Seventy percent of this year's winners report voluntary turnover rates of 5 percent or lower, with two reporting rates of just 1 percent.

Read: Which workers are happiest with their retirement plans?

That's way lower than the national average of 11 percent. Executives at the winning firms also say that their benefit strategies also are critical to maintaining high levels of employee engagement, motivation, and productivity.

With only one exception, these companies offer and fund financial wellness programs and one-to-one financial guidance.

Here's a look at the 10 winning companies and the things they do that make them so special.

1. Alterman Group, Inc.

San Antonio, Texas

Construction business Alterman Group offers and funds

• a 401(k) and defined benefits plan;

• profit-sharing bonus and employee-stock ownership plans for its 750 employees;

• comprehensive health insurance (100 percent of premiums);

• short- and long-term disability;

• dental, group life, vision, accident, and critical illness insurance.

The 401(k) includes a 50 percent match up to a max of $8,500. The retirement plan includes extensive educational and guidance tools and resources.

2. Atrion, Inc.

Warwick, Rhode Island

IT firm Atrion not only offers and funds 401(k) and profit-sharing bonus plans for its 273 employees, it automatically enrolls newly hired eligible employees and sets the default asset allocation in a lifecycle fund.

The plan also provides extensive educational and guidance tools and resources, and a 3 percent 401(k) match. In addition, Atrion offers

• comprehensive health insurance (for which it pays 100 percent of premiums);

• short- and long-term disability;

• dental, group life, vision, accident, and critical illness insurance.

3. Customized Energy Solutions

Philadelphia, Pennsylvania

With 115 employees, energy/renewables firm Customized offers and funds

• 401(k), profit-sharing bonus, and employee-stock ownership plans;

• comprehensive health insurance (and pays 80 percent of premiums);

• short- and long-term disability;

• dental, group life, vision, accident, critical illness, and long-term-care insurance.

 The retirement plan features automatic enrollment of newly hired eligible employees, auto escalation, extensive educational and guidance tools and resources, dollar-for-dollar 401(k) match up to a maximum of $10,500 or 4 percent of employee's gross salary, and fixed employer contribution of $6,000.

4. Fishbowl

Orem, Utah

Technology firm Fishbowl offers and funds for its 103 employees  

• 401(k), defined benefit, profit-sharing bonus, and employee-stock ownership plans;

• comprehensive health insurance (for which it pays 75 percent of premiums);

• short- and long-term disability;

• dental, group life, long-term care, vision, accident, and critical illness insurance.

 The retirement plan features auto-escalation, extensive educational and guidance tools and resources, and dollar-for-dollar 401(k) match up to a maximum of 5 percent of gross salary.

5. Hudson Valley Federal Credit Union

Poughkeepsie, New York

Hudson Valley offers and funds for its 630 employees

• 401(k) and defined benefit plans;

• comprehensive health insurance (for which it pays 85 percent of premiums);

• short- and long-term disability;

• dental, group life, vision, and accident insurance; offers employee-funded critical illness insurance.

 The retirement plan features automatic enrollment of newly hired eligible employees, extensive educational and guidance tools and resources, and a 75 percent 401(k) match to a maximum of $5,400.

6. International Foundation of Employee Benefit Plans

Brookfield, Wisconsin

The International Foundation, perhaps appropriately, offers and funds for its 140 employees

• a 401(k) plan and defined benefit plan;

• comprehensive health insurance (and pays 90 percent of premiums);

• short- and long-term disability;

• dental, group life, vision, accident, and long-term-care insurance.

 The retirement plan features default asset allocation in a lifecycle fund, extensive educational and guidance tools and resources, and a 75 percent 401(k) match up to a maximum of $18,000.

7. MSU Federal Credit Union

East Lansing, Michigan

This credit union offers and funds for its 595 employees

• a 401(k) plan;

• comprehensive health insurance (and pays 100 percent of premiums);

• long-term disability;

• dental, group life, long-term care, vision, accident, and critical illness insurance.

The retirement plan features auto-escalation, default asset allocation in a lifecycle fund, extensive educational and guidance tools and resources, and a 5 percent 401(k) match up to a maximum of $26,500.

8. MZA Associates Corporation

Albuquerque, New Mexico

This R&D contractor offers and funds for its 42 employees

• 401(k), profit-sharing bonus, and employee-stock ownership plans;

• comprehensive health insurance (for which it pays 100 percent of premiums);

• short- and long-term disability;

• dental, group life, long-term care, vision, accident, and critical illness insurance.

The retirement plan features auto-enrollment of newly hired eligible employees, auto-escalation, default asset allocation in a lifecycle fund, extensive educational and guidance tools and resources, and a 10 percent 401(k) match up to a maximum of $25,000.

9. USD Group LLC

Houston, Texas

This energy logistics and terminalling company offers and funds for its 59 employees

• 401(k), profit-sharing bonus and employee-stock ownership plans;

• comprehensive health insurance (and pays 100 percent of premiums);

• short- and long-term disability;

• dental, group life, long-term care, vision, accident, and critical illness insurance;

• long-term incentive plan.

The retirement plan features auto-enrollment of newly hired eligible employees, extensive educational and guidance tools and resources, and a 4 percent 401(k) match up to a maximum of $18,000.

10. We Insure Group, Inc.

Jacksonville, Florida

This insurance/benefits company offers and funds for its 45 employees

• a 401(k) plan and profit-sharing bonus;

• comprehensive health insurance (and pays 100 percent of premiums);

• short- and long-term disability;

• dental, group life, long-term care, vision, accident, and critical illness insurance.

The retirement plan features auto-enrollment of newly hired eligible employees, auto-escalation, default asset allocation in a lifecycle fund, extensive educational and guidance tools and resources, and a 5 percent 401(k) match up to a maximum of 5 percent of gross pay.