RENNtech

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RENNtech Since 1989, RENNtech has evolved to be the foremost authority of Mercedes-Benz and luxury vehicle tuning and aftermarket performance products.
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RENNtech has become the premier Mercedes-Benz specialist and Hartmut Feyhl himself is regarded by many as USA’s foremost authority in Mercedes tuning. His vast experience comes from 12 years spent at AMG Germany before serving as the North American division’s Technical Director. Prior to the tuning company’s merger with Mercedes-Benz in 1999, by the request of AMG Germany, Feyhl branched out on his own to start RENNtech and service the existing AMG North America customers. Performance without compromise. This is the foundation upon which we have built our reputation. Established in 1989 by Hartmut Feyhl, RENNtech has evolved and grown from servicing AMG’s customers into the foremost authority on tuning and customizing AMGs and Mercedes-Benz. RENNtech also offers tuning solutions for Porsche, Audi and Bentley vehicles, along with other European luxury cars. Over the years, we have developed high-performance products for virtually all Mercedes-Benz AMG vehicles. Some of the most notable among these are the 200 mph RENNtech E7.4RS (which claimed ‘Fastest Sedan in the World’ honors by Car and Driver Magazine in 1996) and the more recent 945 LB-FT 5.5L V8 Biturbo RENNtech R3+ Monster. Each of these vehicles are just a sampling of what RENNtech has achieved, featuring extreme performance, upgraded aesthetics and a fit and finish that rivals factory vehicles.

10/16/2026

ISO A SR ACCOUNTANT/CONTROLLER

Position Type: Full-Time
Location: STUART, FLORIDA On-site
Reports To: Ownership
Salary: Commensurate with experience

Position Overview

We are seeking an exceptionally accurate, detail-oriented, and experienced Senior Accountant / Controller to oversee and execute all financial operations for our multi-divisional organization. Reporting directly to ownership, you will manage the complete accounting cycle, ensuring all financial records and reporting duties are executed up to financial statements ready for audit control.

The ideal candidate possesses deep experience handling the unique accounting structures of Project Management, Manufacturing, Service, and Sales divisions. Strong ERP experience is a baseline requirement, with specific experience in Acumatica being a highly valued plus.

Key Responsibilities

• Financial Oversight & Reporting: Execute the full accounting cycle, preparing comprehensive, accurate, and timely monthly, quarterly, and annual financial statements ready for external audit.
• Multi-Divisional Accounting: Manage, reconcile, and optimize accounting processes across four distinct business units: Project Management (job costing), Manufacturing (inventory/COGS), Service, and Sales.
• Compliance & Filings: Manage and execute all corporate compliance filings, including sales tax across applicable jurisdictions, payroll administration, 401(k) plan management, and state and federal compliance filings.
• ERP & Technology Optimization: Utilize and maintain our core ERP system to ensure clean data integrity; leverage Acumatica (if applicable) and advanced Excel modeling to optimize financial workflows.
• Ad-Hoc Analysis: Provide ownership with accurate, data-driven financial insights, variance analyses, and cash flow projections to support strategic business decisions.

Qualifications & Requirements

• Experience: Minimum of 5–7+ years of progressive accounting experience, ideally operating as a Senior Accountant, Accounting Manager, or Controller in a multi-divisional environment.
• Divisional Expertise: Demonstrated background in handling job costing, manufacturing inventory, service-cycle billing, and sales-revenue recognition.
• Technical Skills:
• Solid, hands-on experience with robust ERP systems (experience with Acumatica is highly preferred).
• Advanced proficiency in Microsoft Excel (VLOOKUPs, Pivot Tables, advanced formulas) and the Microsoft Office suite.
• Compliance Proficiency: Proven experience accurately managing payroll cycles, sales tax reporting, 401(k) oversight, and standard state/federal business compliance filings.
• Attributes: High level of autonomy, zero-error mindset, absolute integrity, and excellent communication skills when collaborating directly with business owners.

Hiring Requirements

• Professional references required upon request.
• A thorough background check will be conducted as a condition of employment.

Benefits & Compensation

• Competitive salary commensurate with experience.
• Health, Dental, Vision insurance, 401(k) matching, PTO, available.

How to Apply

Please submit your resume and at least three valid employment references along with a brief cover letter outlining your experience with ERP systems (specifically Acumatica, if any) and your background managing manufacturing or project-based accounting, with your salary expectations to [email protected] or to [email protected]

This RENNtech Mercedes-AMG GT C got a complete carbon fiber aero transformation, including:⚡ Carbon Fiber Performance Ho...
10/09/2026

This RENNtech Mercedes-AMG GT C got a complete carbon fiber aero transformation, including:

⚡ Carbon Fiber Performance Hood
⚡ Carbon Fiber Front Splitter
⚡ Carbon Fiber Fender Extractors
⚡ Carbon Fiber Bumperette Delete
⚡ Carbon Fiber Rear Wing

Every component is meticulously engineered to elevate aerodynamic performance, enhance aggressive styling, and deliver the unmistakable RENNtech presence.

No shortcuts. No compromises. Pure RENNtech performance.

Ready to transform your AMG GT? Explore our carbon fiber upgrades and take your build to the next level.

🔗 Shop now at Store.renntechmercedes.com or click the link in our bio

HISTORY WAS MADE  ! Renntech has officially turned into a global automotive tuning powerhouse a narrative defined by the...
10/08/2026

HISTORY WAS MADE ! Renntech has officially turned into a global automotive tuning powerhouse a narrative defined by the exact concepts that its founder, Hartmut Feyhl started 37 years ago …. PERFORMANCE WITHOUT COMPROMISE !

10/06/2026
Just happened yesterday… This is a WORLD RECORD for the highest recorded sale for a RENNtech custom built 1990’s OR ANY ...
10/06/2026

Just happened yesterday… This is a WORLD RECORD for the highest recorded sale for a RENNtech custom built 1990’s OR ANY SL car sold ever at Auction to date!

RENNtech is becoming the brand for collectors around the world and I am so very proud of my husband for the years he has spent in his craft to be recognized amongst the world’s elite collector market!

RENNtech Classic Wheels 🔥
09/30/2026

RENNtech Classic Wheels 🔥

🔥 734 HP. 753 LB-FT. For your AMG SL63/GT63 with the RENNtech Power Module 🔥 Take your Mercedes-AMG SL 63 (R232) or AMG ...
09/28/2026

🔥 734 HP. 753 LB-FT. For your AMG SL63/GT63 with the RENNtech Power Module 🔥 
Take your Mercedes-AMG SL 63 (R232) or AMG GT 63 (C192) to the next level with the RENNtech Power Module (RPM) ECU Upgrade for the 4.0L BiTurbo V8 M177 with EQ Boost and gain up to +106 HP and +87 LB-FT 📈 
Engineered from more than 35 years of RENNtech ECU tuning experience, the RPM optimizes ignition timing, throttle mapping, and air/fuel ratios to deliver stronger horsepower and torque throughout the entire powerband—without sacrificing the refinement your AMG was built for.
🏁 DYNO-TESTED PERFORMANCE
Factory Rating: 577 HP | 590 LB-FT
Dyno Tested Stock: 628 HP | 666 LB-FT
🔥 RENNtech RPM Tuned: 734 HP | 753 LB-FT
📈 Gains: Up to +106 HP | +87 LB-FT
The RPM is housed in a precision CNC-machined 6061 aluminum enclosure and includes pre-labeled wiring and connectors for a clean installation. A supplied bypass allows the module to be removed and the vehicle quickly returned to stock configuration.

Engineered specifically for the Mercedes-AMG 63 Series BiTurbo M157 engine, our 4-piece Carbon Fiber Airbox Kit is manuf...
09/24/2026

Engineered specifically for the Mercedes-AMG 63 Series BiTurbo M157 engine, our 4-piece Carbon Fiber Airbox Kit is manufactured from premium prepreg carbon fiber and paired with flow-optimized turbo inlet tubes designed to increase incoming airflow and maximize engine performance.
🇺🇸 Designed, engineered, and manufactured in the USA using industry-leading materials for exceptional strength, durability, heat resistance, and long-lasting appearance.
⚡ Performance gains up to:
• +10 HP
• +10 LB-FT of torque
Beyond the performance benefits, the full carbon fiber construction transforms the engine bay into a true showpiece—combining motorsport-inspired engineering with an OEM+ finish.
Built for AMG enthusiasts who demand performance without compromising appearance.

Address

7825 SW Ellipse Way
Stuart, FL
34997

Opening Hours

Monday 9am - 6pm
Tuesday 9am - 6pm
Wednesday 9am - 6pm
Thursday 9am - 6pm
Friday 9am - 6pm

Telephone

+15618457888

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