HR Generalist / Benefit Administrator

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Authorization: The information listed above is complete and true to the best of my knowledge and belief. I acknowledge that any false statement or omission in answering the above questions may result in the rejection of my application or can result in immediate discharge and/or termination of employment. I hereby release the Company, previous employers, references and all persons contacted from any and all damages incurred while verifying the accuracy of the information provided. In consideration of my employment, I agree to abide by all Company rules and regulations.

This offer of employment is at-will. This is not a contract. At-will employment means either party can terminate the relationship with the other party for any reason or no reason at all, and at any time. The terms of this offer letter supersede any prior written or oral representations or statements made to you by any representative of the Company prior to the date on which you sign this document.

CoStaff Services provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion, sex, national origin, age, disability or genetics. In addition to federal law requirements, CoStaff Services complies with applicable state and local laws governing nondiscrimination in employment in every location in which the company has facilities. This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation and training.

I further agree that only the Company President, has now or has had in the past any authority to enter into any agreement for employment for any specified period of time or to make any agreement which is contrary to or a modification of the employment-at-will relationship, and that such agreement or representation must be in writing and signed by both myself and the President of the Company in order to be effective.

Pre-employment: It is our Company policy to conduct Employer Reference Checks, Background Investigations and Drug Screens on all new hires as a condition of employment. Employment is also contingent upon you being either a United States citizen or legally authorized to work in the United States.

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After submitting your application, you will be taken to an online qualification test. The test will take approximately 30 minutes to complete.

CoStaff is looking for an experienced HR Professional to join our PEO/HRO team!

The HR Generalist / Benefit Administrator is responsible for performing administrative HR-related duties on a professional level and works closely with HR Management and HR Business Partners in supporting approximately 1000 employees. This position carries out responsibilities in the following functional areas: benefits administration, health bill reconciliation, 401k administration, on-boarding, employee relations, and policy administration, while ensuring data accuracy.

Responsibilities and Duties

  • Administers various human resource programs for all assigned clients
  • Maintains human resource information system records and compiles reports from the database
  • Benefit Administration; new hires, life events, employee changes, terminations, open enrollment, claims resolution and employee benefit inquires
  • Monthly Health Bill Auditing 
  • Health Bill Issue Resolution
  • Maintains compliance with federal and state regulations concerning employment
  • COBRA Administration
  • 401(k) Administration
  • Family Medical Leave Act (FMLA) Administration and Leave of Absence (LOA) tracking
  • Flexible Spending Account (FSA) Administration

· Setup and maintain online benefit enrollment portal for assigned clients

· Assist with coordinating and Annual Open Enrollment for assigned clients

· Unemployment Claims tracking and participate in hearings as necessary (Multi-State)

· Back-up for Workers’ Comp Claims Administration (Multi-State)

· Medical Support Notice Administration

· Background Check Administration

· Payroll administration as required

· Performs other related duties as required and assigned


  • Bachelor’s Degree in Human Resources Management or a related field of study
  • PHR (SHRM-CP) / SPHR (SHRM-SCP) or other recognized Human Resources Certification preferred


  • 3-5 years of HR or related experience
  • Experience with HRIS systems and PEO experience a plus
  • Technical / Accounting knowledge a plus


  • Provide excellent customer service and analytical support in the delivery of HR and benefits programs
  • Advanced knowledge of benefits 
  • Excellent organizational skills & strong attention to detail
  • Knowledge of pertinent state and federal HR regulations
  • Excellent written and verbal communication skills
  • Able to handle multiple tasks and projects simultaneously
  • Positive, upbeat attitude and approach
  • Proven track record of taking initiative and being a team player
  • Ability to effectively interact with all levels at the client organization, i.e. Owners, Executives, Managers, Staff, etc.
  • Proficient with Microsoft Office Suite and HRIS Platforms

Additional Information:

CoStaff Services, L.L.C. offers a competitive compensation, commensurate with experience, and a comprehensive benefits package. For more information on our company please visit If you are interested in this position, please forward your resume including salary requirements. 

Please note; CoStaff will not consider any out of state applicants.

Job Type: Full-time, Salary

Location: Southfield, MI

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Location: Southfield, MI
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