How she shines: Karina Villaseñor, Vice President of Human Resources at 4M Building Solutions, is an influential woman in cleaning because she has spent her career making sure the people who power our industry are seen, supported, and given a path forward.
Leadership: Since entering the cleaning industry in 2007, Karina has guided 4M through extraordinary growth. She led the cultural and operational integration of 31 acquisitions in 19 years, more than doubling the company's headcount. Her "culture-first" onboarding program standardized payroll and benefits while keeping each acquired company's identity. It delivered zero unexpected voluntary turnover in the first year after close and a 90 percent onboarding satisfaction rating. Today, she oversees HR for more than 7,000 team members across 4M's nationwide footprint.
Technology: Karina designed a unified HR technology stack that reduced administrative overhead. She also implemented a unified Performance Management System that cut time spent on performance cycles by 40 percent. She is now exploring how AI can personalize the employee journey, from customized onboarding to predicting turnover before it happens.
Community: Karina is a passionate advocate for Hispanic professionals, who make up nearly 70 percent of the frontline cleaning workforce. She has championed ISSA's VEO initiative since its start and received the 2025 VEO Visionario Award. In 2026, she followed up her Visionario win to return as conference co-host, and she also spoke at the conference. Her visibility shows emerging Hispanic leaders what is possible.
Teamwork: Karina builds culture collaboratively. When inconsistent evaluations across acquired companies eroded trust in promotions, she brought leaders from every entity together to create a transparent, competency-based framework. The result was a 20 percent increase in voluntary peer-to-peer feedback and a significant improvement in perceived fairness. She also launched a peer recognition platform anchored in 4M's core values and quarterly "Ask Me Anything" sessions that connect leadership with newly integrated teams.
Development: Karina believes in growing talent from within. Through 4M University, she champions Lead 360 for hourly team members and Lead 360 Management for developing managers—each are 14-week programs using BSCAI modules, 4M best practices, and weekly meetings. She also supports individualized career coaching that gives every team member a clear growth path. Her own journey, from industry newcomer to VP and national award winner, reflects the same commitment to growth she offers others.
Karina's influence goes well beyond one company. She calls cleaning "la industria de la gente," the people's industry, and she has proven that investing in people is the strongest business strategy there is. A working mother of three and a bilingual leader, she is a role model for women and Hispanic professionals across our industry.
She deserves to be recognized as an Influential Woman in Cleaning.
Years in the industry: 19 years
Job responsibilities: Head of 4M Building Solutions HR Department
Career path: Karina started as an assistant to 4M's Sales VP, and then President, before taking over the HR department for a growing company.
Best advice received: Stay the course. Work hard. And empower your people.
Fun fact: Most don't know how hard Karina works beyond the normal 8 to 5. She never turns down a phone call or a request.