Mark Marar
Colorado Field Services Manager
Results-driven sales leader with a proven track record in strategic planning, team management, and operations. With a career spanning various industries, I’ve consistently aligned business objectives with effective leadership to drive growth and achieve operational excellence.
My expertise lies in B2B sales, cross-functional collaboration, and consultative selling. I thrive on building strong customer relationships, overseeing key projects, and executing sales strategies that deliver results. As a dedicated professional with a passion for achieving targets and fostering innovation, I bring a keen eye for detail, exceptional communication skills, and a commitment to driving success.











What They’re Saying
Featured Articles
Why Property Managers Must Keep Backup Generators Well-Maintained
Key Takeaways by: Mark Marar | Colorado Field Services Managerappears in: The Colorado Real Estate Jounal – April,…
The Most Common Generator Service Issues We See In the Field
Key Takeaways by: Mark Marar | Colorado Field Services Manager Our field service teams frequently encounter preventable …
Prevent Outage Crises With Power Automations
Key Takeaways by: Mark Marar | Colorado Field Services Manager For property managers, a power outage is more than a nuis…
Addressing Voltage Switch (ATS) Issues in Generator Operation
Key Takeaways by: Mark Marar | Colorado Field Services Manager As 2025 unfolds, Generator Source is seeing more generato…
Generator Field Services
Advanced Upgrades and Custom Solutions
Generator Source goes beyond basic service by offering a wide range of custom generator solutions and upgrades to meet your specific power needs. Our engineers and electricians can reconfigure and modernize your power system, including:

Schedule Service
Whether you need expert generator service, preventative maintenance, or are exploring rental options, we’re here to help.
Send us a message, and our team will get back to you promptly.

Quality Assurance
Our Techs are EGSA Certified
Our certified EGSA technicians deliver exceptional, hands-on expertise that our customers rely on.
Standard Tests
- Battery Voltage (12 or 24 Volt)
- Check Air Filter
- Check Barrel Leads (Insul. Tightness)
- Check Battery Cables
- Check Battery Charger
- Check Block Heater
- Check Coolant (Full & Protected for Temp)
- Check Fan Belts
- Check Fuel Rack
- Check Oil & Condition
- Cold Water Leaks
- Fuel Pumped Out of Tank
- Grease Gen Bearing
- Missing Belts
- Remote Start Connection (Locate, Test & Tag)
- Remove Remote Wires
- Tighten All Term Screws
- Tighten Hose Clamps
- Turn Engine for 2 Full Rounds
- Voltage Check
Load Bank Tests
- Accurate Temperature Gauge Test
- Auto Start Test & Tag Verifications
- Check Temperature with Heat Gun
- Coolant Leaks
- Engine Alternator Test
- Full Rating Tests
- Gauge Adjustment Tests
- Gauge Compliance Tests
- Oil Leaks
- Pre-Alarm Verification
- Shut Down Verification

Find Your Service Area
Still have questions or looking for more information?
Generator Source specializes in low-hour, used, new, and surplus generator sets. We have a wide variety of generator sizes and models to fit any project. We are not a broker, we own what we sell.
Call us today (877-866-6895) or click Contact Us to be connected with one of our experienced sales reps.
We have 350+ generators in stock and ready to ship!
