Greenbaum Stiers Strategic Marketing Group

Greenbaum Stiers Strategic Marketing Group (GSM) is a marketing agency headquartered in Columbus, Ohio. It works mainly with contractors, non-profits and local businesses, with a particular focus on home service companies that need web design, search, advertising and lead generation handled by one team.

The agency describes a KPI-driven approach: a strategy conversation, a clear roadmap, and a team of specialists assembled for execution. It reports managing more than $1 million in monthly advertising spend and says its people have 40+ years of combined experience. Mike Stiers and Anthony Brown host a podcast and community called The Contractors' Edge, and GSM offers a Home Services Industry KPI Calculator.

• Web design and SEO
• Digital advertising: Google Ads, Local Service Ads, connected TV, display and paid social
• Design and branding
• Media planning and buying
• Strategy and consulting: growth planning, KPI reviews and operational consulting
• Analysis and reporting and social media marketing
• LEAD Program: an integrated system combining prospecting, retargeting, direct mail, online video, CRM reactivation, display and connected TV

Examples on the site include a waterproofing and foundation repair company whose $5,000 monthly LEAD campaign is reported to have produced three directly attributed sales and $26,250 in attributed revenue, and a 2024 rebrand for Pet Heaven Cemetery and Cremation covering logo, icons and collateral. Supreme Foundation Repair, Stapleton Foundation Systems and Clean Extreme appear in client testimonials.

According to its website, GSM is a Google Premier Partner for 2026 and says its in-house team ranks in the top 3% of U.S. agencies for Google Ads. It also displays Clutch badges from 2024 for digital marketing, SEO, web design and advertising in Columbus and Ohio, and 50PROS badges including a Global Leader Top 10 2026 listing. The agency is located at 2550 Corporate Exchange Drive, Suite 324, Columbus.