Get to Know Our Attorneys

Caroline Mueller


Attorney Caroline Mueller grew up locally, she received a Bachelor’s degree from Kent State University and a Juris Doctorate degree from The University of Akron School of Law. She has been actively engaged in the practice of law since 1992. She personally believes in the strength of women and the immigrant heritage of the United States.

Helping Individuals Seeking Employment-Based Immigration

Her focus is providing employers and employees with the latest and most appropriate immigration strategies. She represents businesses as well as individuals and families undergoing the US Immigration process, guiding them through available options to select the path best suited to them and their employee.

Associations and Accolades

Attorney Mueller is admitted to practice law in:

  • The State of Ohio
  • The United States District Court for the Northern District of Ohio
  • Before all Federal immigration agencies and courts nationwide

She is also a member of the American Immigration Lawyers Association and has over 20 years of legal experience.

George Sintsirmas

Managing Partner

George Sintsirmas has a keen eye for what it takes to successfully pursue his clients’ interests. As a founding member of Sintsirmas & Mueller Co. L.P.A., George has brought his considerable experience in the areas of Class action, Personal injury, Insurance, and Immigration law to counsel clients to successful outcomes.

Having worked for a number of large organizations/corporations for over 30 years, including his own private practice, George is fully aware of the level of commitment that is necessary to navigate the complexities of the legal system and achieve his clients’ goals. His core belief that "hard work and imagination wins the day" has been verified in settlements and jury verdicts for his clients since 1984, in excess of $70,000,000.

George was born and grew up in Greece. Upon graduation from High School, he came to the United States in 1977, learned English, and then attended and graduated from Cleveland State University in 1981. Following Cleveland State, he attended Case Western Reserve University School of Law, graduated in 1984, and was admitted to the practice of Law in the State of Ohio that same year. His personal experience as an immigrant to the U.S., and eventually a naturalized citizen, has been the defining principle in his practice and career.

Areas of Practice

  • Litigation
  • Class Actions
  • Insurance
  • Immigration


  • Case Western University School of Law- J.D., 1984
  • Cleveland State University, B.A., 1981- Political Science & Economics Cum Laude

Spyridon Sintsirmas

Associate Attorney

Attorney Spyridon Sintsirmas serves Cleveland, Ohio and the surrounding areas with world-class, quality legal services. As an associate member of our legal team at Sintsirmas & Mueller Co. L.P.A., he offers his legal insight across a wide spectrum of practice areas. In addition to immigration matters, he handles cases involving class action, insurance, litigation, and insurance law.

Spiro received Bachelor’s Degree in Philosophy from Cleveland State University in 2009, graduating as a Summa Cum Laude. He then went on to complete his Juris Doctorate from the Cleveland Marshall School of Law, graduating Cum Laude in 2012. Spiro is admitted to practice law in the Ohio State Bar Association.

Areas of Practice

  • Litigation

  • Class Actions
  • Insurance
  • Immigration
  • Cannabis Law


  • Cleveland Marshall School of Law J.D. Cum Laude, 2012

  • Cleveland State University, B.A., 2009 Philosophy Summa Cum Laude

Carmen B. Kluth - Legal Assistant

Carmen B. Kluth is originally from Peru and has been living in the United States since 2004. Carmen graduated from San Marcos University in Peru with a LL.B degree (Equivalent of a Juris doctor in US). She is a 2007 graduate with honors from the LLM program (Master in Law) at Case Western Reserve University in Cleveland Ohio.

Carmen is fluent in English and Spanish and can read and understand Portuguese.

She is passionate about facilitating communication and understanding people from different cultures regarding immigration issues.

Contact Sintsirmas & Mueller Co. L.P.A. Today

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