Hire the Best DOS Specialists

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Madhan K.

Coimbatore, India

$6/hr
4.8
1,671 jobs

Struggling with bad CRM data and low reply rates? We combine AI tools with manual data mining to deliver 98%+ accurate custom B2B lead lists. Turn your ideal customers into verified prospects for your sales outreach. Marvel Technologies is a data services agency specialized in Prospect List Building, Lead Generation, Data Mining, Market Research, AI-Powered Lead Generation, Data Entry, Data Scraping, Company Research, Data Enrichment, List Building, and verified Email List Building. We work with businesses across all industries worldwide to build custom prospect lists based on your target industry, job title, company size, and location. Key Services: Lead Generation List Building Prospect List Contact List Email List Sales Lead List CRM Cleanup Data Mining Data Cleaning Data Enrichment Data Collection Data Processing Market Research Online Research Company Research Lead Research Data Entry Web Scraping LinkedIn Sales Navigator LinkedIn Lead Generation Administrative Support Key Deliverables - Generated over 9.5 Million+ B2B Contacts and Emails through advanced Data Collection, AI-Assisted Data Enrichment, List Building, Data Processing, and Data Cleaning for quality and accuracy. - Built, segmented, and maintained 12.5 Million+ business contacts and Prospect Lists with robust Research Methods and Contact Research with precise, validated, and verified information, at a sustained 98%+ deliverability rate verified through Zerobounce. Our Comprehensive Services - Lead Generation and B2B Lead Generation: Strategic development of highly segmented Prospect Lists, Data Extraction, and Sales Lead Lists for B2B Marketing, Sales, and Outbound Sales growth. - Email Marketing and Email List: Achieving superior Email Communication and campaign success with high-accuracy verified Contact Lists, verified by Zerobounce, and following best practices in Email Marketing and Email List Verification. - Data Cleaning and Data Processing: Maintaining CRM health & hygiene, we do rigorous Data Validation, Data Cleanup, and regular Data Enrichment to ensure every Contact List and Email List is updated. - Data Mining and Market Research: Leveraging Online Research, Company Research, Competitive Analysis, and insight-driven B2B Marketing to produce actionable Sales strategies. - Lead Nurturing and Lead Scoring: Support for Sales, B2B Sales, and Marketing with compelling Lead Nurturing solutions and Lead Generation Strategy to maximize lead conversion. - Administrative Support: Driving team efficiency and supporting business scaling with reliable Administrative Support and Virtual Assistance. - Data Entry and Data Scraping: Thorough manual and automated Web Scraping to populate Contact Lists, Data Enrichment projects, and CRM Software resources. Industry-Specific Contact Lists Benefit from custom, quality-verified lists for: - CxOs, Startup Founders, E-Commerce Executives, Educators, Healthcare Leaders, Manufacturing Professionals, IT & Tech Specialists, Real Estate Contacts, Event Organizers, General Contractors, Plumbers, HVAC, and more - Data and lists are segmented by job title, function, company size, sector, geography, and more, optimizing your outreach for B2B Sales, Marketing Strategy, and Research initiatives. - All work incorporates LinkedIn Lead Generation and LinkedIn Sales Navigator for superior targeting, accuracy, and lead quality. Why Choose Us? - 15+ years in B2B Lead Generation, Data Entry, Data Enrichment, and List Building or List Builder with a history of delivering validated, accurate, and quality-driven contact databases. - A skilled team of more than 20 professionals in Online Research, Market Research, Data Scraping, and Administrative Support, trusted by businesses for reliable Prospect Research and Prospect List development. - Commitment to On-Time Delivery, verified data accuracy, and superior quality through regular Data Cleaning, verified List Building, and high-standard process adherence - Comprehensive Lead Generation Strategies supported by CRM and B2B Marketing, ensuring every database is ready for Sales and Marketing use - Advanced Web Crawling, Web Research, Internet Research, Email List Generation, and Virtual Assistance for continuous support to Sales and Marketing pipelines Trust us for your Lead Generation, List Building, Data Enrichment, Data Entry, Data Scraping, Market Research, Outbound Prospecting, Target Account List, AI-based Ideal Customer Profile (ICP) and Total Addressable Market (TAM) Research, Niche Contact Research, CRM Deduplication, HubSpot Data Management, Contact Segmentation, Sales Operations and Revenue Operations Support, Go-to-Market Support, GTM Research, Campaign List Preparation, Contact Discovery, B2B Contact Sourcing, Email Sourcing, Lead Qualification, MQL Support, SQL Support, Local Business Database, Data Deduplication, List Segmentation, Prospect Validation, Contact Verification, and all effective outreach and accuracy with your marketing goals.

  • Data Mining
  • List Building
  • Market Research
  • Lead Generation
  • Online Research
  • Contact List
  • LinkedIn
  • Prospect List
  • Data Collection
  • Email List
  • Data Processing
  • Data Entry
  • B2B Lead Generation
  • Data Cleaning
  • Data Annotation
  • Data Preprocessing
  • Data Extraction
  • Sales Lead Lists
  • Lead Generation Strategy
  • Prospect Research
Reyland S.

Victorias, Philippines

$10/hr
5.0
13 jobs

I help founders and growing businesses take customer support, admin, and daily operations completely off their plates so they can focus on higher-level decisions and growth. With me, inboxes stay organized, follow-ups get done, and nothing quietly falls through the cracks. I have over 6 years of experience working as a Customer Service Representative, Email Support Specialist, Executive Assistant, and Project Coordinator, supporting e-commerce businesses and UK-based clients. My work includes handling high-volume inboxes through help desk systems, managing client cases, ensuring compliance and accuracy, responding to customer inquiries, and supporting internal teams with day-to-day operations. Most recently, I’ve worked with Brick as an Email Support and CSR, where attention to detail, clear communication, and responsible handling of customer cases are essential. I’ve also supported clients as an Executive Assistant and Account Manager, managing schedules, follow-ups, reporting, and ongoing tasks so business owners don’t need to think about the small but important details. If you’re looking for someone reliable, detail-oriented, and easy to work with long-term, I’d be happy to support you.

  • Customer Service
  • Technical Support
  • Virtual Assistance
  • Voice-Over
  • Shopify
  • Project Management Support
  • Data Annotation
  • Social Media Management Tracking
  • Shopify SEO
  • Shopify Development
  • Executive Support
  • Blog Development
Denys M.

Bydgoszcz, Poland

$15/hr
5.0
2 jobs

Experienced IT Support Analyst based in Poland (EU). Currently working as L1.5 Support at Atos, providing technical resolutions for enterprise users. Previously a Certified Repair Technician for Dell laptops. I focus on efficient diagnostics and resolution of hardware/software issues, strictly following SOPs and safety protocols. Core Competencies: Remote Support: Troubleshooting VPN, Connectivity, Office 365, Active Directory, Password resets. Hardware: Deep knowledge of laptop internals (Dell specialist), diagnostics, component replacement. Software: Windows 10/11 troubleshooting, driver issues, malware removal, ticketing systems (ServiceNow). Languages: English (Professional), Polish (Professional), Russian/Ukrainian (Native). Why hire me? Enterprise Standards: Trained to work in high-pressure corporate environments. Tech-Savvy: Fast learner of new proprietary software and tools. Reliable: Stable high-speed connection, based in Bydgoszcz. Ready to solve your technical challenge. Let’s talk!

  • Customer Service
  • Phone Communication
  • Troubleshooting
  • Hardware Troubleshooting
  • Hardware Testing
  • IT Support
  • Microsoft Windows
Vishaldeep S.

Nawanshahr, India

$15/hr
4.4
43 jobs

👋 Greetings! I'm Vishaldeep Singh – Your ConnectWise Automate, Connectwise RMM, Datto RMM & Kaseya VSA Expert 🌟 Why Choose Me: With 10+ years of deep-rooted experience in the Managed Service Provider (MSP) industry, I don’t just understand MSP operations—I optimize them. Whether you're a startup MSP looking to build from the ground up or an established one aiming to refine automation and patching, I bring the expertise to transform your infrastructure. 🛠️ My Core Skill Set: 🔹 ConnectWise Automate (LabTech) Administration: From initial setup to advanced automation, I've helped over 30 MSPs design, optimize, and scale their Automate environments. 🔹 Datto RMM: I help MSPs fully leverage Datto RMM—from onboarding devices and policy setup to alert tuning and automation scripting. 🔹 Kaseya VSA: I'm experienced in deploying, configuring, and managing Kaseya VSA with advanced automation, monitoring, and patching workflows that reduce noise and boost technician efficiency. 🔹 Advanced Scripting: Skilled in PowerShell, VBScript, and native Automate/Datto/Kaseya scripting languages to create workflows, auto-remediations, and intelligent alerting. 🔹 Patching & Monitoring: 95%+ patch success rate across clients with proactive monitor sets, auto-fix scripts, and customized schedules. 🔹 Backup & Antivirus Management: Proficient with Datto, Veeam, Acronis, and Symantec backup tools. I also manage Webroot, ESET, and others with custom infection-response scripting. 🔹 Migrations & Integrations: I’ve led seamless migrations between RMM/PSA platforms and integrated tools like QuickBooks, Control, and Manage to build unified systems. 🔹 SQL & Reporting: Strong SQL knowledge for creating customized dashboards, monitors, reports, and integrations within ConnectWise Automate and Kaseya. 🔹 Windows & Virtualization: Experienced with Windows Server (2008–2019), AD, GPO, DHCP, DNS, Hyper-V, and VMware. 🔹 ConnectWise Control Expert: Branded portal setup, SSL, access configuration—everything you need for a professional remote support experience. 🕒 Always On Duty: My work doesn’t end at setup. I provide ongoing support, performance tuning, and documentation to ensure long-term value. I treat your MSP like my own. ✅ Let’s Talk Results: If you need someone who can walk in and immediately provide value—be it automation, noise reduction, patching hygiene, or RMM customization—I'm your guy. 🙏 Thank you for considering me as a trusted partner in your MSP journey. Let’s simplify, automate, and scale—together.

  • Network Administration
  • Business with 1000+ Employees
  • Veeam
  • Server Virtualization
  • Windows Administration
  • Disaster Recovery
  • Desktop Support
  • Microsoft Exchange Server
  • Managed Services
  • VMware vSphere
  • ConnectWise Automate
  • PROXY Networks Remote Support Software
  • Data Backup
  • Microsoft Hyper-V Server
  • Microsoft Server
  • Office 365
  • OKTA
  • Microsoft Azure
Arde Lloyd E.

Dipolog, Philippines

$7/hr
5.0
6 jobs

Your tools shouldn't create more work — they should eliminate it. I make that happen. I'm a Tech VA & Systems Specialist who builds, connects, and optimizes the systems behind your business. CRM cleanup, workflow automation, cross-platform integrations, and process documentation — I handle the backend so your operations run cleaner, faster, and without the manual grind. While most VAs wait for instructions, I look at what's broken, flag it, and fix it. If your CRM is a mess, your team is copy-pasting between tools, or your follow-ups depend on someone remembering — I'm the person who solves that permanently. ━━━━━━━━━━━━━━━━━━━ WHAT I DO: 📧 Email & Calendar Systems Automated filters · Scheduling workflows · Inbox structure I don’t just organize inboxes — I build systems around them. Automated triage, smart filters, scheduling workflows, and calendar optimization that protect your focus time. Nothing slips, nothing gets buried. 📊 CRM & Pipeline Optimization HubSpot · Pipedrive · Salesforce · GoHighLevel Dirty data kills deals. I turn CRMs into reliable systems — pipeline automation, lead tracking, follow-ups, contact cleanup, tagging, segmentation, and reporting dashboards so your sales data is actually usable for decisions. 🔄 Workflow & Automation Support Make · n8n · Zapier · ManyChat · Meta APIs · Supabase · Slack I don’t just manage tasks — I eliminate the need for them. Onboarding flows, reminder systems, notifications, cross-platform integrations, and data syncing that remove copy-paste work and reduce errors to zero. 🗂️ SOP Development & Process Documentation If it lives in someone's head, it's a liability. I turn processes into clear, repeatable SOPs with screenshots, video walkthroughs, and step-by-step guides so your team can execute consistently without dependency or confusion. 📌 Project & Workflow Management ClickUp · Asana · Trello · Notion · Monday Board setup, task architecture, sprint workflows, and dashboards — designed around how your team actually works, not how the tool was intended to be used. ━━━━━━━━━━━━━━━━━━━ FULL TOOL STACK: Google Workspace · Slack · Trello · Asana · ClickUp · Notion · Monday · Make · n8n · Zapier · ManyChat · Meta APIs · Supabase · HubSpot · Pipedrive · Salesforce · GoHighLevel · Calendly · Loom · Airtable ━━━━━━━━━━━━━━━━━━━ WHY CLIENTS STAY: ✔ Systems-first mindset — I fix root problems, not symptoms ✔ Proactive execution — I identify and solve issues early ✔ Fast learner — I adapt quickly to any tool or workflow ✔ Detail-obsessed — clean systems, clean data, clean execution ✔ Low-maintenance — I bring solutions, not more questions You don't need another task-doer. You need someone who builds the machine. Let's talk about what's broken — I'll show you how to automate it.

  • Automation
  • Virtual Assistance
  • Make.com
  • Python
  • Process Improvement
  • Data Scraping
  • Shopify
  • Chatbot Development
  • API Integration
  • Google Workspace
  • Email Management
  • n8n
  • HighLevel
  • Zapier
  • ClickUp
  • Salesforce
Manish M.

Mumbai, India

$53/hr
4.9
1,067 jobs

Claude Code & Claude Cowork Architect — production AI agents, custom skills, and agentic systems for serious operators. I build production-grade AI systems on Claude Code and Claude Cowork — multi-agent applications, custom Claude skills, and MCP-integrated workflows that operate on live data, not demos. Becoming a member of the Anthropic Claude Partner Network. 790+ completed Upwork projects, 3,200+ hours, 4.9 across 485 reviews. Ex-Barclays Bloomberg AVP. Most "AI freelancers" wire up a chatbot. I architect agentic systems the way an engineering team would: structured project context, specialized subagents, reusable skills, error handling, and live system integration over the Model Context Protocol (MCP) — the kind of systems that survive audits, scale past 10x volume, and keep working when your team turns over. WHAT I BUILD WITH CLAUDE → Claude Code applications — full products architected and shipped end-to-end (React / FastAPI / Supabase), with custom subagents and skills doing the engineering. Recent: a Singapore recruitment portal with government-grade auth and live ATS, calendaring, and payment integrations. → Multi-agent systems — orchestrated agents that decompose complex work and hand off to each other. Recent: a public-sector bidding engine (Watchdog → Evaluator → Builder) using RAG to assemble 80% proposal drafts. → Custom Claude Skills — reusable, domain-specific capabilities (in the project's .claude skills folder) for document parsing, matching, compliance checks, and internal operations. → MCP integrations — Claude connected to live systems: Supabase, Airtable, Google Drive, Monday, n8n. Real read/write, not screenshots. → Claude Cowork operating systems — AI knowledge-workers that replace fragmented internal tooling for ops teams.ALSO FLUENT IN: n8n, OpenAI / Codex, VAPI & Retell (voice AI), RAG pipelines, HubSpot / GoHighLevel / Pipedrive, and Make Platinum Partner — used where they're the right tool alongside Claude. WHO I WORK WITH Founders and operators at $1M–$50M ARR companies in healthcare, fintech, and real estate who need automation that behaves like infrastructure, not duct tape: → Healthcare — intake, scheduling, HIPAA-aware agentic workflows → FinTech — KYC, compliance reporting, document processing → Real Estate — lead qualification, listing automation, broker dashboards WHY CLIENTS HIRE ME OVER A $25/HR FREELANCER I came to AI through 8 years at Barclays Investment Bank and Bloomberg, where a broken process cost millions. I architect systems with monitoring, documentation, and reliability built in — not bolted on after the first failure. I run Growwstacks, a 10-person agency in the Anthropic Claude Partner Network. You hire me, you get the agency: PM, QA, and the bandwidth for enterprise-grade scope. HOW I WORK * Discovery call (free, 30 min) — your workflow, bottlenecks, stack * Architecture proposal — written scope, not a verbal estimate * Build with weekly demos — staging from day one * Launch with documentation and video walkthrough * Ongoing support — most clients stay on retainer CREDENTIALS * Anthropic Claude Partner Network * Make Platinum Partner & Community Leader * 15 years software engineering & process architecture * Ex-Barclays Bloomberg AVP Let's talk if you have a real AI problem and a real budget. I'm not the cheapest — I'm the one you hire when the cheap one didn't work.

  • AI Agent Development
  • n8n
  • Make.com
  • Claude
  • HubSpot
  • HighLevel
  • Airtable
  • API Integration
  • Automated Workflow
  • CRM Automation
  • Business Process Automation
  • Chatbot Development
  • OpenAI API
  • AI Implementation
  • AI Model Integration
  • Conversational AI
  • Retrieval Augmented Generation
  • AI Chatbot
  • Claude 3
  • Claude 3.5 Sonnet

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Don't just take our word for it

What does a DOS specialist do?

A DOS specialist maintains and troubleshoots disk operating systems to keep legacy command-line environments operational. This role focuses on resolving issues within MS-DOS or compatible platforms where modern graphical interfaces cannot run specific business applications. You diagnose boot failures, manage file structures through typed commands, and verify that older software interacts correctly with current hardware emulation layers. Your work preserves access to critical data and workflows that depend on these foundational system architectures.

  • Diagnose and resolve errors in DOS-based environments by analyzing command-line outputs and system logs. You identify conflicts in memory allocation, driver mismatches, or corrupted configuration files that prevent applications from launching. This process requires precise use of utilities like CHKDSK or EDIT to repair disk structures and restore system stability without data loss.
  • Configure and maintain compatibility between legacy DOS applications and modern operating systems or emulation software. You adjust settings in virtual machines or compatibility layers to ensure older programs recognize available hardware resources correctly. This includes mapping virtual drives, managing interrupt requests, and verifying that peripheral devices communicate properly with the DOS kernel during operation.
  • Author technical documentation and support runbooks that guide users through complex command-line procedures. You create step-by-step instructions for routine maintenance tasks, backup processes, and emergency recovery steps specific to the organization’s DOS setup. These documents help non-technical staff execute necessary commands accurately and reduce dependency on direct specialist intervention for minor issues.

How to hire a DOS specialist on Upwork

Step 1: Post a job

Define your legacy system requirements clearly to attract candidates who understand disk operating systems. The Job Post Generator powered by Uma™, Upwork's Mindful AI drafts a tailored post when you describe your needs in a few sentences. You can write a new post, update a saved draft, or reuse an existing post to start your search.

  • Specify the exact DOS version and hardware environment so applicants know if their experience matches your setup.
  • List required command-line utilities and batch scripting skills to filter for technical precision.
  • Describe any emulation layers or compatibility tools your team uses to run legacy applications.

Step 2: Evaluate candidates

Look for proof of hands-on troubleshooting in text-based interfaces rather than modern graphical environments. Uma runs instant video interviews and builds shortlists with side-by-side comparisons to help you spot these signals quickly.

  • Review portfolios for documentation that explains complex CLI workflows or legacy system repairs.
  • Check work history for projects involving boot media creation or low-level system diagnostics.
  • Prioritize freelancers who demonstrate clear writing in their support runbooks and technical guides.

Step 3: Interview your top choices

Focus your conversation on specific command sequences and diagnostic logic used in DOS environments. Schedule and conduct interviews within Upwork Messages to receive an immediate transcript and summary after each session.

  • Ask how they diagnose boot failures or resolve conflicts between legacy software and host systems.
  • Discuss their approach to maintaining operability for critical business functions running on older platforms.
  • Request examples of how they document solutions for future reference by other IT staff members.

Step 4: Agree on scope and begin work

Set clear milestones for system stabilization or documentation updates before work begins. Use Upwork Messages and the contract workroom for communication and project management, plus identity verification, payment protection, hourly tracking, and project funds for security.

  • Define deliverables such as updated support runbooks or verified compatibility notes for specific applications.
  • Agree on response times for urgent troubleshooting requests during peak operational hours.
  • Establish criteria for successful issue resolution, such as restored application access or stable boot processes.

Upwork is not affiliated with and does not sponsor or endorse any of the tools or services discussed in this article. These tools and services are provided only as potential options, and each reader and company should take the time needed to adequately analyze and determine the tools or services that would best fit their specific needs and situation.

The rates and information provided in this article are based on current data and industry sources available at the time of publication. Freelance rates can vary depending on factors such as experience, location, project scope, and market conditions. Readers are encouraged to conduct their own research to confirm current rates and trends, as this information may change over time.

How much does hiring a DOS specialist cost?

Hiring a DOS specialist typically costs $500-$1,500 per project, depending on scope and experience. Final pricing depends on the complexity of legacy system troubleshooting, required documentation updates, compatibility verification needs, and the freelancer's depth of command-line expertise.

Legacy system audit

$500-$1,000/project

Entry-level to mid-level
  • Inventory of current DOS environment status and risks
  • Verification of legacy application operability
  • Steps for maintenance or migration support

Command-line troubleshooting

$1,000-$2,000/project

Mid-level
  • Root cause analysis of DOS workflow failures
  • Applied fixes to restore system operability
  • Confirmation of resolved errors and stable performance

Support documentation update

$2,000-$3,500/project

Mid-level to senior-level
  • Step-by-step guides for DOS command-line tasks
  • Updated technical standards for IT continuity
  • Instructions for running legacy DOS applications

Environment configuration

$3,500-$6,000/project

Senior-level
  • Configuration of DOS-compatible interfaces and tools
  • Creation of verified boot disks for recovery scenarios
  • Validation of DOS operations within broader IT systems

Legacy migration support

$6,000-$10,000/project

Expert-level
  • Plan for transitioning DOS workflows to modern platforms
  • Secure retrieval of data from legacy DOS file systems
  • Final verification of system continuity post-migration

Frequently asked questions

Is hiring a DOS specialist worth it?

For most businesses, yes: hiring a DOS specialist is worthwhile. These experts maintain legacy systems that still drive critical operations in manufacturing, logistics, or finance. They resolve command-line errors and keep older hardware functional without requiring a full system migration.

How do I evaluate DOS specialist candidates?

Evaluate candidates by asking them to describe how they troubleshoot boot failures or driver conflicts in a pure DOS environment. Look for specific examples of maintaining batch files or configuring config.sys and autoexec.bat to optimize memory usage. Strong candidates demonstrate comfort with text-based interfaces and legacy hardware constraints.

What tasks does a DOS specialist handle daily?

A DOS specialist diagnoses command-line errors, manages boot media, and updates technical documentation for legacy workflows. They also verify that older applications run correctly within emulation layers or on original hardware.

Can a DOS specialist work with modern operating systems?

Yes, many DOS specialists configure compatibility modes or virtual machines to run legacy software on Windows or Linux platforms. They bridge the gap between old disk operating systems and current IT infrastructure.