Efficiency starts
from the ground up

Isaac Weiss is the co-founder and CEO of GSS. An energetic problem-solver by nature, Isaac motivates, inspires, supports, and guides the team in getting the impossible done. 

As President of GSS, Abe Grunhut is the backbone of the firm, ensuring all processes operate like clockwork. Under his strong leadership, GSS has continuously expanded its services and achieved year-over-year profitability.

As COO,  Chany Bernat is responsible for the day-to-day management of the company and its field teams. From overseeing billing, to handling client concerns, with Chany at the helm, all moving parts keep running smoothly.

The ultimate numbers man, Mayer Leibovitz knows every company number cold. His careful oversight and strategic decisions continuously aid the company in achieving measurable and efficient profit margins. 

Beloved by clients and team alike, Itys Matyas is the driving force behind GSS’s growth and direction. He handles every client big and small, from acquisition to negotiation and beyond with care, transparency, and attentiveness.

 Since joining GSS, Jenny has been instrumental in developing a winning team, deftly operating our robust security and concierge division. From ensuring clients are not just satisfied, but thrilled, to overseeing the entire team from management to crew, leadership is her second nature. 

 As Director of Janitorial, Karen is proficient in keeping her crew running like clockwork, handling issues proactively, and in ensuring the GSS standard of perfection is not just met, but exceeded, daily. 

As Office Manager, Ranaldo brings years of experience from the public and private sectors, overseeing and working closely with human resources, accounts payables, accounts receivables, and assisting the COO with various day-to-day operations. Ranaldo’s meticulous attention to detail and strong leadership skills ensures our operations are running efficiently and effectively.

 As head of HR, Jojaira Arias prioritizes the happiness and job satisfaction of the company’s employees – all while ensuring everyone is fully updated and in compliance with local, state, and federal regulations. 

With meticulousness and efficiency, Yudi manages the complex task of payroll for each of the company’s  hundreds of employees. With schedules constantly in flux, Yudi’s unique ability to untangle the details and deliver payroll on time each week is appreciated company-wide.

In his capacity as GSS AR Administrator, Avi works hand-in-hand with GSS’s financial controller Mayer Leibovitz. His primary responsibilities include updating, revising, monitoring, and processing the accounts receivables company-wide.

In his capacity as GSS Accounting & AP Administrator, Usher works hand-in-hand with GSS’s financial controller Mayer Leibovitz. His primary responsibilities include reviewing, revising, monitoring, and processing the accounts payables company-wide.

In her capacity as company Payroll Assistant, Olga works hand-in-hand with GSS’s Payroll administrator Yudi Begun. Her primary responsibilities include assisting with updating, revising, monitoring, and processing the payroll company-wide.

In his capacity as company AR Assistant, Abraham works hand-in-hand with GSS’s AR administrator Avi Greenbaum. His primary responsibilities include assisting with updating, revising, monitoring, and processing the accounts receivables company-wide.

As Office Administrative Support, Claudia assists with various corporate office responsibilities, where she takes a hands-on approach with a smile, dedication, and meticulous attention to detail.

As our in-house regional training specialist, Esperanza directs, plans, and co-ordinates all employee training programs — ensuring service personnel are following best practices and performing to the impeccable standards GSS is renowned for.

Responsible and hardworking, Damaso Medrano can be relied upon to sweat the small stuff, including setting up our teams and visiting multiple facilities a day to check-in with them, as well as quickly and capably handling the unexpected. 

 Organized and detail-oriented Kelly manages the day-to-day operations of the security and concierge division. Kelly’s analytical mindset and vigorous leadership skills allow her to problem solve to perfection all the while developing the strengths of each employee to exceed client expectations.

Responsible and conscientious, Henry Rodriguez can be relied upon to show up ready, willing, and able to exceed our clients’ expectations. Under his leadership, our employees and clients are thrilled to work with such a dedicated leader.

As Operations Manager of our Security Division, Quadir is Jenny Caba’s right-hand man. Hard-working and unafraid of a challenge, Quadir Lewis is dedicated to executing the GSS vision of perfection and keeping standards high for clients. 

As area manager, Loreli is responsible for managing and working with the crew to upkeep GSS’s renowned standards of cleanliness and safety.

As area manager, Alina is responsible for managing and working with the janitorial crew to super exceed GSS’s renowned standards of cleanliness and safety.

As area manager, Daniela is responsible for managing and working with our world-renowned janitorial crew all while displaying exemplary management skills.

As area manager, Katherin is responsible for managing and working with the janitorial crew to exceed GSS’s and clients’ expectations on a daily basis.

As area manager, Yuri is responsible for managing and working with the route crew team to exceed GSS’s and clients’ expectations on a daily basis. With a vast network of skilled experts to call upon, she can always be relied on to find the perfect team for the job on the shortest of notice.