About Me
I’m John Mahon, a retired IT professional with over 30 years of experience providing data solutions and supporting teams in the banking, financial services and insurance industry as well as retail, manufacturing, telecoms, training and education. In that time, I have developed many systems and improved processes that made a real difference ... day to day.
My focus has always been on solving real-world problems with simple, effective tools: reporting systems, workflow improvements, and scalable solutions that help people work smarter and waste less time.
These days, I work independently — building custom spreadsheets, database-driven tools, and lightweight web applications for small businesses and growing teams.
Who I Help
Business teams who want to stay organised and in control.
Trades & Installers
- ✔️ Track jobs, customers, and suppliers in one place
- ✔️ Analyse project costs and job profitability
- ✔️ Quote with confidence using real data
- ✔️ Reduce admin time with tailored tools
Startups
- ✔️ Get organised early with lightweight systems
- ✔️ Build lean tools that grow as you grow
- ✔️ Avoid software bloat and keep costs low
- ✔️ Focus on your business — not the admin
Small & Medium Businesses
- ✔️ Replace scattered systems with one that fits
- ✔️ Automate workflows and reduce manual tasks
- ✔️ Improve reporting and business visibility
- ✔️ Stay in control as your team or data grows
Sales Teams & Reps
- ✔️ Keep leads, contacts, and follow-ups in one place
- ✔️ Stop things falling through the cracks
- ✔️ Track conversations without spreadsheets
- ✔️ Sell more — without adding more admin
Case Studies
Here are things I’ve done, and how they turned out.
Spreadsheet Comparison for Office Admin
Problem: A process manager relied on an administrator to manually compare two production spreadsheets to track progress and report changes. Each comparison took roughly 90 minutes and had to be repeated multiple times per day.
Solution: I built an automated tool that compared the two spreadsheets, generated a summary report, created an email, and saved it in the drafts folder — all triggered by a single click.
Result: The process now takes just 1 minute 20 seconds, saving nearly 6 hours per day and freeing up the administrator for higher-value work.
Replacing a Paper-Based PO System with a Live Costing Database
Problem: A purchasing team relied on a triplicate paper-based purchase order system. Orders were scanned and emailed manually, and the production manager updated a separate Excel sheet to track project costs. This led to crossed wires, missing data, and unreliable cost reporting.
Solution: I built a custom database system that fully digitised the PO process. The system integrates with email to automatically send and archive purchase orders, while also feeding data directly into a live project cost analysis report.
Result: Everyone involved now has real-time visibility of what’s been ordered. The entire process is automated and paper-free. Project costing is no longer guesswork — it’s live, accurate, and always up to date.
Services
I offer practical support across five core areas:
- ✔️ Lightweight, Web-based Solutions
- ✔️ Database Design and Custom Spreadsheets
- ✔️ Data Services
- ✔️ BI Reporting
- ✔️ Admin Support and Document Workflows
Explore the details below.
Here’s why it might be worth working together:
- Tailored to Fit
I build web apps designed around your workflows, your data, and your team — so you get exactly what you need, and nothing you don’t. - Accessible Anywhere
Your tools can be accessed from any device — in the office, on site, or on the move. - Streamlined & Lightweight
I build clean, simple interfaces without unnecessary clutter — no training manual needed. - Integrated & Automated
I can connect your systems, automate repetitive tasks, and improve process speed and accuracy. - Secure & Scalable
Your system grows with you and includes strong safeguards for your data. - Affordable, Practical Development
I work directly with clients, offering straightforward, functional solutions that are easy to use and maintain.
Build once, use anywhere — that’s the value of a well-designed web app.
Here's why it's essential:
- Time Savings
By automating routine tasks such as data entry, document generation, and email management, startups and SMEs can reclaim valuable time that can be redirected towards more strategic initiatives, innovation, and business development. - Cost Efficiency
Automating repetitive tasks reduces the need for manual labor, resulting in cost savings for startups and SMEs. Whether it's through streamlined workflows, optimized resource allocation, or reduced error rates, office automation helps businesses do more with less. - Enhanced Accuracy
Human error is inevitable, but it can be minimized with automation. By standardizing processes and eliminating manual intervention, startups and SMEs can ensure greater accuracy and consistency in their operations, leading to improved data quality and decision-making. - Scalability
As startups and SMEs grow, so do their administrative burdens. Office automation solutions are scalable, allowing businesses to easily adapt to increasing workloads and demands without the need for significant investments in additional manpower or infrastructure. - Improved Collaboration
Office automation tools facilitate seamless collaboration among team members, regardless of their location. By centralizing information, streamlining communication, and enabling real-time access to data, startups and SMEs can foster a collaborative work environment that drives productivity and innovation. - Competitive Advantage
In today's fast-paced business environment, agility is key. Startups and SMEs that embrace office automation gain a competitive edge by accelerating processes, responding quickly to market changes, and delivering superior customer experiences. - Focus on Core Competencies
Office automation allows startups and SMEs to focus on what they do best—innovating, creating value, and serving their customers. By automating routine tasks, businesses can free up resources to concentrate on strategic priorities and growth initiatives.
I build practical tools that free up your time and keep your business moving.
Here’s why it might be worth working together:
- Tailored Solutions
I know every business is different, with its own challenges and goals. That’s why I build bespoke databases that are shaped around your specific needs — so you get real value from your data, not just another system to work around. - Scalability
As your business grows, your data needs grow too. I design systems that scale with you — whether you’re expanding quickly or taking steady steps — so you’re never held back by your database. - Cost-effectiveness
I understand that budgets can be tight — especially for startups and small businesses. That’s why I offer flexible pricing and scalable solutions that fit your needs without stretching your resources. You’ll get solid value without paying for more than you need. - Data Security
Keeping your data safe is a top priority. The systems I build include strong security measures to protect your sensitive information from breaches and cyber threats — so you can feel confident that your data is in safe hands. - Expert Support
From setup to ongoing support, I’m here to help at every stage. Whether you need a hand getting started, troubleshooting an issue, or fine-tuning your setup, I’m just a call or message away — making sure you get the most out of your database. - Competitive Advantage
In a competitive world, making the most of your data can give you a real edge. I build systems that help you pull out useful insights — so you can make smarter decisions and stay one step ahead.
I’d be glad to help you unlock the full potential of your data and use it to drive your business forward.
Get the foundation right, and everything else becomes easier — that’s what I build for you.
I create tailored spreadsheets that do exactly what you need — no bloat, just smart, efficient tools built for your business.
I can help with that. My custom-built spreadsheets are designed to do the heavy lifting for you.
Here’s why it might be worth working together:
- Customization
I build spreadsheets around your specific business needs, so you’ve got the right tools to manage your data clearly and confidently. - Efficiency
The spreadsheets I build are designed to simplify the complex, cut down on repetitive work, and reduce errors — all to save you time and hassle. - Scalability
As your business grows, I can adapt your spreadsheets to handle new data and changing needs — so they stay relevant and keep working for you. - User-Friendly
I design spreadsheets that are easy to use and don’t need much training — so you and your team can get up to speed quickly and start seeing the benefits right away. - Cost-Effective
Tailored spreadsheet development is a cost-effective solution that provides high value without the need for expensive software or extensive IT infrastructure. - Data Accuracy
I build in smart checks and validation rules to help keep your data accurate and reliable — which makes decision-making a whole lot easier. - Expert Support
I’m always on hand to tweak, update, or improve your spreadsheets as your needs change — so they keep delivering value as your business evolves.
I’d be happy to help you make more of your data — and use it to move your business forward.
If your spreadsheets are slowing you down, I’ll build ones that move you forward.
I offer data collection and aggregation services that bring all your scattered data together into one clear, usable format — so you can actually act on it.
Here’s why investing in these services is crucial:
- Informed Decision-Making
Data collection and aggregation provide startups and SMEs with a comprehensive view of their market, customers, and competitors. By consolidating data from various sources, businesses can make informed, data-driven decisions that enhance strategy and drive success. - Enhanced Customer Insights
Understanding customer behavior and preferences is key to building strong relationships. Data aggregation helps businesses gather insights from customer interactions across multiple channels, enabling personalized marketing, improved customer service, and tailored product offerings. - Market Trends and Competitive Analysis
Staying ahead of market trends and competitors is vital for growth. Data collection allows startups and SMEs to monitor industry developments, track competitor activities, and identify emerging opportunities or threats, ensuring they remain competitive and proactive. - Operational Efficiency
Aggregating data from various sources into a single, unified view streamlines operations. It reduces the time and effort needed to gather and analyze information, allowing startups and SMEs to focus on core business activities and strategic initiatives. - Scalability
As startups and SMEs grow, so do their data needs. Data collection and aggregation solutions are scalable, allowing businesses to handle increasing volumes of data without compromising on accuracy or speed, ensuring that data remains a valuable asset at every stage of growth. - Cost Savings
Efficient data management leads to cost savings. By automating the collection and consolidation of data, businesses can reduce the need for manual processes, minimize errors, and make more cost-effective decisions based on accurate, up-to-date information. - Regulatory Compliance
Ensuring data compliance is crucial to avoid legal repercussions. Data aggregation services help startups and SMEs maintain compliance with industry regulations by providing accurate and consolidated records, thereby mitigating risks associated with data management. - Competitive Advantage
Leveraging harvested and aggregated data provides a significant competitive edge. Businesses can identify new market opportunities, optimize their operations, and enhance customer experiences faster and more effectively than competitors who lack a robust data strategy.
I help you pull scattered data into one place — so you can stop guessing and start acting.
Here's why investing in data cleansing services is crucial:
- Enhanced Decision-Making
Clean data provides a reliable foundation for decision-making. By eliminating inaccuracies, duplicates, and inconsistencies, startups and SMEs can make informed decisions based on trustworthy information, leading to better outcomes and strategic advantages. - Cost Savings
Inaccurate data can be costly. It leads to wasted resources spent on incorrect marketing campaigns, misdirected sales efforts, and flawed analytics. Data cleansing services help startups and SMEs avoid these pitfalls, saving both time and money in the long run. - Improved Efficiency
Data quality directly impacts customer relationships. Inaccurate or outdated information can lead to communication errors and frustration among clients. By ensuring clean data, startups and SMEs can deliver personalized experiences, build trust, and foster long-term customer loyalty. - Enhanced Customer Relationships
Clean data streamlines business operations. It reduces the time spent searching for information, resolving discrepancies, and manually correcting errors. With accurate data, startups and SMEs can operate more efficiently, focusing their efforts on growth and innovation. - Regulatory Compliance
Many industries are subject to strict data regulations. Non-compliance can result in hefty fines and damage to reputation. Data cleansing services help startups and SMEs maintain compliance by ensuring that their data meets regulatory standards, mitigating risks and safeguarding against potential legal consequences. - Competitive Advantage
In today's competitive landscape, startups and SMEs must leverage every opportunity to stand out. Clean data provides a competitive advantage by enabling more accurate insights, better targeting of customers, and more effective resource allocation
If your data’s messy, decisions suffer — I can help you fix that.
Here's why:
- Clarity and Understanding
Data visualization makes complex information easy to understand at a glance. For startups and SMEs with limited resources, this clarity is invaluable for quickly grasping trends, patterns, and relationships within their data, enabling better decision-making. - Identifying Opportunities and Risks
Visualizing data allows startups and SMEs to identify both opportunities and risks more effectively. Whether it's spotting emerging market trends, pinpointing areas for improvement, or identifying potential threats, data visualization enables businesses to stay agile and proactive in a rapidly changing landscape. - Communication and Collaboration
Visual representations of data facilitate communication and collaboration within startups and SMEs. Instead of relying on spreadsheets and reports, which can be dense and difficult to interpret, visualizations enable stakeholders to quickly share insights, align on strategies, and drive consensus across teams. - Engaging Stakeholders
Whether it's investors, customers, or employees, stakeholders are more likely to engage with and understand data when it's presented visually. Startups and SMEs can use data visualization to tell compelling stories, showcase achievements, and convey the value proposition of their products or services more effectively. - Performance Tracking and Goal Setting
Data visualization provides startups and SMEs with a clear view of their performance metrics and progress towards goals. By visualizing key performance indicators (KPIs) in real-time dashboards, businesses can track their performance, identify areas for improvement, and make data-driven adjustments to their strategies. - Competitive Advantage
In today's data-driven world, startups and SMEs that leverage data visualization gain a competitive advantage. By turning data into insights and insights into action faster than their competitors, businesses can make more informed decisions, adapt to market changes more quickly, and outmaneuver their rivals.
I help you see the story behind the numbers — and use it to make better decisions.
Here's the kind of support I provide:
- Data Management: Reliable entry and upkeep of customer records, inventory, and other datasets.
- Email & Calendar: Inbox management, scheduling, and follow-up tracking so you stay on top of things.
- Customer Support: Prompt, professional handling of emails, calls, or chats to maintain great client relationships.
- Document Handling: From formatting to storage — reports, presentations, and contracts all handled with care.
- Financial Admin: Bookkeeping, invoicing, and expense tracking to simplify your financial picture.
- Research & Reporting: Data compilation and reporting to support confident decision-making.
- Project Support: Task coordination, progress tracking, and team support to keep things moving smoothly.
If you're ready to simplify your operations and free up your time, I’d be glad to help.
Get the day-to-day under control — it’s the foundation for everything else.
Contact Me
Call Me
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Address
Main Street
Lifford
County Donegal
Ireland
F93PKF1