Find Employment in Billings, MT


It's The Way We Do Business, With Our Candidates and Our Clients

With our experienced, dedicated recruiters asking the right questions and listening for the right answers, we qualify more candidates and create superior matches. Our hiring experience also naturally leads to higher-quality referrals. We truly understand that it's not only skill matching but also a personality fit. We listen to the client's needs.

The result are happier employees, faster, more efficient, more successful staffing, fewer headaches, and less turnover.


Established in 1996, Employment Source is an independently owned staffing and payroll service agency based in Billings, Montana, that operates nationwide. Our experience as Hiring Experts and Human Resource Professionals has given us the solid professional background to provide you with the very best talent at the highest level of service. From temp-to-hire and temporary staffing to direct hire and executive search, we offer a complete suite of staffing services across market sectors, specialties and industries.

Our Wide Range of Services

  • Temporary and Permanent Job Placement
  • Recruiting and Screening
  • Event and Project Staffing
  • Payroll Services

We Find Skilled and Productive Workers, Not Job Seekers

  • Accounting
  • Administrative
  • Automotive
  • Construction
  • Clerical
  • Engineering
  • Executive
  • Finance
  • Industrial
  • Mechanical
  • Medical
  • Marketing
  • Sales
  • Secretarial
  • Technical

Team Bios

Terry Mammenga

Extension: 104,
Terry Mammenga, along with his wife Sandra, have been co-owners of Small Business Group, D.B.A. Employment Source since 1996. He has earned a Bachelor's degree in business and holds the certification of Senior Professional in Human Resources (SPHR), as well as a certification in Industrial Safety. Terry's career has been in Accounting, Payroll and Human Resources.

Sherri L. Houston

Extension: 106,
Sherri Lynn Houston is the Manager of Business Development for Employment Source responsible for sales and customer service since 2015. Her 30 years of sales experience enables her to listen to the clients and identify their needs. She is passionate about her job, often stating her biggest rewards come from helping her clients find the right applicants for their positions. Give Sherri Lynn a call for all of your staffing needs.

Sherre Garbutt

Extension: 108,
Sherre Garbutt came to Employment Source in 2012, hoping for help in finding herself a job following her relocation from California. She is a Recruiter/Staffing Coordinator and says she loves making new friends and helping them find the right position for them. Need a job? Looking for a better one? Come in and see Sherre for the professional help you need.

Julie Dunn

Extension: 105,
Julie Dunn has been with Employment Source as Payroll Administrator/Accountant/Office Manager since 2003. She holds a degree in Marketing and Management. As Payroll Administrator, she processes weekly, bi-weekly, semi-monthly, and monthly payrolls for our many clients. As Accountant, she maintains the books, prepares standard and special reports as needed as well as processing all state and federal payroll taxes assuring their correct and timely filing. Julie is also responsible for the daily management of the Billings office.

Kari Shelton

Extension: 103,
Kari Shelton joined the Employment Source team in April, 2017, as a Recruiting Specialist. Prior to joining us, Kari worked in customer service for a travel agency for over twelve years. You will find Kari friendly and outgoing and always ready to help applicants find the right position to match their skills.

Natasha Powers

Extension: 101,
Natasha Powers started working as our Administrative Assistant in March, 2017. She has worked various positions as receptionist, data entry clerk, administrative assistant, and event coordinator prior to joining our team. Natasha's smile will probably be the first one you see when you walk into Employment Source, and her customer service and clerical skills should make your job search an enjoyable experience.