When you present tenants, visitors, and clients with a safe and clean building – and when employees are attentive and dressed well – you build trust in yourself, your abilities, and your facility. Trust GSS to help you put your best foot forward, always.
Little details leave
Ground level services are key to the smooth operation of a building and so at GSS we take tremendous pride in delivering those services reliably and well.
We know you struggle to juggle multiple moving parts every day. That’s why we’re on a mission to ensure our services are predictable, reliable, and run like clockwork.
From humble beginnings
to property partners.
GSS got its start in 2007 as a security firm serving local businesses and buildings. We soon earned a sterling reputation for pleasant, professional, and reliable teams, and our business grew. Today, we’re a robust facility service provider with local teams in New York, New Jersey, Connecticut, Pennsylvania, Florida.
Our commitment to our clients is legendary. We’re so much more than just ‘service providers’: we’re your reliable, fast-moving, and responsive partner, here to help you manage your facility more efficiently.
Experience can’t be taught.
We’ve earned ours.
Our executive team has over a decade of experience owning, managing, and operating buildings across multiple sectors.
Complex, Detailed Knowledge
We’re adept at navigating the ins-and-outs of all regulations and compliance standards, including 421-tax abatement and wage control.
Each industry has its own regulations, needs, and nuances. We understand them all because we’ve worked in them all.
Teams in 5 states
- and growing
Rosario MejiaView bio
As an Area Manager, Rosario manages day-to-day operations for our concierge, security and janitorial services in FL.
Moshe ColinView bio
Raymond BurksView bio
With a strong background in marketing, sales and communication in food/beverage and hospitality, Ray brings over 7 years of experience to our Marketing Department.
As the Marketing Coordinator, Ray develops and implements all marketing efforts for every facet of the company. From managing the website, distributing email marketing, maintaining our social media platforms, designing collateral/proposals and planning trade show/sponsorship events, Ray ensures all of our branding needs are taken care of and in alignment with the goals of GSS.
Joseph RosenbaumView bio
Sruly WachsView bio
Mattis BergerView bio
As GSS’s CFO Mattis is responsible for overseeing the financial operations and making decisions based on the company’s financial stability.
His duties include monitoring cash flow, meeting with the CEO to discuss the best practices for company finances and coming up with strategic plans to improve the company’s overall financial health. He is also responsible for managing accounting procedures, identifying investment opportunities and managing mergers and acquisitions.
Ben BaschView bio
Ben has over 26-years of experience in residential aquatics and facilities services. He has had great success in developing strategies that have increased sales and customer satisfaction.
As our Business Development Manager, Ben works to establish and develop our client portfolio by maintaining current client relationships and identifying areas for potential clients. Ben contacts potential clients to establish a business relationship with them, researches the latest updates in that company’s industry, creates new opportunities to expand business and collaborates with sales team to ensure requirements are met, such as sales numbers and profit goals.
Isaac WeissView bio
Isaac Weiss is the co-founder and CEO of GSS. Isaac is constantly looking for new ways to increase customer satisfaction and drive profitability.
As a master of all trades, with over 16 years in the services industry, Isaac has led GSS to expand significantly; providing services for more than 250 buildings including apartments, condominium residences, hotels, schools and hospitals and has earned a sterling reputation for pleasant, professional, and reliable teams.
Abe GrunhutView bio
Abe is the Co-Founder and President of GSS. His focus is to lead the organization by updating and revising plans to increase the company’s profitability and progress. He establishes short and long-term goals and manages budgets to ensure all departments meet their goals and so that resources are allocated properly.
Abe maintains relationships with the community and industry leaders to encourage business investments by looking for alliances, mergers, partnerships, and investment opportunities.
Mayer LeibovitzView bio
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.
He is responsible for overseeing financial statements like balance sheets, invoices, accounts payable and accounts receivable. He directs the accounting team and department operations, compiles financial documents such as business reports, financial forecasts and statements to understand the financial state of business and implements policies and procedures for financial reporting. Mayer assists management with important financial decisions, determines ways to reduce costs and keep up-to-date on the financial market to understand how to maximize profits and find new expansion areas.
Chany BernatView bio
As COO, Chany’s expertise is in the day-to-day management of the company where she ensures that all departments are working seamlessly together to keep operations on track. She is naturally solution-focused, leaving our clients confident that any problem can be rectified swiftly. As a trusted advisor, she has a hand in curating the perfect facility staffing plan for your property.
With years of experience, a keen sense for collaboration and high levels of leadership, Chany keeps all moving parts of our organization (and yours) running smoothly.
Itsy MaytasView bio
Beloved by clients and the GSS team alike, Itsy is the driving force behind GSS’s growth and direction. He combines a background in the construction and cleaning industry with an attention to detail and quality standards. Itsy handles every client from acquisition to negotiation and beyond with care, transparency and attentiveness.
His principal responsibilities are attracting new clients by innovating and overseeing the sales process for the business, identifying and researching opportunities that come up in new and existing markets, and communicating with clients to understand their needs and offer solutions to their problems. He ensures excellent customer service through regular client follow up, liaising with colleagues to develop sales and marketing strategies, developing quotes and proposals for prospective clients.
Jonathan KesslerView bio
As EVP, Jonathan has driven strategic business initiatives, encourages business innovation, increases efficiency and supports client relations for maximized communication and understanding of their needs in our company. His responsibilities include increasing operating income, operational execution, strategic planning and marketing from an executive level.
With more than 25 years of experience in operations, sales and marketing, he understands each area and a productive working relationship plays a fundamental role in the success of a company, which is why he prioritizes supporting a team culture that allows us to provide superior service with passion.
Karen PrietoView bio
Karen started with GSS in 2017 as an Area Manager for our Janitorial division and has quickly rose through the ranks to Director of Janitorial. Karen brings over 10 years of management and cleaning experience. She is responsible for the profitability, service delivery, retention and maintenance of all accounts– providing high-quality service to clients while delivering daily operational functions by overseeing day-to-day janitorial operations for commercial and corporate offices, hotels, condominiums and apartment buildings.
Karen is proficient in keeping her crew running like clockwork, handling issues proactively, and ensuring the GSS standard of perfection is not just met, but exceeded, daily. She is a master at managing budgets, driving new business growth, ensuring fulfillment of contractual obligations, and training managers and supervisors.
Jenny CabaView bio
Efficient, dedicated, motivated professional with over 5 years of management experience as Director of Operations and Area Manager and over 10 years of leadership experience in retail, banking, concierge services, customer service, sales, operations and training.
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 and managing the entire team. She adapts well to all work environments and changes and has a positive attitude allows her to work well with all members of a team.
She is a passionate problem solver who can work well under pressure. Leadership is her second nature.
Nick OrenView bio
An experienced Executive Director with a 100% commitment to customer service excellence, Nick formulates strategy, procures material and resources and secures compliance. Nick always finds ways to increase the quality of customer service and implement best practices across all levels.
He is our star in the Florida Region who builds solid relationships with customers, vendors and distributors, as well as directing marketing efforts by suggesting strategies to expand market research and prepares all documentation required for proposal requests.
Nick is recognized by corporate for problem-solving, his organizational skills and delivering a high level of support to clients and leadership alike.
Yudi BegunView bio
With meticulousness and efficiency, Yudi manages the complex task of payroll for each of the company’s hundreds of employees by checking the number of hours employees have worked, calculating pay raises, shift payments and overtime compensation, deducting tax and insurance payments, resolving issues employees have with timesheets, pay slips and other payroll matters, shift payments and overtime compensation and collaborating with the human resources department to maintain employee data.
Yudi’s unique ability to untangle the details and deliver payroll on time each week is appreciated company wide. He is working knowledge of payroll software, strong organizational and time management skills. He has attention to detail and strong numeracy skills.
Natalie GonzalezView bio
As Payroll Assistant, Natalie works hand-in-hand with GSS’s Payroll administrator, Yudi Begun. Her principal responsibility is to maintain payroll information by calculating and entering data correct data of our employee’s time sheets. She finalizes and submits monthly reports. Natalie is a good team worker since she revolves payroll discrepancies and answer any employee payroll queries.
Natalie has strong computer skills such as typing, system and software knowledge, ability to multitask in a stressful environment with specific deadlines and she is an effective team player.
Jojaira AriasView bio
As the Human Resources Manager, JoJaira plays a critical role in supporting the operations team, the executive team as well as all the employees in the organization.
JoJaira is a United States Army Veteran that comes with 10+ years of experience in management and 5 years in Human Resources. With her Sociology degree, from Hunter College, she comes with a strong background of understanding, working, and managing employee issues.
She is effectively and efficiently managing the day-to-day functions of the HR department, which consist of, but limited to, employee benefit enrollments, recruiting, creating, and implementing onboarding programs, employee relations, problem resolution, and risk management, while also ensuring the organization remains up to date and compliant with State and Federal laws. With her skills and experience, she has successfully proven to not just streamline processes in ways to make them more effective, but she has also proven to be a leader.
Paula RamirezView bio
As Administrative Officer, Paula manages the daily tasks of the company by providing administrative and clerical support to our COO and our HR Manager to ensure our operations run as efficiently as possible. Her responsibilities include ensuring office supplies are prepare services proposals, budgets and costings, maintained, including checking inventory and working with vendors to ensure adequate levels of necessary supplies at all times, collaborate with other administrators and support personnel, management and clients on a regular basis, assist employees with the onboarding, Manage I-9, employment and Health benefits verifications.
Paula has strong organization time management and scheduling skills. She has a long experience with office management software like MS Office (MS Excel and MS Word, MS Publisher, MS PowerPoint), Excel Force and QuickBooks. Paula has a bachelor’s degree in Economic Sciences.
Avi GreenbaumView bio
In his capacity as GSS AR Administrator, Avi works hand-in-hand with GSS’s financial controller Mayer Leibovitz. His primary responsibilities include maintaining the billing system by updating, revising, monitoring, and processing the accounts receivables company-wide, generating invoices and account statements, securing revenue by verifying and posting receipts, resolving any discrepancies, producing monthly financial and management reports and assisting in general financial management and analysis.
Avi has ability to prioritize and manage expectations, an ability to work independently, a keen eye for detail and communications skills to collect the payments from clients and customers.
Shira Levy-HaimView bio
As administrative officer, Shira works hand-in-hand with GSS’s COO and EVP to ensure efficient operations of the company. She oversees operations across the office and manages various administrative projects. Her responsibilities include communicating with company vendors, managers, and supervisors; generating costings; providing support to the marketing team; handling legal affairs; and managing the company software program.
Shira has a Bachelor’s degree in Social Sciences.
Usher GrossView bio
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, monitoring, and processing the accounts payables company-wide, Organize and prepare the documents for bank account transfers, keep an eye on cash balance of checking accounts so that cash is not getting short, organize and file bank activity backup, respond to account balance confirmation from customers/vendors, preparing general statements for customers and issuing receiving, disbursement, journal, sales, and purchasing slips.
His knowledge and skills are MS Office, excellent organizational and mathematical skills, ability to prioritize multiple projects, ability to meet deadlines, excellent oral and written communication skills.
Sol BerkovitzView bio
As AR assistant Sol is responsible for create invoices according to company practices, submitted invoices to customers, maintained and updated customer files including name or address changes, mergers, or mailing attentions, drafted correspondence for standard past-due accounts and collections, identifies delinquent accounts by reviewing files, and contacts delinquent accountholders to request payment and researched customer discrepancies and past-due amounts with the assistance of the Collections Manager and other staff.
Sol has 5 years of diverse experience and track record of positive outcomes, including significant increases in efficiency, quality, productivity, budget performance, and effectiveness. He is a computer proficient; experience using MS Office and QuickBooks.
Henry RodriguezView bio
As Concierge Area manager, Henry is responsible for manage and lead operations of 20+ buildings in New York State. Henry focuses on train and coach concierge staff in customer service and handles escalated customer services issues as needed making day-to-day decisions. He monitors staff scheduling and shifts and keeps improving approachable and professional image in personal appearance according with client standards.
Within over 5 years of experience, Henry 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.
Sylvia KendrickView bio
With dedication, versatility, self-motivation, critical thinking and emotional intelligence skills, Syvia manage concierge and security team in New Jersey and Pennsylvania Region. She has 6+ year of experience as concierge and administration employee and 4+ years of experience managing people.
Sylvia’s principal responsibilities are assigning team members with tasks based on their talents, maintaining trusting relationships with clients/tenants, uphold promises made to clients and training coaching scheduling staff ensuring our teams are meaning company standards and following policies.
Damaso MedranoView bio
As the overnight area manager for GSS, Damaso is an industry professional with 7 years of successful experience in employee management. Responsible for hiring and scheduling overnight employees for more than 20 sites located across the 5 boroughs.
Daily site visits ensure everyone is being held accountable to company standards while reinforcing teamwork, communication, and protocol to maintain a level of performance that is consistent across the board. 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.
Juan RuizView bio
As Janitorial Manager of Janitorial Division, Juan is in charge of ensure that the janitorial staff’s day-to-day cleaning operations are completed in a timely manner, supervise cleaning quality of our customers buildings, and training and schedule new employes. Juan also keeps focus taking inventory of all cleaning supplies and equipment and informing management when supplies are depleted and maintaining safety and health regulations at all client sites.
Juan has over 4 years of experience supervising, handling and training employees in both cleaning and electricity industries. He is strong ethic worker and a highly motivated professional with excellent communication, listening, and inter-personal skills.
Jay PerezView bio
As area manager, Jay is responsible for managing all day-to-day operations on the field related to clients and security staff, overseeing Shelters, commercial operations, staffing and management. Jay has delivered excellent services to the New Jersey and New York market clients, exceeding GSS’s and clients’ expectations on a daily basis.
You can recognize Jay for being well calculated decision maker, professional and mentoring. With in over 20 years of experience managing and a vast network of skilled experts to call upon, he can always be relied on to find the perfect team for the job on the shortest of notice.
Daniela GarciaView bio
As Operational manager in Janitorial Division, Daniela is responsible for coordinating, directing, leading, guiding, and managing New York and New Jersey area day to day operation of ensuring all facilities are maintained to customer’s expectations. She resolves issues with clients, knows janitorial supplies and equipment and proper processes and teach supervisors to do the same.
Daniela is a great leadership ability to coach, lead and develop a team. She has ability to prioritize and manage multiple tasks while meeting deadlines, possess strong analytical, problem-solving and time management skills, the ability to motivate and support staff and a strong administrative and organization abilities. She maintains the company reputation of integrity by honesty, trust, and excellent service.
Kelly RodriguezView bio
Organized, detail and results-oriented, strong critical and analytical mindset, Kelly manages the day-to-day operations of the security and concierge division in New York Division. She trains her employees to greet and assist tenants/clients with their requests and give them her knowledge of the services and amenities available to guests to help them feel at home, ensure the security of the building and the safety of tenants/guests, and overall guest experience details.
Kelly’s 15+ years of experience in finance with focus on Operations, her proactive approach to problem solving and vigorous leadership skills allow her to look for perfection all the while developing the strengths of each employee to exceed client expectations.
Kelly has a B.S in Liberal Arts – Psychology with a minor in Business Administration from C.U.N.Y Medgar Evers College (2006). Kelly Has an impeccable eye for detail to ensure accuracy and efficiency.
Reymond HidalgoView bio
Reymond began his Janitorial experience 8 years ago and started working with GSS back in 2018 as a Lead porter in different type of buildings. Later, due to his enthusiasm, focus, leadership, and attention to detail, he became in Area Manager in 2022. As area manager, he manages a team of cleaners at client locations, assigns cleaning jobs to workers based on their skills and inspecting completed work to ensure it meets the standards set by the client.
He has been characterized by his ability to train, fast learner, communication skills and for exceed GSS’s and client’s standards.
Quadir LewisView bio
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.
His responsibilities include provides on-site leadership for the security personnel assigned to the facilities, the hiring, supervision, training, scheduling, and development of all shift supervisors and security guard assigned, performance of all internal programs, policies, and reporting, maintaining communication and protocols that provide a productive client relationship. He also maintains all patrol/fleet vehicles and equipment utilized in the performance of the security function on the site, and perform initiatives of emergency response, and other tasks required by management.
Quadir has associate degree at BMCC For business management and over 15 years of industry experience.
Loreli AndradeView bio
As Janitorial Area Manager, Loreli is responsible for managing and working with staff to ensure GSS guidelines are followed. Her focus is overseeing daily operations, leading and implementing cleaning standards and best practices, overseeing frontline cleaning services, ensuring all equipment is properly maintained and Maintaining safety and wellness initiatives and procedures are effectively followed by all things. She stands out for her experience in floor care, sanitation and disinfection, general office cleaning, construction site cleaning.
Loreli has a great ability to solve problems and manage time well. She is organized, proactive, self-disciplined, hardworking, attentive and constant. She is able to handle complexity.
Alina DominguezView bio
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.
Motty OlielView bio
As a periodical worker Manager, Motty manage day-to-day operations by organized and detail oriented.
Esperanza NunezView bio
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.