Excel Consultant: Fix, Automate and Stabilise the Workbooks Your Business Runs On
The pricing model, the weekly sales pack, the job tracker: somewhere in your business is a workbook that everyone depends on and one person understands. When it slows down, breaks, or takes a day to update, the work stops with it.
An Excel consultant repairs and automates the workbooks a business depends on: formulas that return the wrong answer, files that take minutes to open, monthly routines built on copy and paste, and macros nobody dares to touch. Lightray Solutions does this remotely, and Edward Pinela, MBA, does the work himself rather than passing it to a junior.
Most jobs are fixed-scope: one workbook or one routine, made reliable and documented so your own team can run it. The first step is a free 30-minute strategy call where you describe the problem and, ideally, share your screen. You then get a written quote; there is no published Excel price because no two workbooks are alike.
What does an Excel consultant fix?
The problems that cost time every week. A good engagement starts by finding out why a workbook misbehaves, not by rebuilding it. Often the cause is a handful of volatile formulas, a lookup pointed at the wrong range, or a manual step that someone does differently each month. The usual list:
- Wrong or fragile formulas: lookups that break when a column is inserted, totals that miss new rows, hard-coded numbers buried in formulas.
- Slow files: whole-column references, thousands of conditional formats, and data pasted into sheets that belongs in a data model.
- Manual routines: exports pasted, cleaned and reformatted by hand before anyone can read them.
- Macros nobody understands: VBA written years ago by someone who has left, with no notes.
- Version conflicts: copies emailed around, or a legacy shared workbook that keeps locking people out.
How do Power Query and Power Pivot replace copy and paste?
Power Query records the steps you repeat by hand, such as importing an export, removing junk rows, fixing dates and merging files, so next month's update is one refresh. Power Pivot, Excel's Data Model, stores large tables outside the worksheet grid and relates them, so pivot tables summarise millions of rows without lookups.
Two details matter when planning. Microsoft notes that the full Power Query experience is only in Excel for Windows, so a team on Macs needs a different route. And on 32-bit Excel, Microsoft's specifications and limits put the Data Model at roughly 500 to 700 MB of a shared 2 GB space; 64-bit Excel is limited only by the machine's memory, which is often the cheapest fix for a model that keeps crashing.
Should you automate with VBA macros or Office Scripts?
Use VBA for desktop-only tasks on Windows that already work and only need tidying; use Office Scripts for new automation that should run in Excel on the web or on a schedule. Microsoft's guidance on Power Query and Office Scripts recommends Power Query for pulling large external data and Office Scripts for Excel-centric tasks and Power Automate flows. Scheduled flows that move a workbook between Outlook, SharePoint and Teams are the territory of Power Automate consulting.
VBA has a practical problem in 2026: Microsoft blocks macros in files from the internet by default on Windows, so a macro workbook sent as an email attachment opens with a Security Risk banner and no Enable button. The fix is where the file lives, a trusted location or SharePoint opened in the desktop app, not telling staff to unblock files. The table compares the tools.
| Tool | Suited to | Runs in | Watch out for |
|---|---|---|---|
| Power Query | Importing, cleaning and combining exports and files on every refresh | Full experience in Excel for Windows | Mac users get a reduced experience; refresh needs the source files reachable |
| Power Pivot (Data Model) | Relating large tables and summarising millions of rows in pivot tables | Excel for Windows | 32-bit Excel caps the model at roughly 500-700 MB |
| VBA macros | Desktop tasks on Windows that already work and need tidying | Excel desktop on Windows and Mac | Blocked by default in files from the internet on Windows |
| Office Scripts | New automation, buttons and scheduled runs through Power Automate | Excel on the web, Windows and Mac | Scripts are stored in the author's OneDrive; scheduling now runs through Power Automate |
| Co-authoring | Several people editing the same file at once | Microsoft 365 desktop, web and mobile apps | Legacy Shared Workbooks must be converted first |
Why does a shared workbook keep breaking?
Usually because it uses the old Shared Workbooks feature, or because copies are emailed instead of shared. Microsoft describes Shared Workbooks as a legacy feature with many limitations, replaced by co-authoring; such files cannot even be edited in Excel for the web. Co-authoring lets several people edit at once and see each other's changes.
Co-authoring has requirements worth checking before a move: the file must sit in OneDrive or SharePoint Online, be saved as .xlsx, .xlsm or .xlsb, have AutoSave on, and everyone needs a Microsoft 365 subscription. Converting a legacy shared file usually also means replacing any macro that assumed one user at a time. When the real problem is how files and permissions are organized across the tenant, that belongs to Microsoft 365 consulting rather than to one workbook.
When should Excel hand the job over to Power BI?
When the workbook has stopped being a tool and become a report that many people read but few edit. If a file is refreshed on a schedule and mailed to managers, each reader needs to see only their own region, or people want it on a phone, Power BI does that job better and Excel can keep the modelling.
Lightray does both, so the advice has no reason to lean either way. If a workbook should stay in Excel, it is fixed in Excel. If it should move, the Excel to Power BI migration page explains how that project runs, and Power BI report automation covers scheduled delivery.
How does an Excel engagement work?
In three steps, all remote. First, a screen-share walkthrough of the workbook and a copy to examine, which produces a written diagnosis and a fixed quote. Second, the fixes or automation, built in a copy and checked against your current results until the numbers agree. Third, handover: a short recorded walkthrough and notes inside the file.
Plenty of Irvine and Orange County companies look for an Excel consultant nearby, but this work needs no visit; Lightray's business address is in Fullerton and every engagement runs over video. Edward has 20+ years and 200+ projects behind him, and Lightray's Google rating is 4.9. You get a reply within 4 business hours.
Further reading: Microsoft Learn — when to use Power Query or Office Scripts.
Is one workbook holding up your week?
Book a free 30-minute call with Edward Pinela, MBA. You get an honest read on what to fix first — and if we are not the right fit, you will hear that on the call.
Frequently asked questions
What does an Excel consultant cost?
Each job is quoted in writing after a free strategy call and a look at the workbook, so you see the price before any work starts. Small repairs are a short fixed-price job; automating a monthly routine or rebuilding a model takes longer, and the diagnosis says which.
How quickly can you fix our workbook?
A diagnosis usually follows within a few days of receiving a copy. A single repair can be finished soon after; automation of a full monthly routine is planned in stages so the current process keeps running until the new one has matched its results.
How does remote Excel help work?
Over video and screen share, with you or your staff driving where the data is sensitive. Work is done in a copy of the file, or directly in OneDrive or SharePoint with access you grant and remove. No one needs to visit your office.
What do you need from us?
A copy of the workbook, with sensitive values masked if needed, a sample of the exports it uses, and an hour with the person who maintains it. Knowing which Excel version and whether you use Windows or Mac matters, because it decides which tools are available.
Will we still understand the workbook after you change it?
Yes. That is the point of the handover. Power Query steps are named in plain words, formulas are simplified rather than made clever, and any macro or script gets comments and a short note on what to do if it fails. Your team should be able to maintain it without calling back.
You Won’t Get Handed Off to Junior Staff.
At most consulting firms, the senior person who sold you shows up for the kickoff — then you get handed to a team of juniors learning on your dime. That’s not how we work.
When you hire Lightray Solutions, you work directly with Edward Pinela, MBA — a principal consultant with 20+ years of experience across Power BI, web development, SEO, and CRM systems. Edward architects every engagement personally, stays involved through delivery, and answers his own phone.
Read Edward’s Full Bio“Mid-market companies deserve senior-level expertise without paying enterprise-agency prices. That’s the gap Lightray fills.”
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