Okay, let's start by analyzing Gregory Shepelev's profile. First, his skills include a mix of web development technologies like CSS, HTML, PHP, Java, and databases like SQL and MySQL. He also has experience with Linux and Windows systems, plus social media marketing. That's a solid tech stack, especially for a web developer.

Looking at his experience, he's been working at Military Sales & Service since May 1903, which is listed as 121 years. Wait, that can't be right. That must be a typo or an error in the data entry. Maybe it's supposed to be 2003? But the end date says Present, so if we take the start year as 1903, that's impossible. So I'll have to consider that there's a mistake here. Assuming it's a typo, maybe he has around 20+ years of experience if it's from 2003 to 2024. That would make more sense. However, without knowing the correct dates, it's tricky. But given the education end year is 1999, he likely started working around then. So maybe 25 years of experience?

His education includes a Bachelor's in Computer Science and Business from the University of Texas at Tyler, completed in 1999, and some time at Tyler Junior College. That's a good educational background, supporting his technical skills.

Location is the United States, which has varying rates depending on the region. Since he's in the Dallas/Fort Worth area, the cost of living is lower than places like San Francisco, but still, experienced developers can command higher rates.

Considering his skills and the possible lengthy experience (assuming the dates are incorrect and he has over 20 years), a senior web developer with expertise in both front-end and back-end technologies (PHP, Java, SQL) might charge between $80 to $150 per hour. Social media marketing could add a bit, but it's more of a secondary skill here. Given the possible high experience level, maybe towards the higher end. But I need to factor in the US averages. According to various sources, senior developers in the US average around $100-$150/hour. However, if the experience duration is inaccurately long, maybe the rate is adjusted slightly lower. Let's say around $100-$120. Compromising on $110 as a midpoint.