About Us

What is our passion and purpose? IMPROVING THE FUTURE FOR LANDLORDS.

What we do better than anyone else? SOLVE LANDLORD PROBLEMS EXPERTLY.

What makes us unique?


Since 2012, One Focus Property Management has been providing best in class property management services to landlords in the West Branch Valley. Our team of dedicated professionals is led by Broker, Brent M Fish and Vice President, Jennifer S. Ruelens, MBA. One Focus Property Management is the largest property management company in our region and is proud to set the standard for exceptional service to both landlords and tenants.

Our sister company, Fish Real Estate, was founded in 1956 and is the local leader in real estate sales with specialist in residential, commercial, industrial, outdoor recreational and investment sales and leasing. Through this partnership, we are able to offer our clients the best service for all of their real estate transactions.

We believe that in order to be successful our people, policies and actions must be value driven. Our team is bonded by our shared values. We allow our core values to guide us through hard work and difficult decisions. Our core values are what we hold most dearly, and we believe that when we run our business in accordance with our values, superior service and client satisfaction will follow. See more about our core values here.

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Brent M. Fish Broker

Brent Fish is a recognized leader in the central Pennsylvania real estate marketplace. A successful entrepreneur, Brent Fish has taken a traditional, family-owned real estate firm and transformed it from a main street residential brokerage into a diversified residential, commercial, property management and recreational properties real estate organization. Loyal to his hometown roots, Brent is the current Chair of the UPMC Susquehanna Invitational which has raised over $1 million in support of unbudgeted items for the local healthcare system. He has served on the Williamsport Chamber of Commerce, Industrial Properties Committee; the Williamsport Planning Commission; the Lycoming County Natural Gas Task Force; and the Economic and Community Growth Corporation. Brent has been recognized with the Small Business of the Year Award by the Lycoming Chamber of Commerce and Top 5 Producer Award by the MLS Board of Realtors six times.

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Jennifer S. Ruelens, MBA Vice President

Jennifer lives in South Williamsport with her husband Dave and their dogs, Vivi and Frankie. Some of her favorite things about Williamsport include the lack of traffic, farmers market, and the Susquehanna River Walk. Jennifer started her career in property management in Harrisburg, PA leasing and managing various large rental communities in 2004. After taking some time to complete a full time MBA program at Penn State, she moved to Williamsport and partnered with Fish Real Estate to create One Focus Property Management. She now leads this business in managing the largest residential real estate portfolio in the area. Her passion is finding ways to maximize the value of her clients’ investments by providing comfortable homes for people, reducing risk in operations, and by controlling costs. Jennifer frequently gives rental property advice on news programs and podcasts. She also teaches a Landlord 101 course at the Pennsylvania College of Technology’s Workforce Development Center. When she isn’t working, she is playing with her dogs in the river. Some of her favorite things include biking on local rail trails, reading and wine tasting in the Finger Lakes.