Financial planning tailored to your goals

Team Photo

With the complexity of today's markets and uncertainty about tomorrow's economy, good financial advice is more important than ever. As a team of dedicated Financial Advisors, we're committed to helping you organize your finances around your short term needs, your longer-term goals and what you envision for generations to come. Our knowledgeable perspective, good judgement and broad experience can help you meet your challenges and seize opportunities.

Camera lens-POV

Pursuing your goals together

Our mission is to provide quality strategies customized to your needs. Our goal is to be your primary source of financial advice. To this end, we concentrate our efforts on developing long-term relationships through a commitment to quality client service.

  • Timothy O'Brien Profile Photo

    Timothy O'Brien

    Managing Director–Wealth Management

    Financial Advisor

    • image
    • image
    • image
    • AL
    • AZ
    • CA
    • CO
    • CT
    • DC
    • FL
    • GA
    • IL
    • KS
    • MA
    • MD
    • ME
    • MI
    • NC
    • NH
    • NJ
    • NM
    • NY
    • OH
    • OK
    • OR
    • PA
    • RI
    • SC
    • TN
    • TX
    • VA
    • VT
    • WA
    • WV
    • WY

    With over four decades in the financial services industry, Tim has built his career on trust, integrity, and exceptional client care—values proven not just in words but in action, reflected in client relationships that span decades, reaching back to his earliest days at      EF Hutton in 1983. He learned the business from the ground up and quickly earned a reputation for his relentless work ethic—a commitment that continues to define his practice today.

    Tim went on to join PaineWebber in 1990 and later served as Branch Manager of the South Burlington, Vermont office from 1995 to 2001. In 2008, he earned the firm’s Wealth Advisor designation, underscoring his dedication to delivering thoughtful, personalized strategies. A testament to his continued dedication, Tim has been recognized on the Barron’s Top 1,200 Financial Advisors list every year since 2010.

    He anticipates client needs, delivers clear strategies, and is fully present throughout each step of their financial journey. Inspired by Vince Lombardi’s words that “the dictionary is the only place where success comes before work,” Tim lives by that philosophy, working each day so his clients can move forward with confidence, protect their wealth, and preserve their legacies for generations to come.

    Tim has a long history of community involvement, including his years of support for the Boys & Girls Club. Today, he also enjoys supporting his wife Jodie’s small business, DUET, especially through its partnership with the IDDeal Foundation, which creates meaningful employment opportunities for adults with intellectual and developmental disabilities.

    Outside of work, Tim and Jodie share a love of travel, golf, and skiing, and they especially cherish time spent with their children and grandchildren.

    • Barron's Top 1,000 Financial Advisors, 2011, 2012, 2013The Barron's rating is awarded annually in March and is based on information from the prior year Q3. 
    • Barron's Top 1,200 Financial Advisors, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025
      The Barron's rating is awarded annually in March and is based on information from the prior year Q3. 
    • Forbes Best-in-State Wealth Advisors, 2024, 2025The Forbes rating is compiled by Shook Research and awarded annually in April based on information from a 12 month period ending June of the prior year.

    • University of Vermont, Bachelor of Sciences, Resource Economics
      38 Eastwood Drive
      Suite 400
      South Burlington, VT 05403
      timothy.obrien3@ubs.com
      Timothy O'Brien
      38 Eastwood Drive,South Burlington,VT,05403
    • Stefanie Gretkowski Profile Photo

      Stefanie C. Gretkowski, CFP, CDFA

      Senior Wealth Strategy Associate

      CERTIFIED FINANCIAL PLANNER

      • image
      • image
      • image
      • AZ
      • CA
      • CT
      • FL
      • IA
      • IN
      • KS
      • MA
      • ME
      • MI
      • MT
      • NC
      • NH
      • NJ
      • NY
      • OR
      • SC
      • TX
      • VA
      • VT
      • WA

      Experience

      • 26 years of experience in the insurance and financial service industry
      • Stefanie started at Prudential Insurance in 1997 and joined PaineWebber Inc. in 1998
      • In 2000 to 2003 she joined Smith Barney and then rejoined UBS Financial Services in 2003
      • In 2013 Stefanie obtained her CERTIFIED FINANCIAL PLANNER® certification and is CFP® professional

       

        • Champlain College, Master of Business Administration
        • Johnson State College, Bachelor of Arts – Professional Studies, focus in business
        • CERTIFIED FINANCIAL PLANNER
        • Certified Divorce Financial Analyst
        38 Eastwood Drive
        Suite 400
        South Burlington, VT 05403
        stefanie.gretkowski@ubs.com
        Stefanie C. Gretkowski, CFP, CDFA
        38 Eastwood Drive,South Burlington,VT,05403
      • headshot

        Jake Dieterle

        Senior Wealth Strategy Associate

        CERTIFIED FINANCIAL PLANNER

        • image
        • image
        • image
        • AK
        • AL
        • AR
        • AZ
        • CA
        • CO
        • CT
        • DC
        • DE
        • FL
        • GA
        • HI
        • IA
        • ID
        • IL
        • IN
        • KS
        • KY
        • LA
        • MA
        • MD
        • ME
        • MI
        • MN
        • MO
        • MS
        • MT
        • NC
        • ND
        • NE
        • NH
        • NJ
        • NM
        • NV
        • NY
        • OH
        • OK
        • OR
        • PA
        • PR
        • RI
        • SC
        • SD
        • TN
        • TX
        • UT
        • VA
        • VI
        • VT
        • WA
        • WI
        • WV
        • WY

        Jake first joined UBS as an intern during college at our Portland, ME branch. After graduating from Trinity College he moved to New York City to join UBS in the Financial Advisor Development Program. Upon finishing the Development Program he worked in the firm’s Institutional Advisory Group for four years during which time he obtained his CERTIFIED FINANCIAL PLANNER®, certification. In that role he was a Financial Advisor and Corporate Stock Benefit Consultant working with Directors and Executives of the firm’s corporate clients in the equity award space. He moved to the South Burlington Branch in 2024.

        Jake takes a planning-first approach to investing, using comprehensive financial planning to design strategies aligned with each client’s specific goals, timeline, and risk tolerance. Rather than relying on a one-size-fits-all approach, Jake focuses on tailoring investment decisions to what matters most to clients - whether that’s retirement security, wealth preservation, or long-term growth. This disciplined, goals-based framework helps ensure investments remain purposeful, adaptable, and aligned through any life changes.

        In his personal life, Jake enjoys being active and spending time outside, something he cherished as a member of the Track and Field team at Trinity. While no longer competing on the Track, Jake enjoys golfing and playing basketball with friends. He lives in Shelburne with his wife, Eliza and their dog, Holley.

          • Trinity College, Bachelor of Arts in Economics
          • Trinity College, Minor in Formal Organizations, Fast Track in Entrepreneurial Studies
          • Dartmouth College, Tuck Business Bridge Program at Dartmouth
          • CERTIFIED FINANCIAL PLANNER
          38 Eastwood Drive
          Suite 400
          South Burlington, VT 05403
          joseph.dieterleiv@ubs.com
          Jake Dieterle
          38 Eastwood Drive,South Burlington,VT,05403
        • Jennifer

          Jennifer C. McGrath

          Senior Registered Client Associate

          • image
          • image
          • AK
          • AL
          • AZ
          • CA
          • CO
          • CT
          • DC
          • DE
          • FL
          • GA
          • IA
          • IL
          • IN
          • KY
          • MA
          • MD
          • ME
          • MI
          • MT
          • NC
          • NH
          • NJ
          • NM
          • NV
          • NY
          • OH
          • OR
          • PA
          • RI
          • SC
          • TN
          • TX
          • UT
          • VA
          • VT
          • WA
          • WY

          Experience:

          Jennifer joined the firm, formerly, PaineWebber in 1994.  She worked with Tim and his Branch Management until she left to raise her three boys.  She returned to the O'Brien Gretkowski Team in 2014.  She is a Senior Registered Client Associate with 20 years experience in the Financial Services Industry.

          Degree:

          Bachelor of Arts - Business Administration 1998, Champlain College, Burlington, VT

          Personal:

          Played 2 years of Soccer and Softball at the Collegiate level.  She loves to play golf with her family, especially her three boys Connor, Seamus and Kiefer.  She enjoys watching them play baseball, from Little League right up through the Collegiate Level and traveling with them.

            • Champlain College, Bachelor of Arts - Business Administration
              38 Eastwood Drive
              Suite 400
              South Burlington, VT 05403
              jennifer.mcgrath@ubs.com
              Jennifer C. McGrath
              38 Eastwood Drive,South Burlington,VT,05403

            UBS Year Ahead 2026

            Escape velocity?

            Our Chief Investment Office presents its outlook for the new year in the 2026 edition of Year Ahead.

            Stocks are rising on AI momentum, but inflation and national debt pose new challenges. Let’s review the research together and find the best solutions for the year ahead—and beyond.

            Read the report

            Connecting you to the deep resources of UBS

            By seeing the big picture, we provide access to the global platforms and the financial and intellectual strengths of UBS’s experts in Wealth Management, Asset Management and our Private and Investment Banks.

            Three generations in apple orchard

            Turn possibilities into a plan

            What’s really important to you—today and for the long term? UBS Wealth Way starts with questions and discussions that can help you organize your financial life into three key dimensions: Liquidity—to help provide cash flow for short-term expenses, Longevity—for longer-term needs and Legacy—for needs that go beyond your own.

             

            UBS Wealth Way is an approach incorporating Liquidity. Longevity. Legacy. strategies that UBS Financial Services Inc. and our Financial Advisors can use to assist clients in exploring and pursuing their wealth management needs and goals over different time frames. This approach is not a promise or guarantee that wealth, or any financial results, can or will be achieved. All investments involve the risk of loss, including the risk of loss of the entire investment. Time frames may vary. Strategies are subject to individual client goals, objectives and suitability.

            Retirement couple holding surfboards

            Retirement planning

            You've worked hard and carefully invested to ensure that you’ll live life on your terms in retirement. But are you ready for a retirement that could span 30 years or more? What’s the right plan to help make sure your retirement funds last? Our team will work with you to help preserve your lifestyle and livelihood in retirement by understanding your goals, risk and time horizon.

            A leader in wealth management

            Backed by the strength of our parent company, UBS AG

            $6.9 trn

            UBS Group invested assets
            As of 10/29/2025

            51 countries

            Our global footprint

            Global leader

            UBS is a leading and truly global wealth manager

            Insights

            This website uses cookies to make sure you get the best experience on our website. You can find more information under the Privacy Statement. You are free to change your cookies' settings in the privacy settings.

            Go to privacy settings