentials and build production data science and AI systems for a living: my company develops machine learning pipelines, LLM applications, and analytics platforms for healthcare and business clients. I interviewed for lead data scientist roles at Fortune 500 companies and work daily in Python, pandas, scikit-learn, SQL, simulation modeling, and modern AI tooling. I teach as an adjunct instructor at Emory University and coach students one-on-one through the full data science workflow: framing the problem, cleaning data, choosing models, validating results, and communicating findings to decision makers. Whether you are in a bootcamp, a graduate program, or teaching yourself, I focus on the judgment that separates working data scientists from people who just know syntax.
Finance

Finance

I work as a fractional CFO for small and mid-sized businesses, where I build budgets, cash flow forecasts, and monthly financial statements that owners actually use to make decisions. I am a certified QuickBooks ProAdvisor and a Lean Six Sigma Master Black Belt, which means I teach finance as a connected system — how a transaction becomes a journal entry, how entries become statements, and how statements drive capital and operating decisions. My graduate work in applied data science means I am equally comfortable on the quantitative side: time value of money, NPV and IRR, capital budgeting, ratio and variance analysis, valuation, and Excel-based financial modeling. I also teach at the university level as an adjunct instructor, so I know how to move a student from "I got the right number" to "I can defend this number to a room."
Financial Accounting

Financial Accounting

I close books for a living. As a fractional CFO and certified QuickBooks ProAdvisor, I work through the full accounting cycle every month for real companies — journal entries, adjusting and closing entries, accruals and deferrals, depreciation schedules, inventory and COGS, and the preparation of the income statement, balance sheet, and statement of cash flows under GAAP. Because I teach at the university level as an adjunct instructor, I know exactly where students get stuck: debits and credits feel arbitrary until you see that every entry is just the accounting equation staying balanced, and adjusting entries make no sense until you separate when cash moves from when the event actually happens. My approach is to fix the underlying logic first, then drill the mechanics, so you can work an unfamiliar problem on an exam instead of trying to pattern-match one you have already seen.
Machine Learning/ AI

Machine Learning/ AI

I build and deploy machine learning and AI systems in production through my company, including LLM applications, retrieval-augmented generation pipelines, agentic workflows, and self-hosted open-weight models running on my own GPU infrastructure. I hold MIT data science credentials and work hands-on every day in Python, scikit-learn, PyTorch-adjacent tooling, vector databases, and modern LLM frameworks, so I teach from current practice rather than textbook theory. As an adjunct instructor at Emory University and a one-on-one coach, I walk students through the full arc: supervised and unsupervised learning, model training and evaluation, prompt engineering, and getting a model out of a notebook and into something people actually use. Whether you are learning the fundamentals, preparing for a technical interview, or building your first real AI project, I focus on the practical judgment that makes systems work.
MBA

MBA

I coach MBA students through the courses that trip most people up: statistics, operations management, managerial accounting, finance, organizational behavior, and capstone projects. I teach graduate-level professionals as an adjunct instructor at Emory University and work daily as a fractional COO and CFO advising CEOs, so I connect every concept to how it actually plays out in a real business. My background includes MIT data science credentials, Lean Six Sigma Master Black Belt certification, a published book on operational excellence, and a career leading organizations in the U.S. Army and Tier 1 automotive manufacturing. I help students master frameworks like Porter's Five Forces, DCF analysis, and process design, then apply them in case studies, discussion posts, and written assignments with confidence.
Microsoft 365

Microsoft 365

I use the Microsoft 365 stack every day as a fractional COO and CFO — building the spreadsheets, shared workspaces, and reporting cadences that small and mid-sized businesses actually run on. My work centers on Excel for financial modeling, forecasting, and data analysis, extended across Outlook, Teams, SharePoint, and OneDrive to keep files, communication, and version control from turning into a mess. I'm a certified QuickBooks ProAdvisor and hold a Lean Six Sigma Master Black Belt, so I approach these tools as a process problem first: the goal is a workflow that holds up under pressure, not a list of features. I teach at the university level and work well with adult learners and career changers who need to be functional in a specific task by a specific date.
Microsoft Access

Microsoft Access

Most students who struggle with Access aren't struggling with Access — they're struggling with relational database design, and the software is just where the confusion becomes visible. I teach the underlying structure first: entities and relationships, primary and foreign keys, normalization through third normal form, and why a badly designed table makes every query downstream harder than it needs to be. From there I work through query design, joins, calculated fields, forms, and reports, and I connect Access queries to standard SQL so the skill transfers to whatever database a student encounters after the course ends. I hold a Lean Six Sigma Master Black Belt and a graduate degree in applied data science, and I work with data structures professionally as a fractional COO and CFO, so I can show students why the design rules exist rather than asking them to memorize a list.
Microsoft Excel

Microsoft Excel

Excel is the tool I work in every day as a fractional CFO — building budgets, cash flow forecasts, three-statement models, and operating dashboards that clients run their businesses on. I am fluent across the range students actually need: absolute and relative references, XLOOKUP and INDEX/MATCH, nested IF and IFS logic, SUMIFS and COUNTIFS, pivot tables and slicers, data validation, conditional formatting, Power Query, and financial functions including NPV, IRR, PMT, and Goal Seek. As a Lean Six Sigma Master Black Belt with graduate training in applied data science, I also handle the analytics side — regression, descriptive statistics, Solver optimization, and scenario and sensitivity analysis. Most Excel problems are not formula problems, they are structure problems, so I teach students to lay out a worksheet correctly first, which is why their models stop breaking when the data changes.
Microsoft PowerPoint

Microsoft PowerPoint

I build decks that get decisions made — board and lender presentations, operating reviews, and client briefings — as a fractional CFO working directly with executive teams. I am fluent in the mechanics students and professionals both need: slide masters and layouts, theme and template control, charts linked to live Excel data, SmartArt and diagramming, alignment and distribution tools, animation and transitions used with restraint, speaker notes, handout and PDF export, and accessibility features including alt text and reading order. My military career was spent briefing senior decision-makers, where the bottom line goes on the first slide and every slide after it has to earn its place — that discipline is the difference between a deck that informs and a deck that gets skimmed. As an adjunct instructor I also grade student presentations, so I know how rubrics are actually scored and can help you build something that meets the requirements and holds up under Q&A.
Microsoft Project

Microsoft Project

Microsoft Project punishes people who build a schedule before they understand the plan behind it, which is why most students end up with a Gantt chart full of dates that don't mean anything. I start with the work breakdown structure, then task dependencies, durations, and the critical path — so that when the software recalculates a schedule, the student knows why it moved. From there I cover resource assignment and leveling, baselines, tracking actuals against plan, and reading the variance the tool reports back. My background is graduate coursework in project management aligned to the PMBOK framework plus four decades of leading large-scale operations where schedules, resources, and constraints were real, and I hold a Lean Six Sigma Master Black Belt, so I teach scheduling as a planning discipline rather than a data-entry exercise.
Microsoft Word

Microsoft Word

I produce long-form professional documents for a living — operating manuals, procedures, financial reports, and client deliverables — and I teach at the university level as an adjunct instructor, where I read and grade formatted academic papers every term. I cover the features that actually cause the problems: styles and heading hierarchy, automatic tables of contents, section breaks, headers and footers that differ by section, page numbering that starts where it should, hanging indents, the References tab and citation management, footnotes, captions and cross-references, track changes and comments, tables, templates, mail merge, and accessibility settings including alt text and reading order. I work in APA and MLA regularly and can walk you through a paper from title page to reference list until the formatting is no longer the thing standing between you and the grade. Almost every Word problem I see comes from formatting text by hand instead of applying styles, so I teach the document structure first — once the styles are set, the table of contents builds itself and stops breaking every time you edit a heading.
Python

Python

I write Python daily to build real systems: discrete-event simulation models with SimPy, data pipelines with pandas and NumPy, database work with SQL, and AI applications using modern LLM frameworks. I hold MIT data science credentials and have applied Python across two decades of operations and analytics work, from manufacturing process models to production software for business clients. As an adjunct instructor at Emory University I coach professionals one-on-one, and my method is consistent: I teach the concept, show a working example, then have you write code while I coach and catch the mistakes. Whether you're learning the fundamentals, working through a course, tackling SimPy or data analysis, or debugging a project that won't behave, you leave every session with running code you understand.
QuickBooks

QuickBooks

I am a certified QuickBooks ProAdvisor and work daily in QuickBooks Online as a fractional CFO managing the books for healthcare and professional services companies. I handle the full cycle in live client accounts: chart of accounts setup, invoicing, accounts receivable and payable, bank reconciliation, payroll, month-end close, and financial reporting. I teach business courses as an adjunct instructor at Emory University and bring that same structured teaching approach to one-on-one QuickBooks coaching. Whether you are a business owner setting up QuickBooks for the first time, a bookkeeper building skills, or a student learning accounting software, I teach you the workflow the way it is actually done in practice.
R

R

I use R for applied statistical work: data wrangling with dplyr and tidyr, visualization with ggplot2, and modeling from linear and logistic regression through ANOVA, hypothesis testing, and time series. My graduate training in applied data science and my Lean Six Sigma Master Black Belt certification mean I approach R as a working analyst rather than a programmer — the code is a means to a defensible conclusion, not the point in itself. I am fluent in the workflow students are actually graded on: importing messy data, cleaning and reshaping it, running the correct test for the design, and interpreting the output rather than just producing it. Most students who struggle in R are not struggling with syntax; they are struggling to say what the model is actually claiming, so I teach the statistics and the code together and require you to state the conclusion in plain English before we move on.
SQL

SQL

I write SQL against live business data as a fractional CFO and analyst — pulling transaction detail, building revenue and margin summaries, and reconciling systems that disagree with each other. I cover the full query surface students are tested on: SELECT and filtering, all four join types, GROUP BY and HAVING, subqueries and correlated subqueries, CTEs, window functions, set operations, and DDL/DML for building and modifying tables. I also teach the design half of the course that most tutors skip — entity-relationship diagrams, cardinality, primary and foreign keys, junction tables, and normalization through 3NF and BCNF — because a query that will not work is usually sitting on a schema that was never modeled correctly. My students learn to read a question, identify the grain of the answer, and then write the query, which is the reverse of how most people start and the reason their results stop coming back wrong.
Statistics

Statistics

Statistics is the core of my professional work: as a Lean Six Sigma Master Black Belt I use hypothesis testing, regression, ANOVA, control charts, and designed experiments to determine whether a change in a business process actually did anything or whether the difference was noise. I cover the full introductory sequence — descriptive statistics, probability, discrete and continuous distributions, sampling distributions and the Central Limit Theorem, confidence intervals, one- and two-sample t-tests, proportions, chi-square, ANOVA, and simple and multiple linear regression — along with the upper-level topics that follow, including nonparametric methods, experimental design, and logistic regression. My graduate training in applied data science means I work these problems in software as well as by hand, so I can support you in Excel, R, or Python depending on what your course requires. Most students do not fail statistics because the arithmetic is hard; they fail because nobody told them how to choose the right test, so I teach you to read a problem and identify the design first — how many groups, paired or independent, what type of variable — and the procedure follows from there.

Examples of Expertise

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Ratings and Reviews

Rating

4.9 (44 ratings)
5 star
(42)
4 star
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3 star
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2 star
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Reviews

Accounting and ERP, Excel

William is amazing, with an unbelievable depth of experience and knowledge about both personal and corporate matters. He’s very patient and smart, and he’s definitely my go-to person.

Fatima, 7 lessons with William

The best instructor I have ever had!

Rob is truly the best instructor/mentor I have ever had in ANY course, school, or academic pursuit. I have learned so much in such a short time working with Rob, and he has helped me advance towards my goals in an efficient and enlightening way. Rob takes the time to prepare a well thought-out lesson plan that challenges the student to develop and hone their skills, and then he thoughtfully reviews and constructively corrects the student's efforts. I could not imagine a better fit for the project I am working on.

John, 4 lessons with William

Incredibly patient and tech savvy instructor

If you’re looking for someone who is knowledgeable about artificial intelligence and someone who can offer individualized support with details documents, explaining next steps, this is a tutor for you. Everything from the way he interacts with artificial intelligence and response quickly to student questions is phenomenal.

Diamond, 3 lessons with William

A knowledgeable and patient tutor

I have never had a tutor that explain everything so quickly, and with a finesse that really helped me understand the material at heamd quickly. William (Rob) helped me right off the bat. He reviewed my materials ahead of booking the session and provided insight of how to jump right in the learning session. I did pick up a few small tools along the way, which I was not expecting. I felt like I was being taught, not just given the answers, which is really what I wanted. Rob also reviewd my post work and gave some more advice on how to polish up what I was going to submit. In turn, I ended up crushing the final summative assignment all thanks to the help I recieved. Very pleased with the help and the results! In the future, I am sure that I will need assistance, and when I do, Rob will be my go to for that help.

Adam , 1 lesson with William
Hourly Rate: $75
Response time: 32 minutes
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