Testimonials from Investigation Clients

In an effort to understand why my nephew was having difficulty obtaining a job, I recently employed Mr. Ralph Nosek to conduct a background check to surface any issues that might be undermining my nephew’s employment efforts. Not only did Mr. Nosek use multitudinous sources to provide comprehensive background information, but based on his firm understanding of the law, he also analyzed the information to pinpoint the issues that were contributing to my nephew’s unemployment. Throughout the entire process, Mr. Nosek persistently demonstrated outstanding professional expertise, strong interpersonal skills, and unimpeachable integrity. Based on my interaction with him, I highly recommend Mr. Nosek for any private investigation needs and am confident that he will find answers to your questions.


Ralph worked quickly and efficiently to locate my daughter, using legal resources to find where she was staying, and provide the information to me and my family. I would hire him again if I needed an investigator.

Thanks again!

N.N.B. – Baton Rouge, Louisiana

I have worked with Ralph Nosek Investigations aka: S.F. Bay Area Sleuth for the past 4 years. He is easy to talk with, and extremely knowledgeable in numerous fields. He has been able to find information for me I doubt anyone else would’ve taken the initiative to locate. He is also very trustworthy. I highly recommend him.

MG – Santa Cruz


Thanks so much for everything you did for me and my Family.

Will let you know how it shakes out.

Jay – San Francisco

Dear Mr. Nosek:

Thanks for your help with the background of my sister. We are working on a plan to address both illnesses


Jaekie – Pacifica

R.A. Nosek investigations were first of all, very prompt in replying back to me after leaving a voice message. They were very professional during the investigation of my case. Ralph himself made me feel at ease and was empathetic to my professional needs. My case took a few turns during the investigation. Ralph and his team stayed focused while still providing me with exceptional communication and customer service. I would highly recommend Ralph and his team to any one who wants their case handled professionally.  Thank you and much appreciation.  5 Stars.

Nancy – San Francisco Bay Area

Ok, thank you sooooooooooooo much. I really appreciate this. Probably won’t contact her, just wanted to know if I could.

I will probably give his address to my attorney now, so he can write him a letter first, then also start the process.

Thank you very much, Ralph. You’ve been great!

D.M. – San Jose

Ralph Nosek is a thorough, highly-qualified, and professional investigator.  But more than that he takes the time to listen to and understand how he can best serve his clients.  Ralph’s experience became evident to me within a moment of speaking him for the first time and it was clear he comprehended my needs which brought a sense of relief knowing he was on the case.  His results and efforts were exceptional.  Ralph has the knowledge and resources to get the job done.

J.L.- Burlingame, California

Mr. Nosek has worked for me for more than 4 years. He has done a very good job in his efforts on my behalf. He has proven that he can find anything you need to know on any type of case. There have been times when he has worked for me 24/7 with little or no sleep. Mr. Nosek is very caring and knowledgeable. He can handle any issue involved with your case. If you need an investigator, he’ll be the one!!!.

M.D. – San Francisco Bay Area

I want to thank you for all of your help for your efforts during the year. You are in fact one of the only people that has been able to give me answers. I appreciate all of your time, especially researching the records last week which proves his intentional misrepresentations to the police. I will refer anyone who needs your help and professional services.

E.O. – San Francisco Bay Area

Ralph Nosek is an incredibly knowledgeable investigator. My experience in working with him was very positive. The information that he was able to provide to me was invaluable. I felt that he was very thorough in his investigative work and provided me with the detailed information that I required. He is also a very caring and compassionate man. I was amazed at how quickly he was able to complete the case and his willingness to put in some incredibly long hours. I feel very fortunate to have found Ralph to work with and would highly recommend him to anyone needing an investigator. He is a true professional!

Leila – Redwood City, California

I have used Ralph Nosek on and off for one year and recommend him highly. He has been great help to me and I have been happy with his work. He is a very honest person and he follows his work with great judgment. I would highly recommend Ralph and in any situation.

L Garcia – Redwood City, California

I just wanted to take the time to say Thank You for your assistance and advice in the search for a lost relative of my best friend. Your response was quick, professional and provided the encouraging information this family needed to continue their search. Greg G. had been out of contact with all of all his relatives for 10 years, he was found 2 days ago alive.

Michael Stogner – San Carlos, California

We recently used the services of Ralph Nosek and we were impressed with his professionalism and the speed in which he was able to gather the information needed. It was a challenging situation that we asked Mr. Nosek to follow up on, however he worked well with us and tried to accommodate us at each request. The information we obtained through Mr. Nosek was invaluable to our case.

J.H. – Hillsborough

Ralph Nosek’s expertise in surveillance and investigation was pivotal in exposing a dishonest adversary in the courtroom. Evidence provided by Mr. Nosek turned what would have been a long, drawn out legal battle into a relatively short hearing which ended completely in my favor.

S.M. – San Francisco