Sterling Back Office is the back-office practice of Global Excellence Consulting Group Inc. — a US company in McLean, Virginia. We run the functions that keep a business alive, so the people who own it can get back to running it.
The pattern we kept seeing was always the same. A bookkeeper here. A biller there. An agency somewhere else. None of them talking to each other, all of them invoicing, and nobody accountable for the whole picture.
Money rarely leaves a business dramatically. It leaks — in the deduction nobody caught, the claim nobody reworked, the invoice that aged past collectible, the close that lands three weeks late and turns every decision into a guess. Sterling exists to put one accountable partner across all of it.
120 years of combined experience — Big 4 audit, US HR, healthcare revenue cycle, enterprise IT delivery and quality systems. Every engagement has a director accountable for it and a named point of contact who answers on your business hours.
With 30 years in quality systems and governance, Anwar sets the standard every Sterling engagement is held to. He spent nearly 19 of them at General Motors as a supplier-quality engineer and ISO 9001 lead auditor — his audit team earned GM’s “People Make Quality Happen” award — and has led GECG, Sterling’s US parent, since 2017.
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Mohsin built Sterling around the service he spent 22 years delivering. As Head of Client Services at Accountimize he ran full-charge bookkeeping, virtual-CFO and tax compliance for US and Canadian clients, then led FP&A at Forte Healthcare. He has filed with the IRS, CRA, HMRC and the UAE FTA.
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Mariyam makes sure the people behind your work are the right people — and runs the HR you can hand to us. She brings 18 years in US HR, from ADP payroll and benefits to EEO-1, AAP and Form 5500 compliance, at Daon, Science Group, Tecknomic and LinkVisum. PHR-certified and based in Washington DC.
LinkedInService-line directors
Your books are reviewed to audit standard — by someone who has spent 15 years auditing and reporting on them. Hasan is a CPA and ICAEW Chartered Accountant who led audits at KPMG, EY and Azets under IFRS and UK GAAP before moving into finance business partnering. He sets the review standard behind every Sterling close.
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Ahsan makes sure the work lands on time, every time. He has 10+ years running operations teams in the UK, Australia and Pakistan — most recently business operations at 10Pearls and operations delivery at the TASDEEQ credit bureau — after starting in accounts receivable and billing. He runs Sterling’s billing workflow, turnaround and SLAs.
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Umair is the reason claims go out clean. He has 7+ years hands-on in the US healthcare revenue cycle — supervising a billing and coding department, auditing Medicare quality measures for Texas ACO physicians, and HCC risk-adjustment coding with provider education. He owns coding accuracy, payer rules and denial work at Sterling.
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Ali turns hours of manual work into automations that run safely on their own. He leads delivery on the University of East London’s £19m automation programme — 16+ automations live, 1,000+ hours removed — has led generative-AI delivery for NHS practices, and brings 15+ years delivering for HMRC, Nationwide and HSBC.
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Shahvaiz leads Sterling’s digital marketing — campaigns, landing pages and content — so your growth work looks as credible as the numbers behind it. Designing brands since 2020, he is Assistant Design Manager at Sveston Watches and has created work for Vrexx, RAPTR Games and Letscodify.
LinkedInSterling Back Office is a division and trading name of Global Excellence Consulting Group Inc., founded by Mariyam Khan and Mohsin Mustafa.
We treat it that way. Here's exactly how the engagement is governed and how your data is handled.
Your engagement is contracted through Global Excellence Consulting Group Inc. in McLean, Virginia, under a formal written agreement signed before a single credential is shared. You have a US contract, US recourse, and a named point of contact who answers on your business hours.
QuickBooks Online Advanced Certified ProAdvisor · Xero Certified Advisor
Data flows in from the systems you already use — read-only wherever possible.
The repetitive volume categorized, matched and flagged at a speed no manual team can match.
A qualified professional works every exception and corrects what the machine got wrong.
A named senior reviewer approves. There is always one person accountable.
Delivered on a fixed calendar, with commentary in plain English.
Sterling Back Office is a trading name of Global Excellence Consulting Group Inc. (“GECG”), incorporated in the United States with offices at 1660 International Drive, Suite 600, McLean, Virginia 22102. All engagements are contracted through the US entity.
Book a free review. For most businesses that starts with your last 90 days of books. We'll tell you where you stand and what we'd do about it — including if the honest answer is that you don't need us.
One partnerOne accountable owner