Top LI Workplaces 2021: The Best Mid-size Businesess

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1. SupplyHouse.com

SupplyHouse.com is an e-commerce site based in Melville that specializes in selling quality plumbing and heating equipment at low prices. It functions as a distributor service for tradespeople or a direct site for one’s personal home needs. The company has a staff of 200 employees that reach a wide range of customers. It promotes a positive company culture with excellent customer service. To learn more, visit supplyhouse.com.

2. Nationwide Mortgage Bankers

Nationwide Mortgage Bankers is a Melville-used mortgage company that prides itself on “demystifying mortgages through transparency, education, and customer support.” Its trusted advisors work to ensure that customers are informed with the necessary information to make the best financial decision for themselves. From 2017 to 2020, NMB experienced over 16,000 percent growth. It has been ranked as the nation’s fastest-growing private mortgage bank for the past two years. To learn more, visit nmbnow.com.

3. Yardi Systems, Inc.

Melville-based Yardi Systems, Inc. was founded in 1984 and has been working to provide real estate businesses with quality property management software and services since its inception. It proudly employs more than 6,000 people throughout North America, Asia, Australia, Europe, and the Middle East. Yardi attributes its longevity to the work put into relationships between employees and customers, but also the relationships amongst employees. For more information, visit yardi.com.

4. Usdan Summer Camp for the Arts

Usdan Summer Camp for the Arts is located in Wheatley Heights, Long Island. The day camp accommodates kids in second through 12th grades for either four- or eight-week sessions. Usdan says “[its] goal is to instill in our community a desire and drive to contribute creatively to the world now and for the rest of their lives.” The camp caters to all types of creative expression, including acting, singing, writing, sculpting, painting, and dancing. To learn more, visit usdan.org.

5. Posillico

Farmingdale-based Posillico is a construction company that was founded in 1946 which serves customers throughout the tri-state area with the help of its staff of more than 400 employees. Posillico provides high quality services on public works projects while providing a quality of life for its employees. In April 2020, Posillico received an Experience Modification Rate of 0.67. The Experience Modification Rate is a metric that insurers use to calculate worker’s compensation premiums. The benchmark average EMR is 1.0. For more information, visit posillicoinc.com.

6. North Atlantic Industries

North Atlantic Industries is a supply company for embedded electronics, power systems, and computing for the world’s leading organizations in military and aerospace applications. Its state-of-the-art manufacturing facility is located in Bohemia, N.Y. For more information, visit naii.com.

7. Renu Contracting & Restoration

Renu Contracting & Restoration is an independent corporation located in Copiague, N.Y. It operates in the nonresidential building construction industry. It specializes in reconstruction, selective demolition, asbestos and lead abatement, and MEPs (mechanical, electrical, and plumbing services). Visit renuny.com.

8. Darby Dental Supply, LLC

Darby Dental Supply is based in Jericho, N.Y. and was ranked in the “top Long Island workplaces” in 2020 by Newsday. The company supplies dental equipment at reasonable prices to dental practitioners throughout the nation. Darby Dental Supply prides itself on providing a high quality of life for employees by ensuring that they feel supported through various wellness initiatives. Visit darbydental.com.

9. Greenman-Pedersen, Inc.

First founded in 1966 in Babylon, Greenman-Pedersen, Inc. was started by three business partners and has since expanded to employ more than 1,500 people and earn in excess of $200 million in annual revenue. First specializing in construction, engineering, and design, the LI-based business has widened its talents to include aerial mapping, water projects, and more. Greenman-Pedersen recognizes that the state of the environment is intertwined with the state of architecture and the quality of human lives. This is why it implements energy-efficient technology in its buildings, uses environmentally friendly resources to repair aging infrastructure, and acts to prevent and minimize damage presented by rising sea levels and extreme weather events. It is also revolutionizing urban planning by taking a people-focused approach that prioritizes pedestrians and public transport and minimizes potential vehicle crashes. Greenman-Pedersen is also employee-owned, which contributes to the company’s entrepreneurial spirit and culture of excellence. To find out more, visit gpinet.com

10. Meadowbrook Financial Mortgage Bankers Corp.

From humble beginnings in the basement of founder and CEO Danny Nicolo, who was voted Best Boss on Long Island three  years in a row by the Bethpage Federal Credit Union’s and Long Island Press’ Best of LI, Meadowbrook Financial Mortgage Bankers Corp. has since expanded across the East Coast and is licensed in 17 states. The company provides home refinancing solutions that are individualized to the client, and is able to adapt to nearly any budget. It offers many options for clients, including a 0 percent down payment mortgage for veterans. Where other mortgage companies prioritize profitability above all, Meadowbrook Financial Mortgage Bankers prides itself on its unwavering commitment to prioritize human relationships both with clients and within the company itself. To learn more, visit mfmbankers.com

11. Grassi Advisors & Accountants

Since its conception in 1980, Grassi Advisors & Accountants has become one of the top 5 largest firms on Long Island and top 100 largest firms in America. This full-service tax, accounting, and business advisory firm has also expanded to locations in Jericho on Long Island, New Jersey, Massachusetts, Florida, Italy, and other locations. Its dedication to financial problem-solving has landed it in the top 25 “Best of the Best Firms” by INSIDE Public Accounting for 12 years. Its motto, “Strength in Certainty,” reflects the company’s drive to make sure its clients have the utmost confidence in the decisions they are making for themselves or their business, especially among unprecedented developments in public health, technology, and regulation. To find out more, visit grassicpas.com

12. Spellman High Voltage Electronics Corp.

Spellman is the world’s leading independent supplier of high-voltage products for medical, industrial, and scientific applications. The Hauppauge company has spent more than 70 years specializing in the design, research, and development of HV power supply technology, and offers the broadest and highest-quality range of products in the industry. With more than 2,100 employees and several design, production, and repair centers across America, Europe, and Asia, Spellman has solidified itself as an international staple of the HV hardware industry. Thanks to its highly skilled design team and dedication to quality control, Spellman’s electrical engineering capabilities are unrivaled. As a fixture in the field of energy, the company understands the importance of sustainability. That’s why Spellman has enacted a corporate recycling program and reduced its average daily electricity and natural gas usages. To learn more, visit spellmanhv.com

13. Rooted Hospitality Group

This award-winning hospitality group owns and manages five successful Long Island restaurants in Suffolk County, including RHUM and AVO TACO. Its goal is to provide restaurant-goers with beautiful locations, good drinks, chef-driven food, and great company. Its attention to service and customer experience has solidified it as an industry leader. Along with its mission of bringing great restaurant experiences to Long Island, it offers its expertise in consultations with other restaurant and hospitality groups in need of advice, and supports initiatives to maintain the beauty of local environments and waterways. To find out more, visit rootedhg.com

14. Heatherwood 

Heatherwood has been committed to developing upscale residential communities since the 1950s. Its beginnings included constructing housing, building more than 5,000 homes across Long Island and two senior communities. It then expanded to include building and managing rental and commercial properties, as well as two golf courses. Heatherwood is dedicated to its craft — the cultivation of luxury housing for Long Island residents. All residential properties they manage are within a comfortable distance of shopping, dining, and entertainment destinations. Its staff provides unmatched service and amenities, which often include fitness centers, saunas, social rooms, pools, tennis courts, and more. Their commitment to providing the most comfortable environment possible for their tenants has earned them seven different awards, including the Top Rated Award from Apartment Ratings. To learn more, visit heatherwood.com.

15 Designatronics Inc.

Since 1950 Designatronics has served as a leading manufacturer of small mechanical components and assemblies for a worldwide customer base. The Hicksville-based company is comprised of three brands: SDP/SI (Stock Drive Products/Sterling Instruments), QTC Metric Gears, and QBC Quality Bearings and Components. Through these brands, Designatronics has established in excess of 15,000 firms worldwide, from Fortune 500 companies to individual inventors. The company has serviced a variety of industries, including aerospace, defense, medical, and the industrial sector, for more than 65 years. Designatronics offers more than 100,000 power transmission components, including gears, belt and chain drives, shafts, bearings, couplings, universal joints, hardware, right angle drives, gearheads and speed reducers, motors, and other miscellaneous components. Online orders and quotes are available on updated e-stores for each brand. For more information, visit designatronics.com.

16. CN Guidance & Counseling Services

As people become more aware of their mental health, many are seeking professional help to better manage their lives. Central Nassau Guidance & Counseling in Hicksville has been servicing Long Islanders with mental health disorders since 1972. The nonprofit organization provides recovery solutions for people living with mental health and substance abuse conditions. Each year, it is estimated that 1 in 5 Long Island residents suffer from some form of mental health disorder, many of which go untreated. CN Guidance & Counseling focuses on a mix of person-centered integrated clinical treatment, counseling, and housing and support services to empower people to live healthy lives. The growth of the organization has been shaped by the ability to fulfill the emerging needs of consumers as they recover. For more information, visit centralnassau.org.

17. Marcum LLP

Founded in 1951, Marcum LLP is a national accounting and advisory services firm focused on helping entrepreneurial companies and high-net-worth individuals achieve their goals. The company offers complete tax, assurance, and advisory services, along with an extensive portfolio of industry-focused practices and specialized expertise. Marcum LLP works to understand the business of a client, to help them identify their business and financial needs, and to provide services that will help them achieve these goals for their business. The organization is committed to providing total consumer satisfaction, investing in the professional training of staff, and maintaining trademark service. From privately held and publicly registered companies to nonprofit and social sector organizations, Marcum LLP provides guidance for all its customers. Visit marcumllp.com for more information.

18. Voxx International Corporation

Voxx is a leading global manufacturer and supplier of automotive and consumer electronics products, as well as innovations for the growing biometrics industry. The company, headquartered in Hauppauge, supplies a diverse customer base, consisting of automotive original equipment manufacturers (OEMs), specialty CE-retailers, mass merchandise and power retailers, 12-volt specialists, and other commercial entities. Voxx holds market-leading positions across many categories within the automotive electronics and consumer accessories segments. The company has produced more than 35 well-known consumer electronics brands in the premium audio and accessories categories, including Klipsch, RCA, Audiovox, Magnat, and more. Voxx also has an array of products under automotive electronics, including the brands Invision, Rosen, and Advent, and the recently acquired brands Automate, Avital, Autostart, Rostra, and many more. Voxx continues to evolve and innovate as technology continues to change. Visit voxxintl.com.  

19. Dental365

Established in 2014, Dental365 works to provide convenient and affordable dental care for the whole family. The organization offers modern, concierge dentistry services from expertly trained specialists and general dental practitioners. With locations throughout Long Island, the New York Metropolitan Area, Connecticut, and New Jersey, as well as online consultations, services have never been more accessible. Dental365 offers hours that are convenient for all patients, including nights and weekends. There are also walk-in appointments available and emergency dental services for those who require them. Offices are completely electronic, allowing Dental365 to work with only quality dental laboratories to craft necessary dental devices with greater control over the finished product. Most major dental insurance plans are accepted, and in-office plans are offered for patients without insurance. For more information, visit godental365.com

20. Concern Housing

Concern Housing is committed to helping individuals and families live in communities with dignity and opportunity by providing housing and support services. As one of the largest nonprofit housing agencies in New York State, the Medford-based organization is currently serving more than 1,000 individuals and families in more than 240 locations. Concern Housing offers a variety of housing options with individualized support services to encourage personal growth and independence. By granting a voice to individuals who are often overlooked, this organization acts as an advocate for those who struggle to find adequate housing. Visit concernhousing.com for more details. 

21. Acutis Diagnostics

With Covid-19 still sweeping the United States, medical diagnostics have become indispensable to ensuring the safety of the public. Based in Hicksville, Acutis is providing peace of mind through specialized medical laboratories, allowing for diagnosis and treatment with greater confidence and ease. Acutis utilizes both hard science and the soft skills of its support teams in order to diagnose patients effectively. The company works to provide expertise and leadership in several fields, including clinical toxicology and infectious disease identification. The organization recently released Acutis Reveal, an infectious disease product line focused on providing more exact ways to identify pathogens quickly, and with more information on response. Acticus is grounded in the most advanced science, technology, and best practices, all delivered by committed professionals. Visit acutis.com for more information.

Compiled by Whitney Lynn, Nicole Formisano, and Katherine Plotas