Piedmont Dog Walker and Off Leash areas

We moved from SF where our 7 yr old g shepherd mix had a great dog walker who did hour walks with him to lots of places, off-leash parks and more. Is there anyone I should check out that could help us keep our boy active? I really want him to be able to run, with or without other dogs, but we don’t have much in the way of big grassy lawns or beaches near us for him to really get him running. I’ll also take off-leash area recommendations for weekends, what’s good in East bay?