Well, you ideally want to find another new position as head of an analytical lab, likely one that does HPLC, or other chromatography, like GC. I hope your resume lists, for your last position, specific directives, initiated by you as head of the HPLC lab, that improved the function of the lab over the years. I hope you have specific tasks, that you oversaw, that solved very tough problems, for example, developing a new, validated method for a tough analysis or orchestrating a new sample submission or results reporting method to eliminate bottlenecks in getting results out. If so, you may have better luck soon. I'm currently looking for analytical chemistry position, but I wasn't head of the lab, so I can't make the claims that you can. But I do find upper level HPLC analytical positions on career websites.