12 Delaware Valley companies have made the Top Workplaces list every year the project has run. Here's a snapshot of those standouts, as excerpted from their survey profiles.

Center For Family Services
Founded: 1920
Take Note: Through more than 60 programs, The Center For Family Services (CFS) touches the lives of thousands of vulnerable children and families each year to prevent those at-risk from becoming victims of child abuse or neglect. With in-home, after-school, school based, and community programs, CFS provides the tools to keep children safe and help families become self-sufficient.

Edmund Optics
Founded: 1942
Headquartered: Barrington, NJ
Local Employees: 205
Take Note: In 1969, the company — then known as Edmund Salvage — supplied optical equipment that traveled to the moon as part of the Apollo 11 spacecraft in its historic lunar landing. In the mid-1980s, Edmund refocused on industrial optics. Today, Edmund products are used in a variety of applications ranging from DNA sequencing to retinal eye scanning to high-speed factory automation.

The Graham Company
The Graham Company, an insurance brokerage and consulting firm, takes employee retention seriously.  If a current employee recommends a candidate who is ultimately hired, they receive a referral bonus of $5,000 to $10,000. As a result of this program, current employees refer 85 percent of Graham's new hires. Additionally, any employee who refers a company that then becomes a client receives a percentage of the first year revenue from that client.

Lincoln Investment
Founded: 1968
Headquartered: Fort Washington, PA
Local Employees: 260
Take Note:  Lincoln Investment is a full-service broker-dealer and registered investment advisor. Representing clients with more than $30 billion in assets, the company is a leading provider of retirement plans to school districts, universities, hospitals and other non-profit and community-based organizations. On average, Lincoln Investment employees have been with the company for almost 10 years.

Mastery Charter Schools
Founded: 2001
Headquartered: Philadelphia
Local Employees: 1,618
Take Note:  Mastery is a non-profit public charter school network currently operating 22 schools in Philadelphia and Camden, serving over 13,500 students in grades K-12.  Sixteen of the schools are turnarounds of formerly low-performing districts – making Mastery the national leader in turning around public schools.

Movers Specialty Service
Founded: 1978
Headquartered: Montgomeryville, PA
Local Employees: 170
Take Note: The company, which provides expert relocation services, is uniquely renowned for its "MSS University," an in-house, best-practice training and development curriculum for employees, complemented by innovative performance management, tuition reimbursement and leadership development programs.

Penn Jersey Paper
Founded: 1963
Headquartered: Philadelphia 
Local Employees: 336
Take Note: Operating out of a 250,000-square-foot, state-of-the-art office and warehouse facility in Northeast Philadelphia, Penn Jersey Paper offers customers over 8,000 stock items, including leading national brands. The company's distribution network also provides customers with quality products in packaging, paper, chemicals, consumables, smallwares and equipment.

Philadelphia Insurance Companies
Founded: 1962
Headquartered: Bala Cynwyd, PA
Local Employees: 622
Take Note: Since 1980, Philadelphia Insurance Companies (PHLY) and its employees have donated more than $14 million to charitable causes and organizations in support of Education, Human Services, Culture and Arts, and the Environment. PHLY's volunteering program allows eligible employees to take 7.5 hours of paid time-off to volunteer with nonprofit organizations of their choosing. In 2015, more than 1,000 employees volunteered for a total of 17,903 hours.

PricewaterhouseCoopers LLP
Founded: 1874
Headquartered: New York City
Local Employees: 1,900
Take Note:  PwC's commitment to their employees has never wavered. In 2015, the accounting practice introduced a new benefit to help associates and senior associates pay down their college debt. The Student Loan Paydown plan — a first of its kind in the industry — pledges $1,200 a year per employee towards student loans.

Founded: 1970
Headquartered: Philadelphia
Local Employees: 1,084
Take Note: SPIN provides residential, employment, home and community and behavioral health services for adults with intellectual disability or autism. For SPIN employees, professional is key. The nonprofit offers onsite undergraduate and graduate programs, a leadership pathway, online learning and a rich array of in-service learning.

Toll Brothers
Founded: 1967
Headquartered: Horsham, PA
Local Employees: 947
Take Note: The nation's leading builder of luxury homes serves move-up, empty-nester, active-adult, and second-home buyers and operates in 19 states. All full-time employees can reserve luxurious Toll Brothers guesthouses in fabulous locations. These are available year round and employees are encouraged to invite family and friends to experience the Toll Brothers lifestyle. On their 10th, 20th, and 30th anniversaries, employees receive expense-paid trips for two to destinations of their choice.

Urban Engineers
Founded: 1960 
Headquartered: Philadelphia 
Local Employees: 264
Take Note: This consulting practice features a tuition reimbursement program that helps employees to develop professionally through continuing education. Completing an E.I.T., P.E., C.P.A, Bachelor's Degree or Master's Degree program in approved curriculums results in a 5 percent salary increase, up to a maximum of $4,000 after documentation of the accomplishment is provided.